CN108289069B - Transmission method, sending end and receiving end of reference signal - Google Patents

Abstract

The invention provides a transmission method, a sending end and a receiving end of a reference signal, and the method can comprise the following steps: a transmitting end transmits a demodulation reference signal to a receiving end on a DFT-S-OFDM symbol; and the transmitting end transmits the phase tracking reference signal and the data signal to the receiving end in a frequency division multiplexing mode on the DFT-S-OFDM symbol. The embodiment of the invention can reduce the phase noise of DFT-S-OFDM signal transmission.

Description

A reference signal transmission method, transmitter and receiver

technical field

The present invention relates to the field of communication technologies, and in particular, to a reference signal transmission method, a transmitter and a receiver.

Background technique

Signals of communication systems often have phase noise during transmission, wherein the phase noise comes from local oscillators in the transmitter and receiver, which will affect the transmission of multi-carrier signals. And in high frequency band (for example: above 6GHz) the influence of phase noise will be more serious. However, more high-band resources will be used for data transmission in future communication systems. For example, in the future 5G will use high-band (such as 6GHz to 100GHz) resources for data communication, and in the future 6G may also use Use high-band resources for data communication. And in the communication system, considering the Peak-to-Average-Power Ratio (PAPR), the Discrete Fourier Transform (OFDM) access technology is adopted in the transmission. Spread Orthogonal Frequency Division Multiplexing, DFT-S-OFDM) signal. The transmission using DFT-S-OFDM signal also has the influence of phase noise. It can be seen that how to reduce the phase noise of DFT-S-OFDM signal transmission is a technical problem that needs to be solved urgently at present.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a reference signal transmission method, a transmitting end and a receiving end, so as to achieve the purpose of reducing the phase noise of DFT-S-OFDM signal transmission.

In order to achieve the above purpose, an embodiment of the present invention provides a method for transmitting a reference signal, including:

The transmitting end transmits the demodulation reference signal to the receiving end on the DFT-S-OFDM symbol;

The transmitting end transmits the phase tracking reference signal and the data signal to the receiving end in the manner of frequency division multiplexing on the DFT-S-OFDM symbols.

Optionally, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

Optionally, the transmitting end transmits a demodulation reference signal to the receiving end on the DFT-S-OFDM symbol, including:

The transmitting end maps the demodulation reference signal to the N subcarriers of the DFT-S-OFDM symbol, transforms the demodulation reference signal on the N subcarriers to the time domain and sends it to the receiving end, wherein the The above N is the number of subcarriers in the transmission bandwidth.

Optionally, the transmitting end transmits the phase tracking reference signal and the data signal to the receiving end in a frequency division multiplexing manner on the DFT-S-OFDM symbol, including:

The transmitting end maps the phase tracking reference signal to M subcarriers in the N subcarriers of the DFT-S-OFDM symbol;

mapping the T modulation symbols of the data signal to T sub-carriers other than the M sub-carriers among the N sub-carriers;

Transform the phase tracking reference signals on the M subcarriers and the modulation symbols on the T subcarriers to the time domain and send them to the receiving end, where the T plus the M is less than or equal to the N, and the N is the number of subcarriers in the transmission bandwidth.

Optionally, the mapping of the T modulation symbols of the data signal to the T subcarriers other than the M subcarriers in the N subcarriers includes:

After serial-to-parallel conversion of the T modulation symbols of the data signal, T parallel modulation symbols are obtained, and discrete Fourier transform is performed on the T parallel modulation symbols to obtain T output data, and the T output data are mapped to T subcarriers other than the M subcarriers among the N subcarriers; or

After serial-to-parallel conversion of the N modulation symbols of the data signal, N parallel modulation symbols are obtained, and discrete Fourier transform is performed on the N parallel modulation symbols to obtain N output data, among the N output data T pieces of output data are selected, and the T pieces of output data are mapped to T sub-carriers other than the M sub-carriers among the N sub-carriers.

An embodiment of the present invention also provides a method for transmitting a reference signal, including:

The receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the demodulation reference signal;

The receiving end receives the phase tracking reference signal and the data signal that are frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the phase tracking reference signal;

The receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information;

The receiving end demodulates the data signal using the compensation channel information.

Optionally, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

Optionally, the receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the demodulation reference signal, including:

The receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, performs frequency domain transformation on the demodulation reference signal, and estimates channel information of the demodulation reference signal after frequency domain transformation.

Optionally, the receiving end receives the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the phase tracking reference signal, including:

The receiving end receives the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and performs frequency domain transformation on the signal received on the DFT-S-OFDM symbol , and estimate the channel information of the phase tracking reference signal after frequency domain transformation.

Optionally, the receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information, including:

The receiving end compares the channel information of the phase tracking reference signal with the channel information of the demodulation reference signal, and obtains the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located relative to the solution. The phase change information of the DFT-S-OFDM symbol where the modulation reference signal is located, and the phase change information is used to compensate the channel information of the demodulation reference signal to obtain compensated channel information.

Optionally, the receiving end receives the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the phase tracking reference signal, including:

The receiving end receives the phase tracking reference signal and the data signal that are frequency-division multiplexed and transmitted by the transmitting end on a plurality of DFT-S-OFDM symbols, and compares each DFT signal in the plurality of DFT-S-OFDM symbols - Perform frequency domain transformation on the signal received on the S-OFDM symbol, and estimate the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol after the frequency domain transformation;

The receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information, including:

The receiving end compares the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol with the channel information of the demodulation reference signal, and obtains that each DFT-S-OFDM symbol is relative to the solution. The phase change information of the DFT-S-OFDM symbol where the reference signal is located, and the phase change information corresponding to each DFT-S-OFDM symbol is used to compensate the channel information of the demodulation reference signal, to obtain each DFT-S-OFDM symbol. Compensation channel information corresponding to the S-OFDM symbol;

The receiving end uses the compensation channel information to demodulate the data signal, including:

The respective data signals are demodulated using the compensation channel information corresponding to each DFT-S-OFDM symbol.

The embodiment of the present invention also provides a sending end, including:

a first transmission module, configured to transmit the demodulation reference signal to the receiving end on the DFT-S-OFDM symbol;

The second transmission module is configured to transmit the phase tracking reference signal and the data signal to the receiving end in a frequency division multiplexing manner on the DFT-S-OFDM symbol.

Optionally, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

Optionally, the first transmission module is configured to map the demodulation reference signal to N subcarriers of the DFT-S-OFDM symbol, transform the demodulation reference signal on the N subcarriers to the time domain, and send the signal to the time domain. For the receiving end, the N is the number of subcarriers in the transmission bandwidth.

Optionally, the second transmission module includes:

a first mapping unit, configured to map the phase tracking reference signal to M subcarriers in the N subcarriers of the DFT-S-OFDM symbol;

a second mapping unit, configured to map the T modulation symbols of the data signal to T subcarriers other than the M subcarriers among the N subcarriers;

A transformation unit, configured to transform the phase tracking reference signals on the M subcarriers and the modulation symbols on the T subcarriers to the time domain and send them to the receiving end, wherein the T plus the M is less than or equal to the The N is the number of subcarriers in the transmission bandwidth.

Optionally, the second mapping unit is configured to obtain T parallel modulation symbols after serial-to-parallel conversion of the T modulation symbols of the data signal, and perform discrete Fourier transform on the T parallel modulation symbols to obtain T. output data, and map the T output data to T sub-carriers other than the M sub-carriers among the N sub-carriers; or

The second mapping unit is used for obtaining N parallel modulation symbols after serial-to-parallel conversion of N modulation symbols of the data signal, and performing discrete Fourier transform on the N parallel modulation symbols to obtain N output data, T pieces of output data are selected from the N pieces of output data, and the T pieces of output data are mapped to T pieces of sub-carriers other than the M pieces of sub-carriers among the N pieces of sub-carriers.

The embodiment of the present invention also provides a receiving end, including:

a first receiving module, configured to receive the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimate the channel information of the demodulation reference signal;

a second receiving module, configured to receive the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimate the channel information of the phase tracking reference signal;

a compensation module, configured to compensate the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensated channel information;

A demodulation module for demodulating the data signal using the compensation channel information.

Optionally, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

Optionally, the first receiving module is configured to receive the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, perform frequency domain transformation on the demodulation reference signal, and estimate the demodulation reference signal after the frequency domain transformation. Channel information of the tune reference signal.

Optionally, the second receiving module is configured to receive the phase tracking reference signal and the data signal that are frequency-division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and receive the phase tracking reference signal and the data signal on the DFT-S-OFDM symbol. The received signal is transformed in the frequency domain, and the channel information of the phase tracking reference signal after the frequency domain transformation is estimated.

Optionally, the compensation module is configured to compare the channel information of the phase tracking reference signal with the channel information of the demodulation reference signal to obtain the DFT-S-OFDM where the phase tracking reference signal and the data signal are located. The symbol is relative to the phase change information of the DFT-S-OFDM symbol where the demodulation reference signal is located, and the phase change information is used to compensate the channel information of the demodulation reference signal to obtain compensated channel information.

Optionally, the second receiving module is configured to receive the phase tracking reference signal and the data signal that are frequency-division-multiplexed and transmitted by the transmitting end on multiple DFT-S-OFDM symbols, and receive the phase tracking reference signal and the data signal on the multiple DFT-S-OFDM symbols. Perform frequency domain transformation on the signal received on each DFT-S-OFDM symbol in the S-OFDM symbol, and estimate the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol after the frequency domain transformation;

The compensation module is configured to compare the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol with the channel information of the demodulation reference signal, and obtain the relative value of each DFT-S-OFDM symbol relative to all the DFT-S-OFDM symbols. Describe the phase change information of the DFT-S-OFDM symbol where the demodulation reference signal is located, and use the phase change information corresponding to each DFT-S-OFDM symbol to compensate the channel information of the demodulation reference signal respectively, and obtain each Compensation channel information corresponding to DFT-S-OFDM symbols;

The demodulation module is used for demodulating the respective data signals using the compensation channel information corresponding to each DFT-S-OFDM symbol.

The above-mentioned technical scheme of the present invention has at least the following beneficial effects:

In the embodiment of the present invention, the transmitting end transmits a demodulation reference signal to the receiving end on the DFT-S-OFDM symbol; the transmitting end transmits the phase tracking reference signal to the receiving end on the DFT-S-OFDM symbol by frequency division multiplexing signal and data signal. Since the phase tracking reference signal and the data signal are frequency-division multiplexed in the DFT-S-OFDM symbol, the receiving end can perform channel compensation on the channel information of the demodulation reference signal based on the phase tracking reference signal, so that the compensated channel is used. The information modulates the data signal to reduce the phase noise of the DFT-S-OFDM signal transmission.

Description of drawings

1 is a schematic diagram of a network structure provided by an embodiment of the present invention;

FIG. 2 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of transmission of a reference signal according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a transmission structure of a transmitter according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of transmission of another reference signal provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a transmission structure of another transmitting end provided by an embodiment of the present invention;

FIG. 7 is a flowchart of another method for transmitting a reference signal according to an embodiment of the present invention;

FIG. 8 is a structural diagram of a transmitter according to an embodiment of the present invention;

FIG. 9 is a structural diagram of another transmitting end provided by an embodiment of the present invention;

10 is a structural diagram of a receiving end according to an embodiment of the present invention;

11 is a structural diagram of another transmitting end provided by an embodiment of the present invention;

FIG. 12 is a structural diagram of another receiving end according to an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1, FIG. 1 is a network structure diagram to which an embodiment of the present invention can be applied. As shown in FIG. 1, it includes a sending end 11 and a receiving end 12, wherein the sending end 11 can be understood as a device for transmitting (or sending) data, The receiving end 12 can be understood as a device that receives data. In the drawings, the sending end 11 is the user equipment and the receiving end 12 is the network side device as an example, but in this embodiment of the present invention, the sending end 11 may be the network side device, and when the sending end 11 is the network side device , the receiving end 12 may be a user equipment or a network side device; or when the transmitting end 11 is a user equipment, the receiving end 12 may be a network side device or a user equipment. In addition, in the embodiment of the present invention, the user equipment may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (personal digital assistant, PDA for short), a mobile Internet Device (Mobile Internet Device, MID) ) or a terminal-side device such as a wearable device (Wearable Device), it should be noted that the specific type of the sending end 11 is not limited in the embodiment of the present invention, and the network-side device may be a Transmission Reception Point (TRP, Transmission Reception Point). ), or may be a base station, and the base station may be a macro station, such as an LTE eNB, a 5G NR NB, and the like. Alternatively, the network-side device may be an access point (AP, access point). It should be noted that, in the embodiment of the present invention, the specific type of the network side device is not limited.

Referring to FIG. 2, an embodiment of the present invention provides a method for transmitting a reference signal, as shown in FIG. 2, including the following steps:

201. The transmitting end transmits a demodulation reference signal (De Modulation Reference Signal, DMRS) to the receiving end on the DFT-S-OFDM symbol;

202. The transmitting end transmits a phase tracking reference signal (Phase tracking Reference Signal, PTRS) and a data signal to the receiving end in a frequency division multiplexing manner on the DFT-S-OFDM symbols.

Wherein, in step 201, a demodulation reference signal may be transmitted to the receiving end on one or more DFT-S-OFDM symbols in a certain subframe or a certain time slot (slot), wherein the demodulation reference signal is used for the receiving end Demodulate the data signal.

And step 202 may be to transmit the phase tracking reference signal and the data signal in a frequency division multiplexing manner to the receiving end on one or more DFT-S-OFDM symbols in a certain subframe or a certain time slot. In the same DFT-S-OFDM symbol, one or more subcarriers may transmit phase tracking reference signals, and all other subcarriers may transmit data signals.

Wherein, the DFT-S-OFDM symbol for transmitting the demodulation reference signal and the DFT-S-OFDM symbol for transmitting the frequency division multiplexing transmission phase tracking reference signal and the data signal may be DFT-S symbols in the same subframe or in the same time slot. - OFDM symbols. In addition, in this embodiment of the present invention, the execution order of step 201 and step 202 is not limited. For example, it may be performed simultaneously, or step 202 may be performed first and then step 201, or the reverse may be performed. In the drawings, step 201 is performed first for illustration. In addition, the above data signal may be uplink data, of course, may also be downlink data in some scenarios, which is not limited.

It should be noted that, in this embodiment of the present invention, the phase tracking reference signal is not limited, and the reference signal may be any reference signal capable of tracking the phase change of each DFT-S-OFDM symbol transmitted by the transmitting end, which can be combined with the solution Similar to the tuning reference signal, it is used when transmitting a data signal, and can be transmitted after precoding.

In this embodiment of the present invention, through the above, the demodulation reference signal can be sent to the receiving end, and the phase tracking reference signal and the data signal can be transmitted to the receiving end in a frequency division multiplexing manner, so that the receiving end can decode the demodulation signal based on the phase tracking reference signal. The channel information of the reference signal is adjusted to perform channel compensation, so that the phase noise of the DFT-S-OFDM signal transmission can be reduced by using the compensated channel information to modulate the data signal. The specific process at the receiving end can be as follows:

The receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the demodulation reference signal;

The receiving end receives the phase tracking reference signal and the data signal that are frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the phase tracking reference signal;

The receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information;

The receiving end demodulates the data signal using the compensation channel information.

After receiving the above-mentioned demodulation reference signal, the receiving end can perform channel estimation on it to obtain the channel information of the above-mentioned demodulation reference signal, and after obtaining the above-mentioned phase tracking reference signal, it can perform channel estimation on the phase tracking reference signal to obtain the channel information of the phase tracking reference signal, so that the channel information of the demodulation reference signal can be compensated based on the channel information of the phase tracking reference signal, so as to obtain the compensated channel information and use it to demodulate the above-mentioned data signal. In this way, since the compensation channel information is used to demodulate the data signal, the phase noise can be reduced or even eliminated.

Optionally, in this embodiment of the present invention, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

In this embodiment, frequency division multiplexing of DFT-S-OFDM symbols for transmitting phase tracking reference signals and data signals and DFT-S-OFDM symbols for transmitting modulation reference signals can be realized, so that the receiving end can be used to estimate the phase tracking reference signal and decompose the DFT-S-OFDM symbols. Adjust the channel information of the reference signal to further reduce the phase noise.

In addition, in the embodiment of the present invention, since DFT-S-OFDM symbols are used, the effect of reducing the peak-to-average power ratio (PAPR) can be achieved.

Optionally, in this embodiment of the present invention, the above-mentioned transmitting end transmits a demodulation reference signal to the receiving end on the DFT-S-OFDM symbol, including:

The transmitting end maps the demodulation reference signal to the N subcarriers of the DFT-S-OFDM symbol, transforms the demodulation reference signal on the N subcarriers to the time domain and sends it to the receiving end, wherein the The above N is the number of subcarriers in the transmission bandwidth.

Wherein, transforming the demodulation reference signals on the N subcarriers to the time domain may be transformed to the time domain by using an inverse fast Fourier transform (Inverse Fast Fourier Transform, IFFT) of K points, that is, the solution on the N subcarriers The modulation reference signal is transformed into the time domain by K-point IFFT and sent to the receiving end, where K may be greater than or equal to N, for example: 16 or 32, etc., which is not limited. It should be noted that, in this embodiment of the present invention, it is not limited to use IFFT to perform time-domain transformation, and other transformation methods can be implemented in the same way.

In the receiving end, the receiving end may receive the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, perform frequency domain transformation on the demodulation reference signal, and estimate the demodulation reference signal after frequency domain transformation. Channel information of the signal. Wherein, the above-mentioned frequency domain transformation of the demodulation reference signal may be performed by using K-point Fast Fourier Transform (Fast Fourier Transform, FFT) to perform frequency-domain transformation, that is, the modulation reference signal is transformed into the frequency domain through K-point FFT, and channel estimate to obtain the channel information of the demodulation reference signal.

Optionally, in this embodiment of the present invention, the transmitting end transmits a phase tracking reference signal and a data signal to the receiving end in a frequency division multiplexing manner on DFT-S-OFDM symbols, including:

The transmitting end maps the phase tracking reference signal to M subcarriers in the N subcarriers of the DFT-S-OFDM symbol;

mapping the T modulation symbols of the data signal to T sub-carriers other than the M sub-carriers among the N sub-carriers;

Transform the phase tracking reference signals on the M subcarriers and the modulation symbols on the T subcarriers to the time domain and send them to the receiving end, where the T plus the M is less than or equal to the N, and the N is the number of subcarriers in the transmission bandwidth.

The above-mentioned M subcarriers may be one or more subcarriers. Preferably, the phase tracking reference signal may be mapped to 1 (that is, M=1) subcarriers in the N subcarriers of the DFT-S-OFDM symbol, In this way, the transmission of data signals can be increased to improve the utilization of resources. In addition, when T plus M is less than N, signals other than the phase tracking reference signal and the data signal may be multiplexed in the above-mentioned N subcarriers, so as to improve the flexibility of the system.

In addition, in the embodiment of the present invention, the above-mentioned M sub-carriers may be dispersed in N sub-carriers, that is, one or more non-edge sub-carriers of the N sub-carriers transmit the phase tracking reference signal. Alternatively, the above-mentioned M subcarriers may also be concentrated at the edge of the N subcarriers, that is, one or more edge subcarriers of the N subcarriers transmit the phase tracking reference signal.

In addition, the above-mentioned time-domain transform may also be transformed by using K-point IFFT, which will not be repeated here.

In this embodiment, the receiving end may receive the phase tracking reference signal and the data signal that are frequency-division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and send the received signal on the DFT-S-OFDM symbol. The signal is transformed in the frequency domain, and the channel information of the phase tracking reference signal after the frequency domain transformation is estimated.

Wherein, the frequency domain transformation may be performed by using K-point FFT, and performing channel estimation on the transformed signal to obtain channel information of the phase tracking reference signal after frequency domain transformation. Wherein, the receiving end may use the above manner for each DFT-S-OFDM symbol of the multiplexed phase tracking reference signal and the data signal to obtain the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol.

Optionally, the above-mentioned mapping of the T modulation symbols of the data signal to the T sub-carriers other than the M sub-carriers in the N sub-carriers includes:

The T modulation symbols of the data signal are subjected to serial-to-parallel conversion to obtain T parallel modulation symbols, and a discrete Fourier transform (Discrete Fourier Transform, DFT) is performed on the T parallel modulation symbols to obtain T output data, and the The T output data are mapped to T subcarriers other than the M subcarriers among the N subcarriers; or

After serial-to-parallel conversion of the N modulation symbols of the data signal, N parallel modulation symbols are obtained, and discrete Fourier transform is performed on the N parallel modulation symbols to obtain N output data, among the N output data T pieces of output data are selected, and the T pieces of output data are mapped to T sub-carriers other than the M sub-carriers among the N sub-carriers.

In this embodiment, since the modulation symbols of the data signal are subjected to discrete Fourier transform, a lower peak-to-average power ratio (PAPR) of the data signal is achieved, so as to improve the transmission performance of the data signal. Wherein, the above-mentioned selecting T pieces of output data from the N pieces of output data may be to discard M pieces of output data from the N pieces of output data, and select T pieces of output data.

Optionally, in this embodiment of the present invention, when the receiving end performs compensation on the channel information of the demodulation reference signal, the receiving end may compare the channel information of the phase tracking reference signal with the demodulation reference signal. Compare the channel information of the signal to obtain the phase change information of the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located relative to the DFT-S-OFDM symbol where the demodulation reference signal is located, and use the The phase change information compensates the channel information of the demodulation reference signal to obtain compensated channel information.

Among them, here is a DFT-S-OFDM symbol that transmits the phase tracking reference signal and the data signal by frequency division multiplexing. The phase change information of the DFT-S-OFDM symbol where the demodulation reference signal is located, that is, the phase change caused by the phase noise experienced by the DFT-S-OFDM signal can be obtained. In this way, the compensation channel information obtained by compensating the channel information of the demodulation reference signal using the phase change information, and then using the compensation channel information to demodulate the data signal in the DFT-S-OFDM symbol, can reduce or even eliminate the phase noise to improve system performance. The other DFT-S-OFDM symbols can be demodulated in the same way, which will not be repeated here.

Or the receiving end may receive the phase tracking reference signal and the data signal that are frequency-division multiplexed and transmitted by the transmitting end on multiple DFT-S-OFDM symbols, and send the data signals to each of the multiple DFT-S-OFDM symbols. The signal received on the DFT-S-OFDM symbol is subjected to frequency domain transformation, and the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol after frequency domain transformation is estimated; The channel information of the phase tracking reference signal in the phase tracking reference signal is compared with the channel information of the demodulation reference signal, and the phase of each DFT-S-OFDM symbol relative to the DFT-S-OFDM symbol where the demodulation reference signal is located is obtained. change information, and use the phase change information corresponding to each DFT-S-OFDM symbol to compensate the channel information of the demodulation reference signal respectively to obtain the compensation channel information corresponding to each DFT-S-OFDM symbol; The compensation channel information corresponding to each DFT-S-OFDM symbol demodulates the respective data signals.

Among them, the description is made with multiple DFT-S-OFDM symbols. Of course, in the embodiment of the present invention, it is not limited that the multiple DFT-S-OFDM symbols are performed simultaneously, and may be performed sequentially. The embodiment is not limited.

It should be noted that the various optional implementation manners described above in the embodiments of the present invention may be implemented in combination with each other, or may be implemented independently, which are not limited by the embodiments of the present invention. For example: the following example:

Example 1:

In this example, it is assumed that the transmission bandwidth of the data signal at the transmitting end is N=12 subcarriers, which is illustrated in one time unit (subframe). FIG. 3 shows the subframe configuration of this example.

In this example, the transmitting end transmits DMRS on DFT-S-OFDM symbol 3, as shown in FIG. 3, which is mapped to N=12 subcarriers, and is transformed into time domain by K=16 points IFFT and sent to the receiving end.

And the transmitting end transmits the frequency division multiplexed PTRS and the modulation symbols of the data signal on the remaining DFT-S-OFDM symbols (symbols 1, 2, 4 to 14). The PTRS signal is mapped to M=1 subcarriers, as shown in FIG. 3 , which is located on the band edge subcarrier 1 . 11 data modulation symbols are mapped to sub-carriers 2-12 after 11-point DFT. Each symbol is transformed into the time domain by K=16 point IFFT and sent to the receiver.

Among them, the block diagram of the transmission structure of the transmitting end can be shown in Figure 4. The modulation symbols of the data signal undergo serial-to-parallel conversion. For example, 11 parallel modulation symbols are obtained. These 11 parallel modulation symbols undergo 11-point DFT transformation, and then track the phase with The reference signal is transformed to the time domain through a 16-point IFFT, and then the signal transformed to the time domain undergoes parallel-serial conversion. After the parallel-serial conversion, the signal is added with a cyclic prefix, and then sent to the receiving end through radio frequency.

In this example, each receiving antenna port or antenna unit at the receiving end can receive PTRS signals on DFT-S-OFDM symbols 1, 2 and 4-14, and perform channel estimation. The result (channel information) of the channel estimation of the PTRS located on the DFT-S-OFDM symbol 1 subcarrier k=1 is denoted as P _1,1 .

And each receiving antenna port or antenna unit of the receiving end receives the DMRS signal on the DFT-S-OFDM symbol 3, and performs channel estimation. Denote the result of the channel estimation of the DMRS on DFT-S-OFDM symbol l=3 subcarrier k as H _k,3 .

即P_1,l除以H_k,3。In this way, according to the channel estimation result of the PTRS signal and the channel estimation result of the DMRS signal, the receiving end can estimate that the DFT-S-OFDM symbols (l=1, 2, 4-14) where the PTRS is located are relative to the DFT-S-OFDM symbols (l=1, 2, 4-14) where the DMRS is located. Phase change

That is, P _1,1 divided by H _k,3 .

使用此补偿后的信道估计结果对DFT-S-OFDM符号l上的数据进行解调。In addition, the receiving end can use the estimated phase change on the DFT-S-OFDM symbol 1 to compensate the channel estimation result of the DMRS symbol, and obtain the compensated channel estimation of each subcarrier on the symbol 1.

The data on DFT-S-OFDM symbol 1 is demodulated using this compensated channel estimation result.

Example 2:

In this example, it is assumed that the transmission bandwidth of the data of the transmitting end is N=12 subcarriers, which is described in one time unit (subframe). FIG. 5 shows the subframe configuration of this embodiment.

In this example, the transmitting end can transmit DMRS on DFT-S-OFDM symbol 3, as shown in FIG. 5 , which is mapped to N=12 subcarriers, transformed into time domain by K=16 points IFFT, and sent to the receiving end.

The transmitting end transmits DMRS on DFT-S-OFDM symbol 3, as shown in Figure 5, which is mapped to N=12 subcarriers, and is transformed into the time domain by K=16 points IFFT and sent to the receiving end.

The transmitting end transmits frequency division multiplexed PTRS and data modulation symbols on the remaining DFT-S-OFDM symbols (symbols 1, 2, 4 to 14). The PTRS signal is mapped to M=1 subcarriers, as shown in FIG. 5 , which is located on the subcarrier 6 in the center of the frequency band. After 12 data modulation symbols pass through 12-point DFT, 12 output data are obtained, 1 of which is discarded, and the remaining 11 data are mapped to sub-carriers 1-5 and 7-12 respectively. Each symbol is transformed into the time domain by K=16 point IFFT and sent to the receiver.

The block diagram of the transmission structure of the transmitting end can be shown in Figure 6. The modulation symbols of the data signal undergo serial-to-parallel conversion. For example, 12 parallel modulation symbols are obtained. The 12 parallel modulation symbols undergo 12-point DFT transformation, and 1 of them is discarded. modulation symbols, and then the remaining 11 parallel modulation symbols and the phase tracking reference signal are transformed to the time domain through a 16-point IFFT, and then the signal transformed to the time domain is subjected to parallel-serial conversion, and then the signal is added after parallel-serial conversion. The cyclic prefix is then sent to the receiver via radio frequency.

In this example, each receiving antenna port or antenna unit at the receiving end can receive PTRS signals on DFT-S-OFDM symbols 1, 2 and 4-14, and perform channel estimation. Denote the result of the channel estimation of the PTRS on DFT-S-OFDM symbol 1 subcarrier k=6 as P _6,1 .

Each receiving antenna port or antenna unit at the receiving end receives the DMRS signal on DFT-S-OFDM symbol 3 and performs channel estimation. Denote the result of the channel estimation of the DMRS on DFT-S-OFDM symbol l=3 subcarrier k as H _k,3 .

In this way, the receiving end can estimate the phase of the DFT-S-OFDM symbol (l=1, 2, 4-14) where the PTRS is located relative to the phase of the DMRS symbol based on the channel estimation result of the PTRS signal and the channel estimation result of the DMRS signal. Variety

使用此补偿后的信道估计结果对DFT-S-OFDM符号l上的数据进行解调。Therefore, the receiving end uses the estimated phase change on the DFT-S-OFDM symbol 1 to compensate the channel estimation result of the DMRS symbol, and obtains the compensated channel estimation of each subcarrier on the symbol 1.

The data on DFT-S-OFDM symbol 1 is demodulated using this compensated channel estimation result.

In the embodiment of the present invention, the transmitting end transmits a demodulation reference signal to the receiving end on the DFT-S-OFDM symbol; the transmitting end transmits the phase tracking reference signal to the receiving end on the DFT-S-OFDM symbol by frequency division multiplexing signal and data signal. Since the phase tracking reference signal and the data signal are frequency-division multiplexed in the DFT-S-OFDM symbol, the receiving end can perform channel compensation on the channel information of the demodulation reference signal based on the phase tracking reference signal, so that the compensated channel is used. The information modulates the data signal to reduce the phase noise of the DFT-S-OFDM signal transmission.

Referring to FIG. 7, an embodiment of the present invention provides a method for transmitting a reference signal, as shown in FIG. 7, including the following steps:

701. The receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates channel information of the demodulation reference signal;

702. The receiving end receives the phase tracking reference signal and the data signal that are frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates channel information of the phase tracking reference signal;

703. The receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information;

704. The receiver uses the compensation channel information to demodulate the data signal.

Optionally, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

Optionally, the receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the demodulation reference signal, including:

The receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, performs frequency domain transformation on the demodulation reference signal, and estimates channel information of the demodulation reference signal after frequency domain transformation.

Optionally, the receiving end receives the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the phase tracking reference signal, including:

The receiving end receives the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and performs frequency domain transformation on the signal received on the DFT-S-OFDM symbol , and estimate the channel information of the phase tracking reference signal after frequency domain transformation.

Optionally, the receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information, including:

The receiving end compares the channel information of the phase tracking reference signal with the channel information of the demodulation reference signal, and obtains the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located relative to the solution. The phase change information of the DFT-S-OFDM symbol where the modulation reference signal is located, and the phase change information is used to compensate the channel information of the demodulation reference signal to obtain compensated channel information.

Optionally, the receiving end receives the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the phase tracking reference signal, including:

The receiving end receives the phase tracking reference signal and the data signal that are frequency-division multiplexed and transmitted by the transmitting end on a plurality of DFT-S-OFDM symbols, and compares each DFT signal in the plurality of DFT-S-OFDM symbols - Perform frequency domain transformation on the signal received on the S-OFDM symbol, and estimate the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol after the frequency domain transformation;

The receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information, including:

The receiving end compares the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol with the channel information of the demodulation reference signal, and obtains that each DFT-S-OFDM symbol is relative to the solution. The phase change information of the DFT-S-OFDM symbol where the reference signal is located, and the phase change information corresponding to each DFT-S-OFDM symbol is used to compensate the channel information of the demodulation reference signal, to obtain each DFT-S-OFDM symbol. Compensation channel information corresponding to the S-OFDM symbol;

The receiving end uses the compensation channel information to demodulate the data signal, including:

The respective data signals are demodulated using the compensation channel information corresponding to each DFT-S-OFDM symbol.

It should be noted that, this embodiment is an implementation of the receiving end corresponding to the embodiment shown in FIG. 2 , and reference may be made to the relevant description of the embodiment shown in FIG. 2 for the specific implementation. The example will not be repeated. In this embodiment, the influence of phase noise can also be reduced.

Referring to FIG. 8, an embodiment of the present invention provides a sending end. As shown in FIG. 8, a sending end 800 includes:

a first transmission module 801, configured to transmit a demodulation reference signal to a receiving end on the DFT-S-OFDM symbol;

The second transmission module 802 is configured to transmit the phase tracking reference signal and the data signal to the receiving end in a frequency division multiplexing manner on the DFT-S-OFDM symbol.

Optionally, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

Optionally, the first transmission module 801 is configured to map the demodulation reference signal to N subcarriers of the DFT-S-OFDM symbol, transform the demodulation reference signal on the N subcarriers to the time domain and send to the receiving end, wherein the N is the number of subcarriers in the transmission bandwidth.

Optionally, as shown in FIG. 9 , the second transmission module 802 includes:

a first mapping unit 8021, configured to map the phase tracking reference signal to M subcarriers in the N subcarriers of the DFT-S-OFDM symbol;

a second mapping unit 8022, configured to map the T modulation symbols of the data signal to T subcarriers other than the M subcarriers in the N subcarriers;

A transformation unit 8023, configured to transform the phase tracking reference signals on the M subcarriers and the modulation symbols on the T subcarriers to the time domain and send them to the receiving end, where the T plus the M is less than or equal to The N, where N is the number of subcarriers in the transmission bandwidth.

Optionally, the second mapping unit 8022 is configured to obtain T parallel modulation symbols after serial-to-parallel conversion of the T modulation symbols of the data signal, and perform discrete Fourier transform on the T parallel modulation symbols to obtain: T pieces of output data, mapping the T pieces of output data to T sub-carriers other than the M sub-carriers among the N sub-carriers; or

The second mapping unit 8022 is used to obtain N parallel modulation symbols after serial-to-parallel conversion of the N modulation symbols of the data signal, and perform discrete Fourier transform on the N parallel modulation symbols to obtain N output data , selecting T output data from the N output data, and mapping the T output data to T subcarriers other than the M subcarriers among the N subcarriers.

It should be noted that, in this embodiment, the above-mentioned transmitting end 800 may be a transmitting end of any implementation manner in the method embodiments in the embodiments of the present invention, and any implementation manner of the transmitting end in the method embodiments in the present embodiment may be used by this implementation. The above-mentioned sending end 800 in the example is implemented and achieves the same beneficial effects, which will not be repeated here.

Referring to FIG. 10 , an embodiment of the present invention provides a receiving end. As shown in FIG. 10 , the receiving end 1000 includes:

A first receiving module 1001, configured to receive a demodulation reference signal transmitted by a transmitting end on a DFT-S-OFDM symbol, and estimate channel information of the demodulation reference signal;

The second receiving module 1002 is configured to receive the phase tracking reference signal and the data signal that are frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimate the channel information of the phase tracking reference signal;

Compensation module 1003, configured to compensate the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensated channel information;

A demodulation module 1004, configured to demodulate the data signal by using the compensation channel information.

Optionally, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

Optionally, the first receiving module 1001 is configured to receive the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, perform frequency domain transformation on the demodulation reference signal, and estimate the frequency domain transformed signal. Channel information of the demodulation reference signal.

Optionally, the second receiving module 1002 is configured to receive the phase tracking reference signal and the data signal that are frequency-division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and receive the phase tracking reference signal and the data signal on the DFT-S-OFDM symbol. The frequency domain transform is performed on the received signal, and the channel information of the phase tracking reference signal after the frequency domain transform is estimated.

Optionally, the compensation module 1003 is configured to compare the channel information of the phase tracking reference signal with the channel information of the demodulation reference signal to obtain the DFT-S-S-channel where the phase tracking reference signal and the data signal are located. The phase change information of the OFDM symbol relative to the DFT-S-OFDM symbol where the demodulation reference signal is located, and the phase change information is used to compensate the channel information of the demodulation reference signal to obtain compensated channel information.

Optionally, the second receiving module 1002 is configured to receive the phase tracking reference signal and the data signal that are frequency-division multiplexed and transmitted by the transmitting end on multiple DFT-S-OFDM symbols, and receive the phase tracking reference signal and the data signal on the multiple DFT-S-OFDM symbols. - Perform frequency domain transformation on the signal received on each DFT-S-OFDM symbol in the S-OFDM symbol, and estimate the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol after the frequency domain transformation;

The compensation module 1003 is configured to compare the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol with the channel information of the demodulation reference signal, and obtain each DFT-S-OFDM symbol relative to the channel information of the demodulation reference signal. The phase change information of the DFT-S-OFDM symbol where the demodulation reference signal is located, and the phase change information corresponding to each DFT-S-OFDM symbol is used to compensate the channel information of the demodulation reference signal respectively, to obtain each Compensation channel information corresponding to each DFT-S-OFDM symbol;

The demodulation module 1004 is configured to demodulate the respective data signals using the compensation channel information corresponding to each DFT-S-OFDM symbol.

It should be noted that, in this embodiment, the above-mentioned receiving end 1000 may be a receiving end of any implementation in the method embodiments in the embodiments of the present invention, and any implementation of the receiving end in the method embodiments in the embodiments of the present invention may be implemented by this implementation. The above-mentioned receiving end 1000 in the example realizes and achieves the same beneficial effects, which will not be repeated here.

Referring to FIG. 11 , an embodiment of the present invention provides another structure of a transmitting end. The transmitting end includes: a processor 1100, a transceiver 1110, a memory 1120, a user interface 1130, and a bus interface, wherein:

The processor 1100 is configured to read the program in the memory 1120 and perform the following processes:

Transmit the demodulation reference signal to the receiving end on the DFT-S-OFDM symbol through the transceiver 1110;

The phase tracking reference signal and the data signal are transmitted to the receiving end in a frequency division multiplexed manner on the DFT-S-OFDM symbols through the transceiver 1110 .

The transceiver 1110 is used for receiving and transmitting data under the control of the processor 1100 .

In FIG. 11 , the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 1100 and various circuits of memory represented by memory 1120 linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 1110 may be a number of elements, including a transmitter and a receiver, that provide a means for communicating with various other devices over a transmission medium. For different user equipments, the user interface 1130 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

Optionally, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

Optionally, the transmitting the demodulation reference signal to the receiving end on the DFT-S-OFDM symbol includes:

Map the demodulation reference signal to N subcarriers of the DFT-S-OFDM symbol, transform the demodulation reference signal on the N subcarriers to the time domain and send it to the receiver, where N is the transmission The number of subcarriers in the bandwidth.

Optionally, the transmitting the phase tracking reference signal and the data signal to the receiving end in a frequency division multiplexing manner on the DFT-S-OFDM symbol, including:

mapping the phase tracking reference signal to M subcarriers among the N subcarriers of the DFT-S-OFDM symbol;

mapping the T modulation symbols of the data signal to T sub-carriers other than the M sub-carriers among the N sub-carriers;

Transform the phase tracking reference signals on the M subcarriers and the modulation symbols on the T subcarriers to the time domain and send them to the receiving end, where the T plus the M is less than or equal to the N, and the N is the number of subcarriers in the transmission bandwidth.

Optionally, the mapping of the T modulation symbols of the data signal to the T subcarriers other than the M subcarriers in the N subcarriers includes:

After serial-to-parallel conversion of the T modulation symbols of the data signal, T parallel modulation symbols are obtained, and discrete Fourier transform is performed on the T parallel modulation symbols to obtain T output data, and the T output data are mapped to T subcarriers other than the M subcarriers among the N subcarriers; or

After serial-to-parallel conversion of the N modulation symbols of the data signal, N parallel modulation symbols are obtained, and discrete Fourier transform is performed on the N parallel modulation symbols to obtain N output data, among the N output data T pieces of output data are selected, and the T pieces of output data are mapped to T sub-carriers other than the M sub-carriers among the N sub-carriers.

It should be noted that, in this embodiment, the above-mentioned sending end may be a sending end of any implementation manner in the method embodiments in this embodiment of the present invention, and any implementation of the transmitting end in the method embodiments in this embodiment of the present invention may be used in this embodiment. The above-mentioned sending end in , and achieve the same beneficial effects, will not be repeated here.

Referring to FIG. 12 , the structure of a receiving end is shown. The receiving end includes: a processor 1200, a transceiver 1210, a memory 1220, a user interface 1230 and a bus interface, wherein:

The processor 1200 is configured to read the program in the memory 1220 and perform the following processes:

Receive the demodulation reference signal transmitted by the transmitter on the DFT-S-OFDM symbol by the transceiver 1210, and estimate the channel information of the demodulation reference signal;

Receive, through the transceiver 1210, the phase tracking reference signal and the data signal that are frequency-division multiplexed and transmitted by the transmitter on the DFT-S-OFDM symbol, and estimate the channel information of the phase tracking reference signal;

Compensating the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensated channel information;

The data signal is demodulated using the compensation channel information.

The transceiver 1210 is used for receiving and transmitting data under the control of the processor 1200, and the transceiver 1210 includes the above-mentioned antenna unit or antenna port.

In FIG. 12 , the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 1200 and various circuits of memory represented by memory 1220 linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 1210 may be a number of elements, including a transmitter and a receiver, that provide a means for communicating with various other devices over a transmission medium. For different user equipments, the user interface 1230 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 in performing operations.

Optionally, the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located and the DFT-S-OFDM symbol where the demodulation reference signal is located are different symbols.

Optionally, the receiving and transmitting end transmits the demodulation reference signal on the DFT-S-OFDM symbol, and estimates the channel information of the demodulation reference signal, including:

The demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol is received, and the demodulation reference signal is subjected to frequency domain transformation to estimate the channel information of the demodulation reference signal after the frequency domain transformation.

Optionally, the receiving the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimating the channel information of the phase tracking reference signal, including:

Receive the phase tracking reference signal and data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, perform frequency domain transformation on the signal received on the DFT-S-OFDM symbol, and estimate the frequency The domain-transformed phase tracks the channel information of the reference signal.

Optionally, performing compensation on the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information, including:

Comparing the channel information of the phase tracking reference signal with the channel information of the demodulation reference signal to obtain the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located relative to where the demodulation reference signal is located The phase change information of the DFT-S-OFDM symbol is obtained, and the phase change information is used to compensate the channel information of the demodulation reference signal to obtain compensated channel information.

Optionally, the receiving the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimating the channel information of the phase tracking reference signal, including:

Receive the phase tracking reference signal and the data signal frequency-division multiplexed and transmitted by the transmitting end on a plurality of DFT-S-OFDM symbols, and send each DFT-S-OFDM symbol in the plurality of DFT-S-OFDM symbols The signal received on the symbol is subjected to frequency domain transformation, and the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol after the frequency domain transformation is estimated;

Compensating the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensated channel information, including:

Compare the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol with the channel information of the demodulation reference signal, and obtain the location where each DFT-S-OFDM symbol is relative to the demodulation reference signal. The phase change information of the DFT-S-OFDM symbol is obtained, and the phase change information corresponding to each DFT-S-OFDM symbol is used to compensate the channel information of the demodulation reference signal, and each DFT-S-OFDM symbol is obtained. Corresponding compensation channel information;

The demodulating the data signal using the compensation channel information includes:

The respective data signals are demodulated using the compensation channel information corresponding to each DFT-S-OFDM symbol.

It should be noted that, in this embodiment, the above-mentioned receiving end may be a receiving end of any implementation mode in the method embodiments in the embodiments of the present invention, and any implementation mode of the receiving end in the method embodiments in the embodiments of the present invention may be used in this embodiment. It is realized by the above receiving end in , and achieves the same beneficial effects, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included individually, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or can be implemented in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above software functional unit is stored in a storage medium, and includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute part of the steps of the transceiving method described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM for short), Random Access Memory (RAM for short), magnetic disk or CD, etc. that can store program codes medium.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (18)

1. A method for transmitting a reference signal, comprising: The transmitting end transmits the demodulation reference signal to the receiving end on the DFT-S-OFDM symbol of the discrete Fourier transform spread spectrum orthogonal frequency division multiplexing access technology; The transmitting end transmits the phase tracking reference signal and the data signal to the receiving end in a frequency division multiplexing manner on the DFT-S-OFDM symbol; Wherein, the transmitting end transmits the phase tracking reference signal and the data signal to the receiving end in a frequency division multiplexing manner on the DFT-S-OFDM symbol, including: The transmitting end maps the phase tracking reference signal to M subcarriers in the N subcarriers of the DFT-S-OFDM symbol; mapping the T modulation symbols of the data signal to T sub-carriers other than the M sub-carriers among the N sub-carriers; Transform the phase tracking reference signals on the M subcarriers and the modulation symbols on the T subcarriers to the time domain and send them to the receiving end, where the T plus the M is less than or equal to the N, and the N is the number of subcarriers in the transmission bandwidth. 2. The method of claim 1, wherein the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located is different from the DFT-S-OFDM symbol where the demodulation reference signal is located symbol. 3. The method of claim 1, wherein the transmitting end transmits a demodulation reference signal to the receiving end on the DFT-S-OFDM symbol, comprising: The transmitting end maps the demodulation reference signal to the N subcarriers of the DFT-S-OFDM symbol, transforms the demodulation reference signal on the N subcarriers to the time domain and sends it to the receiving end, wherein the The above N is the number of subcarriers in the transmission bandwidth. 4. The method according to claim 1, wherein the mapping of the T modulation symbols of the data signal to the T subcarriers other than the M subcarriers in the N subcarriers comprises: After serial-to-parallel conversion of the T modulation symbols of the data signal, T parallel modulation symbols are obtained, and discrete Fourier transform is performed on the T parallel modulation symbols to obtain T output data, and the T output data are mapped to T subcarriers other than the M subcarriers among the N subcarriers; or After serial-to-parallel conversion of the N modulation symbols of the data signal, N parallel modulation symbols are obtained, and discrete Fourier transform is performed on the N parallel modulation symbols to obtain N output data, among the N output data T pieces of output data are selected, and the T pieces of output data are mapped to T sub-carriers other than the M sub-carriers among the N sub-carriers. 5. A method for transmitting a reference signal, comprising: The receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the demodulation reference signal; The receiving end receives the phase tracking reference signal and the data signal that are frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the phase tracking reference signal; The receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information; The receiver uses the compensation channel information to demodulate the data signal; Wherein, the receiving end receives the phase tracking reference signal and the data signal that are frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates the channel information of the phase tracking reference signal, including: The receiving end receives the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and performs frequency domain transformation on the signal received on the DFT-S-OFDM symbol , and estimate the channel information of the phase tracking reference signal after frequency domain transformation. 6. The method of claim 5, wherein the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located is different from the DFT-S-OFDM symbol where the demodulation reference signal is located symbol. 7. The method according to claim 5, wherein the receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimates channel information of the demodulation reference signal, comprising: : The receiving end receives the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, performs frequency domain transformation on the demodulation reference signal, and estimates channel information of the demodulation reference signal after frequency domain transformation. 8. The method according to any one of claims 5-7, wherein the receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain Compensation channel information, including: The receiving end compares the channel information of the phase tracking reference signal with the channel information of the demodulation reference signal, and obtains the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located relative to the solution. The phase change information of the DFT-S-OFDM symbol where the modulation reference signal is located, and the phase change information is used to compensate the channel information of the demodulation reference signal to obtain compensated channel information. 9. The method according to any one of claims 5-7, wherein the receiving end receives the phase tracking reference signal and data that are frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol signal, and estimate the channel information of the phase tracking reference signal, including: The receiving end receives the phase tracking reference signal and the data signal that are frequency-division multiplexed and transmitted by the transmitting end on a plurality of DFT-S-OFDM symbols, and compares each DFT signal in the plurality of DFT-S-OFDM symbols - Perform frequency domain transformation on the signal received on the S-OFDM symbol, and estimate the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol after the frequency domain transformation; The receiving end compensates the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensation channel information, including: The receiving end compares the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol with the channel information of the demodulation reference signal, and obtains that each DFT-S-OFDM symbol is relative to the solution. The phase change information of the DFT-S-OFDM symbol where the reference signal is located, and the phase change information corresponding to each DFT-S-OFDM symbol is used to compensate the channel information of the demodulation reference signal, to obtain each DFT-S-OFDM symbol. Compensation channel information corresponding to the S-OFDM symbol; The receiving end uses the compensation channel information to demodulate the data signal, including: The respective data signals are demodulated using the compensation channel information corresponding to each DFT-S-OFDM symbol. 10. A transmitting end, characterized in that, comprising: a first transmission module, configured to transmit the demodulation reference signal to the receiving end on the DFT-S-OFDM symbol; a second transmission module, configured to transmit the phase tracking reference signal and the data signal to the receiving end in a frequency division multiplexing manner on the DFT-S-OFDM symbol; Wherein, the second transmission module includes: a first mapping unit, configured to map the phase tracking reference signal to M subcarriers in the N subcarriers of the DFT-S-OFDM symbol; a second mapping unit, configured to map the T modulation symbols of the data signal to T subcarriers other than the M subcarriers among the N subcarriers; A transformation unit, configured to transform the phase tracking reference signals on the M subcarriers and the modulation symbols on the T subcarriers to the time domain and send them to the receiving end, wherein the T plus the M is less than or equal to the The N is the number of subcarriers in the transmission bandwidth. 11. The transmitter according to claim 10, wherein the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located is different from the DFT-S-OFDM symbol where the demodulation reference signal is located symbol. 12. The transmitter according to claim 10, wherein the first transmission module is configured to map the demodulation reference signal to N subcarriers of the DFT-S-OFDM symbol, and map the N subcarriers to the N subcarriers. The demodulation reference signal is transformed into the time domain and sent to the receiving end, where N is the number of subcarriers in the transmission bandwidth. 13. The transmitter according to claim 10, wherein the second mapping unit is configured to obtain T parallel modulation symbols after serial-to-parallel conversion of T modulation symbols of the data signal, and perform serial-to-parallel conversion on the T modulation symbols of the data signal. Perform discrete Fourier transform on parallel modulation symbols to obtain T output data, and map the T output data to T subcarriers other than the M subcarriers among the N subcarriers; or The second mapping unit is used for obtaining N parallel modulation symbols after serial-to-parallel conversion of N modulation symbols of the data signal, and performing discrete Fourier transform on the N parallel modulation symbols to obtain N output data, T pieces of output data are selected from the N pieces of output data, and the T pieces of output data are mapped to T pieces of sub-carriers other than the M pieces of sub-carriers among the N pieces of sub-carriers. 14. A receiver, characterized in that, comprising: a first receiving module, configured to receive the demodulation reference signal transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimate the channel information of the demodulation reference signal; a second receiving module, configured to receive the phase tracking reference signal and the data signal frequency division multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and estimate the channel information of the phase tracking reference signal; a compensation module, configured to compensate the channel information of the demodulation reference signal based on the channel information of the phase tracking reference signal to obtain compensated channel information; a demodulation module for demodulating the data signal using the compensation channel information; The second receiving module is configured to receive the phase tracking reference signal and the data signal that are frequency-division-multiplexed and transmitted by the transmitting end on the DFT-S-OFDM symbol, and receive on the DFT-S-OFDM symbol The frequency-domain transformed signal is transformed, and the channel information of the phase-tracking reference signal after frequency domain transformation is estimated. 15. The receiver according to claim 14, wherein the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located is different from the DFT-S-OFDM symbol where the demodulation reference signal is located symbol. 16. The receiver according to claim 14, wherein the first receiver module is configured to receive the demodulation reference signal transmitted by the transmitter on the DFT-S-OFDM symbol, and convert the demodulation reference signal to the DFT-S-OFDM symbol. Perform frequency domain transformation to estimate channel information of the demodulation reference signal after frequency domain transformation. 17. The receiver according to any one of claims 14-16, wherein the compensation module is configured to compare the channel information of the phase tracking reference signal with the channel information of the demodulation reference signal , obtain the phase change information of the DFT-S-OFDM symbol where the phase tracking reference signal and the data signal are located relative to the DFT-S-OFDM symbol where the demodulation reference signal is located, and use the phase change information to The channel information of the demodulation reference signal is compensated to obtain compensated channel information. 18. The receiving end according to any one of claims 14-16, wherein the second receiving module is configured to receive frequency division multiplexing transmission by the transmitting end on multiple DFT-S-OFDM symbols phase tracking reference signal and data signal, and frequency domain transform the signal received on each DFT-S-OFDM symbol in the plurality of DFT-S-OFDM symbols, and estimate each DFT after frequency domain transformation - channel information of the phase tracking reference signal in the S-OFDM symbol; The compensation module is configured to compare the channel information of the phase tracking reference signal in each DFT-S-OFDM symbol with the channel information of the demodulation reference signal, and obtain the relative value of each DFT-S-OFDM symbol relative to all the DFT-S-OFDM symbols. Describe the phase change information of the DFT-S-OFDM symbol where the demodulation reference signal is located, and use the phase change information corresponding to each DFT-S-OFDM symbol to compensate the channel information of the demodulation reference signal respectively, and obtain each Compensation channel information corresponding to DFT-S-OFDM symbols; The demodulation module is used for demodulating the respective data signals using the compensation channel information corresponding to each DFT-S-OFDM symbol.

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