CN115037422A - Method, device and equipment for sending and receiving pilot signals - Google Patents

Abstract

The present invention provides a method, device and device for transmitting and receiving pilot signals. The method includes: acquiring a target frequency band and characteristic information corresponding to the target frequency band; determining, according to the target frequency band and the characteristic information corresponding to the target frequency band The pilot frequency configuration of the target frequency band; sending a first pilot signal on the target frequency band according to the pilot frequency configuration of the target frequency band. The scheme of the present invention can determine the pilot frequency configuration according to the corresponding relationship between the characteristic information and the frequency band, so as to reduce the pilot frequency overhead while ensuring the accuracy of channel estimation.

Description

A method, device and equipment for transmitting and receiving pilot signal

technical field

The present invention relates to the field of communication technologies, and in particular, to a method, apparatus and device for sending and receiving pilot signals.

Background technique

To achieve channel estimation, pilot insertion is an effective technique to assist channel estimation. There are mainly three pilot design schemes widely used at present: (1) block pilot (block pilot); (2) comb pilot (comb pilot); (3) grid pilot (grid pilot).

1. Block pilot (block pilot), the design idea of the block pilot structure is to send a pilot signal every certain time. Its pilot structure is arranged as shown in Figure 1, which is characterized in that at a certain moment, all subcarrier channels transmit pilot signals. The system can estimate the channel response at the moment through the pilot structure, and the channel response values at other moments need to be interpolated with the values at two adjacent moments according to certain rules. When the channel is time-varying, the time interval for sending pilot signals must be smaller than the coherence time, so as to keep up with the speed of channel change. The advantage of using block pilots is that when performing channel estimation, only interpolation is required in the time domain, and no operation in the frequency domain is required, and the computational complexity is low. Channel estimation based on block pilots is also called time domain channel estimation. According to the time domain sampling theorem, block pilot patterns are only suitable for slow time-varying channels.

2. Comb pilot, a schematic diagram of the structure of the comb pilot is shown in FIG. 2 . Contrary to the design of the block pilot structure, the comb-shaped pilot structure transmits a pilot signal once at a certain frequency. On the selected frequency, all times are used to transmit the pilot signal, on other frequencies there is no pilot signal. The comb pilot uses the signal response of a selected frequency to estimate the response of the signal at that frequency, and then interpolates the part where no pilot data is added to achieve channel estimation. The commonly used interpolation methods include linear interpolation and nonlinear interpolation. The linear interpolation method has a simple algorithm structure, but after the interpolation, the estimation of the channel is relatively rough; while the nonlinear interpolation, the general algorithm structure is more complicated, but the channel estimation is relatively rough. estimates are better. Channel estimation based on comb pilots is also called frequency domain channel estimation. It can estimate fast time-varying channel parameters more accurately, which is beneficial to overcome the adverse effects of fast channel fading.

3. Grid pilot (grid pilot), the grid pilot structure is to send pilot signals at certain intervals in the time domain and the frequency domain, respectively. As shown in FIG. 3 , the lattice pilots are distributed in a grid shape, and channel estimation can only be performed after several OFDM symbols (usually one time slot) are continuously stored. Lattice pilot not only preserves the advantages of setting time-varying channels, but also takes into account the rationality of spectrum resource occupation, and also improves the characteristics of being too sensitive to frequency selective fading, but its own defects are also obvious. When the number and the number of pilots are large, the lattice pilot distribution is difficult to realize, which is not conducive to real-time estimation of the channel. The lattice pilot structure needs to perform interpolation operations in the time-frequency domain when performing channel estimation. Compared with block pilots and comb pilots, its computational complexity is higher. The commonly used two-dimensional pilot patterns mainly include lattice pilots, rectangular pilots, diamond pilots, and hexagonal pilots.

The existing technical solutions are mainly fixed pilot signal intervals. If the pilot signal interval is too small, the number of subcarriers used for user data transmission is reduced, thereby reducing the resource efficiency of the entire communication system; If it is too large, the information used for channel estimation is too little, which reduces the accuracy of channel estimation.

In actual communication, due to the frequency response characteristics of transceiver devices, the response information of some communication systems is correlated with frequency changes. Since the response information of different frequencies is different, the use of a fixed pilot density/interval will lead to different channel estimation accuracy, that is, when the pilot density/interval is the same, the higher the signal-to-noise ratio, the more accurate the channel estimation, and the lower the signal-to-noise ratio. Estimates are less precise.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a method, apparatus and device for sending and receiving a pilot signal. The scheme of the present invention can determine the pilot frequency according to the corresponding relationship between the characteristic information and the frequency band, and reduce the pilot frequency while ensuring the accuracy of channel estimation.

For solving the above-mentioned technical problems, the technical scheme of the present invention is as follows:

A method for sending a pilot signal, applied to a sending end device, the method comprising:

obtaining a target frequency band and feature information corresponding to the target frequency band;

determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band;

A first pilot signal is sent on the target frequency band according to the pilot configuration of the target frequency band.

Optionally, obtaining a target frequency band and feature information corresponding to the target frequency band, including:

directly obtain the characteristic information corresponding to each frequency band in the target frequency band; or,

directly acquiring the first characteristic information corresponding to the partial frequency band in the frequency band set, and obtaining the second characteristic information corresponding to the target frequency band according to the first characteristic information corresponding to the partial frequency band; or,

Send a second pilot signal to the receiving end device on at least one frequency band in the frequency band set, receive third feature information fed back by the receiving end device that is obtained by performing channel estimation according to the second pilot signal, The third characteristic information acquires the fourth characteristic information corresponding to the target frequency band.

Optionally, the feature information includes at least one of the following:

Signal-to-noise ratio SNR;

Signal to Interference and Noise Ratio SINR;

channel response information;

Channel Quality Indication CQI;

Reference signal received strength RSRP;

Reference signal reception quality RSRQ;

Received Signal Strength Indication RSSI;

Device frequency response information.

Optionally, the pilot configuration includes: the number of pilots, the density of pilots, the interval of pilots, or the pattern of pilots.

Optionally, determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band, including:

selecting at least one frequency band within the frequency band set as the reference frequency band;

determining the pilot configuration of the reference frequency band;

The pilot configuration of the target frequency band is determined according to the relationship between the characteristic information corresponding to the reference frequency band and the characteristic information corresponding to the target frequency band, and the pilot frequency configuration of the reference frequency band.

Optionally, the reference frequency band is at least one frequency band with the largest or smallest characteristic information, or a frequency band numbered with a predefined value, or a frequency band with the largest or smallest number, or a number that is a preset value configured by the transmitting end device. frequency band.

Optionally, determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band, including:

obtaining a correspondence between a feature information range and a pilot configuration, where the feature information range includes at least one feature information range, and the pilot configuration includes at least one pilot configuration;

If the characteristic information corresponding to the target frequency band falls within one of the characteristic information ranges, the pilot configuration corresponding to the characteristic information range is determined as the pilot configuration corresponding to the target frequency band.

An embodiment of the present invention also provides a method for receiving a pilot signal, which is applied to a receiving end device, and the method includes:

receiving the first pilot signal sent by the transmitting end device according to the pilot configuration; the pilot configuration is determined according to the target frequency band and feature information corresponding to the target frequency band;

Channel estimation is performed according to the first pilot signal to obtain a channel estimation result.

Optionally, the method for receiving a pilot signal further includes: acquiring the pilot configuration.

Optionally, obtaining the pilot configuration includes:

According to the feature information corresponding to the target frequency band measured by the receiving end device, and according to the target frequency band and the corresponding relationship between the target frequency band and the feature information, determine the pilot frequency configuration; or,

Receive the corresponding relationship between the target frequency band and the feature information of the receiving end device sent by the sending end device, and determine the pilot configuration according to the corresponding relationship between the target frequency band and the feature information; or,

Obtain the corresponding relationship between the feature information range configured by the transmitting end device and the pilot configuration, and determine the pilot configuration corresponding to the target frequency band according to the corresponding relationship and the obtained feature information of the target frequency band, and the feature information range includes at least one The range of feature information, the pilot configuration includes at least one pilot configuration; or,

Obtain the pilot configuration corresponding to the target frequency band configured by the transmitting end device.

An embodiment of the present invention further provides an apparatus for sending a pilot signal, which is applied to a sending end device, and the apparatus includes:

a transceiver module for acquiring a target frequency band and characteristic information corresponding to the target frequency band;

a processing module, configured to determine the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band;

The transceiver module is further configured to send a first pilot signal on the target frequency band according to the pilot configuration.

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

a transceiver, configured to acquire a target frequency band and feature information corresponding to the target frequency band;

a processor, configured to determine a pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band;

The transceiver is further configured to transmit a first pilot signal on the target frequency band according to the pilot configuration.

An embodiment of the present invention further provides an apparatus for receiving a pilot signal, which is applied to a receiving end device, and the apparatus includes:

a transceiver module, configured to receive a first pilot signal sent by a transmitter device according to a pilot configuration; the pilot configuration is determined according to a target frequency band and feature information corresponding to the target frequency band;

A processing module, configured to perform channel estimation according to the first pilot signal to obtain a channel estimation result.

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

a transceiver, configured to receive a first pilot signal sent by a transmitter device according to a pilot configuration; the pilot configuration is determined according to a target frequency band and feature information corresponding to the target frequency band;

The processor is configured to perform channel estimation according to the first pilot signal to obtain a channel estimation result.

The present invention provides a communication device, comprising: a processor and a memory storing a computer program, and the computer program executes the above-mentioned method when the computer program is run by the processor.

The present invention also provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the above-described method.

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

According to the solution of the present invention, the target frequency band and the characteristic information corresponding to the target frequency band are acquired; the pilot frequency configuration is determined according to the frequency band and the characteristic information; the first pilot frequency signal is sent on the frequency band according to the pilot frequency configuration. The solution of the present invention has low implementation complexity, can allocate pilot signal intervals according to the corresponding relationship between the first response information and the carrier frequency band, and reduce pilot overhead while ensuring the accuracy of channel estimation.

Description of drawings

1 is a pilot pattern diagram of a block pilot;

Fig. 2 is the pilot pattern diagram of comb pilot;

3 is a pilot pattern diagram of a lattice pilot;

4 is a schematic flowchart of a method for sending a pilot signal according to an embodiment of the present invention;

Fig. 5 is the trend diagram that the signal-to-noise ratio changes with the carrier frequency band in the specific embodiment 1 of the present invention;

6 is a pilot pattern diagram obtained in the specific embodiment 1 of the present invention;

Fig. 7 is the trend diagram that the signal-to-noise ratio changes with the carrier frequency band in the specific embodiment 2 of the present invention;

8 is a pilot pattern diagram obtained in the specific embodiment 2 of the present invention;

Fig. 9 is the trend diagram that the signal-to-noise ratio changes with the carrier frequency band in the specific embodiment 3 of the present invention;

10 is a pilot pattern diagram obtained in the specific embodiment 3 of the present invention;

11 is a schematic flowchart of a method for receiving a pilot signal according to an embodiment of the present invention;

FIG. 12 is a schematic block diagram of a module of an apparatus for sending a pilot signal according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be more thoroughly understood, and will fully convey the scope of the present invention to those skilled in the art.

As shown in FIG. 4 , an embodiment of the present invention provides a method for sending a pilot signal, which is applied to a sending end device. The method includes:

Step 41, obtain target frequency band and characteristic information corresponding to described target frequency band;

Step 42, according to the target frequency band and the characteristic information corresponding to the target frequency band, determine the pilot frequency configuration of the target frequency band;

Step 43: Send a first pilot signal on the target frequency band according to the pilot configuration of the target frequency band.

In this embodiment, the target frequency band is a subset of a frequency band set, the frequency band set may be equal to the target frequency band, and the pilot frequency configuration may include: pilot frequency or pilot frequency density or pilot frequency interval or pilot frequency pattern; Correspondence and can be used to determine the relevant information of the pilot configuration corresponding to the frequency band; the scheme of this embodiment determines the pilot configuration of the target frequency band by acquiring the target frequency band and the characteristic information corresponding to the target frequency band. Send the first pilot signal to the receiving end. Therefore, the pilot configuration can be allocated according to the corresponding relationship between the characteristic information and the carrier frequency band, and the pilot overhead can be reduced while ensuring the accuracy of channel estimation.

In an optional embodiment of the present invention, the pilot frequency interval is x/M*N, where M is the number of carriers contained in a frequency band, N is the number of symbols contained in a time slot, and x is the number of carriers in the frequency band. number of pilots.

In an optional embodiment of the present invention, step 41 may include:

Directly obtain the characteristic information corresponding to each frequency band in the frequency band set. For example, when the transmitting end device pre-stores the characteristic information corresponding to each frequency band, the characteristic information corresponding to the pre-stored first frequency band can be directly obtained, or the transmitting end device can directly obtain the characteristic information corresponding to the first frequency band. Obtain characteristic information by measuring the transmitting device; or,

The first characteristic information corresponding to the partial frequency band in the frequency band set is directly obtained, and according to the first characteristic information corresponding to the partial frequency band, for example, when the transmitting end device pre-stores the characteristic information corresponding to each frequency band, the pre-stored first characteristic information can be directly obtained. The first characteristic information corresponding to the frequency band, or the first characteristic information is obtained by measuring the transmitting device at the transmitting end; the second characteristic information corresponding to the target frequency band is obtained. For example, the transmitting end device can, according to the functional relationship between the characteristic information and the frequency band, After obtaining the first characteristic information corresponding to part of the frequency band, the characteristic information corresponding to the target frequency band (that is, the second characteristic information) can be determined according to the functional relationship, and the pilot frequency configuration of the target frequency band can be determined according to the second characteristic information corresponding to the target frequency band. ;or,

Send a second pilot signal to the receiving end device on at least one frequency band in the frequency band set, receive third feature information fed back by the receiving end device that is obtained by performing channel estimation according to the second pilot signal, The third characteristic information obtains the fourth characteristic information corresponding to the target frequency band; here, the second pilot signal is used for the receiving end device to perform channel estimation and obtain the third characteristic information corresponding to the frequency band that transmits the second pilot signal; wherein, the transmitting end The device can send the second pilot signal on each frequency band in the frequency band set, and obtain the third characteristic information corresponding to the frequency band, and the third characteristic information corresponding to the target frequency band is the fourth characteristic information; The second pilot signal is sent on a part of the frequency band in the device to obtain the third characteristic information corresponding to the part of the frequency band, and further according to the functional relationship between the third characteristic information and the frequency band, the fourth characteristic information corresponding to the target frequency band is determined. The pilot configuration of the target frequency band is determined according to the fourth characteristic information corresponding to the target frequency band.

In the foregoing embodiment of the present invention, the feature information body may include at least one of the following: signal-to-noise ratio SNR; signal-to-interference and noise ratio SINR; channel response information; channel quality indicator CQI; reference signal received strength RSRP; reference signal received quality RSRQ; Received signal strength indicates RSSI; device frequency response information.

In an optional embodiment of the present invention, the foregoing step 42 may include:

Step 421, select at least one frequency band in the frequency band set as the reference frequency band;

Step 422, determining the pilot configuration of the reference frequency band;

Step 423: Determine the pilot configuration of the target frequency band according to the relationship between the characteristic information corresponding to the reference frequency band and the characteristic information corresponding to the target frequency band, and the pilot frequency configuration of the reference frequency band.

Among them, the pilot frequency configuration is: the number of pilot frequencies included in a frequency band in a time slot;

The reference frequency band is at least one frequency band with the largest or smallest characteristic information, or a frequency band numbered with a predefined value, or a frequency band with the largest or smallest number, or a frequency band with a preset number configured by the transmitting end device.

In an optional embodiment of the present invention, the foregoing step 42 may include:

Obtain the correspondence between the feature information range and the pilot configuration, the feature information range includes at least one feature information range, the pilot configuration includes at least one pilot configuration, and each feature information range corresponds to a pilot configuration, here The pilot configuration of can be the pilot density;

If the characteristic information corresponding to the target frequency band falls within one of the characteristic information ranges, the pilot configuration corresponding to the characteristic information range is determined as the pilot configuration corresponding to the target frequency band.

The characteristic information range here is determined by a lower threshold and a lower upper threshold, and the characteristic information corresponding to the frequency band falls between the lower threshold and the upper threshold of one of the characteristic information ranges, then the frequency band can be determined according to the characteristic information range. the corresponding pilot density.

The implementation process of the above method is described below in conjunction with specific embodiments:

In a specific embodiment 1, the characteristic information is the signal-to-noise ratio (SNR), the second pilot signal is sent in the frequency band set, the channel pre-estimation is performed using the second pilot signal configuration, and the signal of each frequency band in the frequency band set is obtained. Noise ratio, select a reference frequency band and design a pilot frequency configuration according to the reference frequency band, further send a first pilot signal according to the pilot frequency configuration, and the receiver performs channel estimation. The implementation process is as follows:

1-1) Obtain the linear relationship between the received signal-to-noise ratio and the carrier frequency (ie the frequency band or the frequency in the frequency band).

In an implementation manner, the transmitting end device sends the second pilot signal, and after receiving the second pilot signal, the receiving end device uses channel estimation to obtain the signal-to-noise ratio corresponding to the frequency band; or, the transmitting end device informs the receiving end device of the frequency band. Corresponding relationship with signal-to-noise ratio;

In another implementation manner, the transmitting end device knows that there is a linear relationship between the signal-to-noise ratio and the frequency band, and according to the second pilot signal, the channel estimation obtains a fitting function of the relationship between the frequency band and the signal-to-noise ratio.

1-2) Select the reference frequency band, design the pilot frequency density of the reference frequency band, and design the pilot frequency density corresponding to other frequency bands according to the reference frequency band.

First, the sub-carriers are divided into multiple sub-carrier frequency bands according to actual needs, each frequency band may contain one or more adjacent sub-carriers, one frequency band is selected as the reference frequency band, and the pilot frequency density is set for the reference frequency band according to the system communication requirements; wherein, The reference frequency band can be the sub-carrier frequency band with the lowest signal-to-noise ratio or the carrier frequency band with the highest signal-to-noise ratio, or other suitable carrier frequency bands;

Secondly, according to the pilot density of the reference frequency band, use the relationship fitting function of the received signal-to-noise ratio with the subcarrier to calculate the pilot density of other frequency bands;

Then, the respective pilot densities are determined according to the pilot densities of each frequency band. In order to reduce the computational complexity, under the condition that the accuracy of the channel estimation is not seriously affected, the pilot densities can be appropriately adjusted in the pilot pattern design so that different frequency bands can be The pilot signals are concentrated in multiple identical time slots;

Further, when there are multiple receiving end devices, the transmitting end device can adjust the pilot pattern for multiple receiving end devices. According to the pilot patterns of multiple receivers, a final pilot pattern is determined and sent to each receiver device, and the receiver device performs channel estimation according to the pilot signals.

As shown in Figure 5, in order to obtain the variation trend of signal-to-noise ratio with carrier frequency through pilot channel estimation, pilots cannot be allocated one by one during pilot design, and the 16 carrier frequencies are divided into 4 frequency bands, each frequency band It contains 4 carriers, and takes the 4th carrier frequency of each frequency band as the center frequency of the frequency band to represent the entire frequency band, among which the reference frequency band is frequency band 1, and the frequency information is used as a data point to calculate the linear relationship, and calculate the frequency of the frequency band. pilot density.

It can be seen from Figure 5 that the signal-to-noise ratio has a linear relationship with the change trend of the carrier frequency. In the figure, carrier a, carrier frequency b, carrier frequency c and carrier frequency d are the representatives of each frequency band 1, frequency band 2, frequency band 3 and frequency band 4 respectively. The carrier frequency, according to the data in the figure, can be calculated to obtain a linear relationship between the signal-to-noise ratio and the frequency band: y=-5x+25, where x represents the number of frequency bands, and y represents the signal-to-noise ratio.

According to this formula, the signal-to-noise ratio corresponding to each frequency band can be obtained, and the four sets of data are (1, 20), (2, 15), (3, 10), (4, 5) respectively. The frequency band with the highest signal-to-noise ratio is selected as the reference frequency band, and the pilot frequency density of this frequency band is set to 3.

In the embodiment of the present invention, the pilot density is defined as: the number of pilots on a frequency band in a time slot containing 7 symbols.

Definition Pilot density is inversely proportional to SNR: Pilot density _{other frequencies} SNR _{reference frequency}

Combined with the data content of Figure 5, the reference frequency band is frequency band 1, the signal-to-noise ratio of the reference frequency is 20, the signal-to-noise ratio of the sought frequency is n, the pilot frequency density of the sought frequency is m, and the frequency of the reference frequency band is 3, according to The above formula can be obtained: 20/n=m/3, that is, the pilot frequency density m=60/n of other frequencies.

According to this formula, the number of pilots in other frequency bands is calculated and rounded to obtain the number of pilots in the 2nd, 3rd, and 4th bands as 4, 6, and 12. The number of pilots obtained according to the pilot density and the signal-to-noise ratio can be obtained. The pattern is shown in Figure 6. The vertical axis in Figure 6 is the frequency domain, and the horizontal axis is the time domain. Band 1, Band 2, Band 3, and Band 4 on the vertical axis correspond to Bands 1 to 4 in Figure 5, respectively. .

In a specific embodiment 2, the characteristic information is the signal-to-noise ratio (SNR), the frequency band interval is divided, two or more reference frequency bands are selected, the second pilot signal is sent on the reference frequency band, and the channel pre-estimation is performed at the receiving end. The pre-estimation information obtains the signal-to-noise ratio of the reference frequency band, determines the pilot frequency corresponding to the reference frequency band, determines the pilot frequency density of other frequency bands according to the linear relationship, designs the pilot frequency pattern, transmits the pilot frequency signal, and performs channel estimation at the receiving end. The implementation process is as follows:

2-1) Divide the frequency band interval, select the reference frequency band, and obtain the reference frequency band and its corresponding signal-to-noise ratio relationship.

Divide the sub-carriers into multiple sub-carrier frequency bands according to actual needs, wherein each frequency band may contain one or more adjacent carriers; select a reference frequency band, send a second pilot signal on the reference frequency band, and the receiving end device estimates the frequency through the channel The relationship between the frequency of the reference frequency band and the signal-to-noise ratio is obtained.

2-2) Determine the pilot frequency of the reference frequency band, determine the pilot frequency of other frequency bands according to the linear relationship and the pilot frequency of the reference frequency band, and design the pilot frequency pattern.

First, the receiving end device feeds back the correspondence between the signal-to-noise ratio and the frequency to the transmitting end device, and the transmitting end device sets the pilot density for the reference frequency band according to the system communication requirements;

Then, according to the pilot density of the reference frequency band, use the linear feature to calculate the pilot density of other frequency bands;

Secondly, the pilot pattern design is carried out according to the number of pilots in each frequency band. In order to reduce the computational complexity, the pilot density can be appropriately adjusted during the design of the pilot pattern so that the pilots of different frequency bands have no serious impact on the accuracy of the channel estimation. The frequency signals are concentrated in multiple identical time slots;

Further, when there are multiple receiving end devices, the transmitting end device can adjust the pilot pattern for multiple receiving end devices. According to the pilot patterns of multiple receivers, a final pilot pattern is determined and sent to each receiver device, and the receiver device performs channel estimation according to the pilot signals.

It can be seen from FIG. 7 that the total number of carriers is 12, the carriers are divided into 4 frequency bands, and each frequency band has 3 carriers. The reference frequency bands are frequency band 1 and frequency band 4. The pilot signal is placed in the reference frequency band and sent, and the receiver uses channel estimation to obtain the signal-to-noise ratio data of the reference frequency band. The channel estimation method in this embodiment 2 is based on the reference frequency band (frequency band 1 and frequency band 1 and Band 4), the signal-to-noise ratio in Band 1 and Band 4 has a linear relationship with the band, and the number of pilots of the two reference bands is determined according to the communication requirements by using the method of equal difference. It is assumed that the number of pilots in the first band is two and the number of pilots in the fourth band is eight. According to the linear relationship, the number of pilots in the second and third frequency bands can be obtained as 4 and 6, respectively. The resulting pilot pattern is shown in Figure 8. The vertical axis in Figure 8 is the frequency domain, and the horizontal axis is the time domain. Band 1, Band 2, Band 3, and Band 4 on the vertical axis correspond to the bands in Figure 7, respectively. 1 to 4.

In a specific embodiment 3, the characteristic information is the signal-to-noise ratio (SNR), the frequency band interval is divided, two or more reference frequency bands are selected, the second pilot signal is sent in the reference frequency band, and the channel pre-estimation is performed at the receiving end. The estimated information obtains the signal-to-noise ratio value of the reference frequency band, obtains the correlation function, and determines the pilot frequency of each frequency band according to the received pilot frequency and the corresponding table of signal-to-noise ratio.

3-1) Divide the frequency band interval, select the reference frequency band, and obtain the reference frequency band and its corresponding signal-to-noise ratio relationship.

Divide the sub-carriers into multiple sub-carrier frequency bands according to actual needs, wherein each frequency band may include one or more adjacent carriers;

The reference frequency band is selected, the second pilot signal is sent on the reference frequency band, and the receiving end device obtains the relationship between the frequency and the signal-to-noise ratio of the reference frequency band through channel estimation.

3-2) Calculate the signal-to-noise ratio of other frequency bands according to the linear relationship between the signal-to-noise ratio of the reference frequency band and the frequency, determine the pilot frequency of each frequency band according to the corresponding relationship between the pilot frequency density and the signal-to-noise ratio obtained from the transmitting end, and design the pilot frequency pattern .

Knowing the reference frequency band and its corresponding signal-to-noise ratio, it is known that the signal-to-noise ratio and frequency have a linear relationship, and a function can be constructed to obtain the functional relationship according to the reference frequency band data;

According to the functional relationship, the signal-to-noise ratio of other frequency bands can be calculated, and the receiving end feeds back the corresponding relationship between the frequency band and the signal-to-noise ratio to the transmitting end device;

The transmitting end device determines the pilot density of each frequency band according to the corresponding relationship between the pilot density and the signal-to-noise ratio, and the relationship between the pilot density and the signal-to-noise ratio;

The pilot pattern is designed according to the pilot density of each frequency band, and the final pilot design pattern is obtained. The transmitter sends the pilot signal and the corresponding relationship between the pilot density and the signal-to-noise ratio. The receiver confirms the pilot density and designs the pilot pattern according to the corresponding relationship between the pilot density and the signal-to-noise ratio. The pilot pattern is fed back to the receiving end device, and the receiving end sends pilot frequencies for channel estimation, or only the corresponding relationship between the frequency band and the signal-to-noise ratio is fed back to the transmitting end device, and the transmitting end device according to the preset pilot frequency density and pattern correspondence, Confirm the pilot frequency and pattern and send the pilot frequency. The receiver performs channel estimation based on the pilot frequency signal.

As can be seen from Figure 9, assuming that the total number of carriers is 12, the carriers are divided into 4 frequency bands, each frequency band has 3 carriers, and the third carrier frequency of each frequency band is taken as the center frequency of the frequency band to represent the entire frequency band, and this frequency Information is calculated as a linear relationship as data points. The reference frequency bands are frequency band 1 and frequency band 4. The pilot signal is placed in the reference frequency band and sent, and the receiver uses channel estimation to obtain the signal-to-noise ratio data of the reference frequency band. A linear expression is obtained from the data obtained from the reference frequency band: y=-3.5x+20. where x is the number of frequency bands and y is the signal-to-noise ratio. According to this formula, the signal-to-noise ratio corresponding to each frequency band can be obtained, and the four sets of data are (1, 16.5), (2, 13), (3, 9.5), (4, 6) respectively. Using the look-up table, according to the signal-to-noise ratio (feature information range) and the pilot density correspondence table given by the transmitting end device, as shown in Table 1, it is calculated and determined that the pilot density of the four frequency bands is 2, 4 , 8, 8. The feature information range here includes an upper limit threshold and a lower limit threshold, such as [0,5) in Table 1 below, where 0 is the lower limit threshold of the feature information range, and 5 is the upper limit threshold of the feature information range. Correspondence table, the finally obtained pilot pattern is shown in Figure 10, the vertical axis in Figure 10 is the frequency domain, the horizontal axis is the time domain, and the frequency band 1, frequency band 2, frequency band 3 and frequency band 4 on the vertical axis correspond to are bands 1 to 4 in Figure 9.

SNR/DB 0 or less [0,5) [5,10) [10,15) [15,20) 20 or more pilot density not adopted 16 8 4 2 0

Table 1

The pilot signal transmission method according to the embodiment of the present invention is applied to the transmitting end device and the receiving end device respectively. By acquiring the target frequency band and the characteristic information corresponding to the target frequency band, the pilot frequency configuration corresponding to the target frequency band is determined, and the pilot frequency configuration corresponding to the target frequency band can be determined based on the target frequency band. The pilot frequency configuration corresponding to the frequency band sends a pilot frequency signal to the receiving end on the target frequency band, and the receiving end receives the pilot frequency signal and performs channel estimation to obtain a channel estimation result. The present invention can determine the pilot frequency according to the corresponding relationship between the characteristic information and the frequency band, and reduce the pilot frequency overhead while ensuring the accuracy of channel estimation.

As shown in FIG. 11 , the present invention also provides a method for receiving a pilot signal, which is applied to a receiving end device, and the method includes:

Step 111, receiving the first pilot signal sent by the transmitting end device according to the pilot configuration; the pilot configuration is determined according to the target frequency band and feature information corresponding to the target frequency band;

Step 112: Perform channel estimation according to the first pilot signal to obtain a channel estimation result.

The method for receiving the pilot signal, further comprising:

Step 113: Obtain the pilot density.

This embodiment is a method for sending a pilot signal at a receiving end device, by receiving the pilot signal and the pilot density, and performing channel estimation on the pilot signal to obtain an estimation result. The estimation result can be finally used to realize CSI (Channel State Information, channel state information) measurement, demodulation of channels for transmitting information such as data channel/control channel.

Further, the receiving end device obtains the pilot frequency density, including:

According to the characteristic information corresponding to the frequency band measured by the receiving end device, and according to the corresponding relationship between the frequency band and the characteristic information, determine the pilot frequency configuration;

Or, receive the corresponding relationship between the frequency band of the receiving end device and the feature information sent by the transmitting end device, and determine the pilot configuration according to the corresponding relationship between the frequency band and the feature information; or,

Obtain the correspondence between the characteristic information range configured by the transmitting end device and the pilot density, and determine the pilot configuration corresponding to the frequency band according to the correspondence and the acquired characteristic information of the frequency band, and the characteristic information range includes at least one characteristic information range , the pilot density includes at least one pilot density, and each feature information range corresponds to a pilot configuration; or,

Obtain the pilot configuration corresponding to the frequency band configured by the transmitting end device.

In the method for receiving a pilot signal according to the embodiment of the present invention, after receiving the pilot signal, the entire process of receiving the pilot signal is realized by performing channel estimation on the pilot signal to obtain a channel estimation result. It should be noted here that when the receiving end device receives the pilot signal, it also needs to receive the pilot signal according to the pilot frequency. The method of obtaining the pilot frequency by the receiving end device is the same as that of the transmitting end device. I won't go into details here.

As shown in FIG. 12 , an embodiment of the present invention further provides an apparatus 120 for sending a pilot signal, which is applied to a sending end device, and the apparatus includes:

a transceiver module 121, configured to acquire a target frequency band and feature information corresponding to the target frequency band;

a processing module 122, configured to determine the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band;

The transceiver module is further configured to send a first pilot signal on the target frequency band according to the pilot frequency configuration of the target frequency band.

Optionally, obtaining a target frequency band and feature information corresponding to the target frequency band, including:

directly obtain the characteristic information corresponding to each frequency band in the target frequency band; or,

directly acquiring the first characteristic information corresponding to the partial frequency band in the frequency band set, and obtaining the second characteristic information corresponding to the target frequency band according to the first characteristic information corresponding to the partial frequency band; or,

Send a second pilot signal to the receiving end device on at least one frequency band in the frequency band set, receive third feature information fed back by the receiving end device that is obtained by performing channel estimation according to the second pilot signal, The third characteristic information acquires the fourth characteristic information corresponding to the target frequency band.

Optionally, the feature information includes at least one of the following: signal-to-noise ratio SNR; signal-to-interference and noise ratio SINR; channel response information; channel quality indicator CQI; reference signal received strength RSRP; reference signal received quality RSRQ; received signal strength Indicates RSSI; device frequency response information.

Optionally, the pilot configuration includes: the number of pilots, the density of pilots, the interval of pilots, or the pattern of pilots.

Optionally, determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band, including:

selecting at least one frequency band within the frequency band set as the reference frequency band;

determining the pilot configuration of the reference frequency band;

The pilot configuration of the target frequency band is determined according to the relationship between the characteristic information corresponding to the reference frequency band and the characteristic information corresponding to the target frequency band, and the pilot frequency configuration of the reference frequency band.

Optionally, the reference frequency band is at least one frequency band with the largest or smallest characteristic information, or a frequency band numbered with a predefined value, or a frequency band with the largest or smallest number, or a number that is a preset value configured by the transmitting end device. frequency band.

Optionally, determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band, including:

obtaining a correspondence between a feature information range and a pilot configuration, where the feature information range includes at least one feature information range, and the pilot configuration includes at least one pilot configuration;

If the characteristic information corresponding to the target frequency band falls within one of the characteristic information ranges, the pilot configuration corresponding to the characteristic information range is determined as the pilot configuration corresponding to the target frequency band.

It should be noted that the device is a device corresponding to the above-mentioned method for sending a pilot signal applied to a transmitting-end device, and all implementations in the above-mentioned method embodiments of the transmitting-end device are applicable to the embodiments of the device, The same technical effect can also be achieved.

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

a transceiver, configured to acquire a target frequency band and feature information corresponding to the target frequency band;

a processor, configured to determine a pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band;

The transceiver is further configured to send a first pilot signal on the target frequency band according to the pilot frequency configuration of the target frequency band.

Optionally, obtaining a target frequency band and feature information corresponding to the target frequency band, including:

directly obtain the characteristic information corresponding to each frequency band in the target frequency band; or,

directly acquiring the first characteristic information corresponding to the partial frequency band in the frequency band set, and obtaining the second characteristic information corresponding to the target frequency band according to the first characteristic information corresponding to the partial frequency band; or,

Send a second pilot signal to the receiving end device on at least one frequency band in the frequency band set, receive third feature information fed back by the receiving end device that is obtained by performing channel estimation according to the second pilot signal, The third characteristic information acquires the fourth characteristic information corresponding to the target frequency band.

Optionally, the feature information includes at least one of the following: signal-to-noise ratio SNR; signal-to-interference and noise ratio SINR; channel response information; channel quality indicator CQI; reference signal received strength RSRP; reference signal received quality RSRQ; received signal strength Indicates RSSI; device frequency response information.

Optionally, the pilot configuration includes: the number of pilots, the density of pilots, the interval of pilots, or the pattern of pilots.

Optionally, determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band, including:

selecting at least one frequency band within the frequency band set as the reference frequency band;

determining the pilot configuration of the reference frequency band;

The pilot configuration of the target frequency band is determined according to the relationship between the characteristic information corresponding to the reference frequency band and the characteristic information corresponding to the target frequency band, and the pilot frequency configuration of the reference frequency band.

Optionally, the reference frequency band is at least one frequency band with the largest or smallest characteristic information, or a frequency band numbered with a predefined value, or a frequency band with the largest or smallest number, or a number that is a preset value configured by the transmitting end device. frequency band.

Optionally, determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band, including:

Obtain a correspondence between a range of feature information and a pilot configuration, where the range of feature information includes at least one range of feature information, and the pilot configuration includes at least one pilot configuration

If the characteristic information corresponding to the target frequency band falls within one of the characteristic information ranges, the pilot configuration corresponding to the characteristic information range is determined as the pilot configuration corresponding to the target frequency band.

It should be noted that the sending end device is a sending end device corresponding to the above-mentioned method applied to the sending end device, and all implementations in the above method embodiments of the sending end device are applicable to the embodiments of the sending end device, The same technical effect can also be achieved.

The present invention also provides a device for receiving a pilot signal, which is applied to a receiving end device, and the device includes:

a transceiver module, configured to receive a first pilot signal sent by a transmitter device according to a pilot configuration; the pilot configuration is determined according to a target frequency band and feature information corresponding to the target frequency band;

A processing module, configured to perform channel estimation according to the first pilot signal to obtain a channel estimation result.

Optionally, the processing module is further configured to acquire the pilot configuration.

Optionally, obtaining the pilot configuration includes:

According to the feature information corresponding to the target frequency band measured by the receiving end device, and according to the target frequency band and the corresponding relationship between the target frequency band and the feature information, determine the pilot frequency configuration; or,

Receive the corresponding relationship between the target frequency band and the feature information of the receiving end device sent by the sending end device, and determine the pilot configuration according to the corresponding relationship between the target frequency band and the feature information; or,

Obtain the corresponding relationship between the feature information range configured by the transmitting end device and the pilot configuration, and determine the pilot configuration corresponding to the target frequency band according to the corresponding relationship and the obtained feature information of the target frequency band, and the feature information range includes at least one The range of feature information, the pilot configuration includes at least one pilot configuration; or, obtain the pilot configuration corresponding to the target frequency band configured by the transmitting end device.

It should be noted that this device is a device corresponding to the above-mentioned method applied to the receiving-end device, and all the implementations in the above-mentioned method embodiments of the receiving-end device are applicable to the embodiments of the device, and can also achieve the same technology Effect.

The present invention also provides a receiving end device, comprising:

a transceiver, configured to receive a first pilot signal sent by a transmitter device according to a pilot configuration; the pilot configuration is determined according to a target frequency band and feature information corresponding to the target frequency band;

The processor is configured to perform channel estimation according to the first pilot signal to obtain a channel estimation result.

Optionally, the processor is further configured to: acquire the pilot configuration.

Optionally, obtaining the pilot configuration includes:

According to the feature information corresponding to the target frequency band measured by the receiving end device, and according to the target frequency band and the corresponding relationship between the target frequency band and the feature information, determine the pilot frequency configuration; or,

Receive the corresponding relationship between the target frequency band and the feature information of the receiving end device sent by the sending end device, and determine the pilot configuration according to the corresponding relationship between the target frequency band and the feature information; or,

Obtain the corresponding relationship between the feature information range configured by the transmitting end device and the pilot configuration, and determine the pilot configuration corresponding to the target frequency band according to the corresponding relationship and the obtained feature information of the target frequency band, and the feature information range includes at least one The range of feature information, the pilot configuration includes at least one pilot configuration; or, obtain the pilot configuration corresponding to the target frequency band configured by the transmitting end device.

It should be noted that the receiving-end device is a receiving-end device corresponding to the above-mentioned method applied to the receiving-end device, and all implementations in the above-mentioned method embodiments of the receiving-end device are applicable to the embodiments of the receiving-end device, The same technical effect can also be achieved.

An embodiment of the present invention also provides a communication device, comprising: a processor and a memory storing a computer program, the computer program executing the above method when the processor is run. All implementation manners in the foregoing method embodiment are applicable to this embodiment, and the same technical effect can also be achieved.

Embodiments of the present invention also provide a computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method as described above. All implementation manners in the foregoing method embodiment are applicable to this embodiment, and the same technical effect can also be achieved.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the embodiments provided by the present invention, it should be understood that the disclosed apparatus and method 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.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.

In addition, it should be pointed out that, in the apparatus and method of the present invention, obviously, each component or each step can be decomposed and/or recombined. These disaggregations and/or recombinations should be considered as equivalents of the present invention. Also, the steps of performing the above-mentioned series of processes can naturally be performed in chronological order in the order described, but need not necessarily be performed in chronological order, and some steps can be performed in parallel or independently of each other. Those of ordinary skill in the art can understand that all or any steps or components of the method and device of the present invention can be implemented in any computing device (including a processor, storage medium, etc.) or a network of computing devices in hardware, firmware, etc. , software or a combination thereof, which can be realized by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

Accordingly, the objects of the present invention can also be achieved by running a program or set of programs on any computing device. The computing device may be a known general purpose device. Therefore, the object of the present invention can also be achieved only by providing a program product containing program code for implementing the method or apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any known storage medium or any storage medium developed in the future. It should also be pointed out that, in the device and method of the present invention, obviously, each component or each step can be decomposed and/or recombined. These disaggregations and/or recombinations should be considered as equivalents of the present invention. Also, the steps of executing the above-described series of processes can naturally be executed in chronological order in the order described, but need not necessarily be executed in chronological order. Certain steps may be performed in parallel or independently of each other.

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 (16)

1. A method for sending a pilot signal, characterized in that, applied to a transmitting end device, the method comprising: obtaining a target frequency band and feature information corresponding to the target frequency band; determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band; A first pilot signal is sent on the target frequency band according to the pilot configuration of the target frequency band. 2. The method for sending a pilot signal according to claim 1, wherein acquiring a target frequency band and characteristic information corresponding to the target frequency band comprises: directly obtain the characteristic information corresponding to each frequency band in the target frequency band; or, directly acquiring the first characteristic information corresponding to the partial frequency band in the frequency band set, and obtaining the second characteristic information corresponding to the target frequency band according to the first characteristic information corresponding to the partial frequency band; or, Send a second pilot signal to the receiving end device on at least one frequency band in the frequency band set, receive third feature information fed back by the receiving end device that is obtained by performing channel estimation according to the second pilot signal, The third characteristic information acquires the fourth characteristic information corresponding to the target frequency band. 3. The method for sending a pilot signal according to claim 1, wherein the characteristic information comprises at least one of the following: Signal-to-noise ratio SNR; Signal to Interference and Noise Ratio SINR; channel response information; Channel Quality Indication CQI; Reference signal received strength RSRP; Reference signal reception quality RSRQ; Received Signal Strength Indication RSSI; Device frequency response information. 4 . The method for sending a pilot signal according to claim 1 , wherein the pilot configuration comprises: the number of pilots, the density of pilots, the interval of pilots, or the pattern of pilots. 5 . 5. The method for sending a pilot signal according to claim 1, wherein determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band, comprising: selecting at least one frequency band within the frequency band set as the reference frequency band; determining the pilot configuration of the reference frequency band; The pilot configuration of the target frequency band is determined according to the relationship between the characteristic information corresponding to the reference frequency band and the characteristic information corresponding to the target frequency band, and the pilot frequency configuration of the reference frequency band. 6. The method for sending a pilot signal according to claim 5, wherein the reference frequency band is at least one frequency band with the maximum or minimum characteristic information, or a frequency band numbered as a predefined value, or a maximum number or The smallest frequency band, or the frequency band whose number is the preset value configured by the sender device. 7. The method for sending a pilot signal according to claim 1, wherein determining the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band, comprising: obtaining a correspondence between a feature information range and a pilot configuration, where the feature information range includes at least one feature information range, and the pilot configuration includes at least one pilot configuration; If the characteristic information corresponding to the target frequency band falls within one of the characteristic information ranges, the pilot configuration corresponding to the characteristic information range is determined as the pilot configuration corresponding to the target frequency band. 8. A method for receiving a pilot signal, characterized in that, applied to a receiving end device, the method comprising: receiving the first pilot signal sent by the transmitting end device according to the pilot configuration; the pilot configuration is determined according to the target frequency band and feature information corresponding to the target frequency band; Channel estimation is performed according to the first pilot signal to obtain a channel estimation result. 9. The method for receiving a pilot signal according to claim 8, further comprising: Obtain the pilot configuration. 10. The method for receiving a pilot signal according to claim 9, wherein obtaining the pilot configuration comprises: According to the feature information corresponding to the target frequency band measured by the receiving end device, and according to the target frequency band and the corresponding relationship between the target frequency band and the feature information, determine the pilot frequency configuration; or, Receive the corresponding relationship between the target frequency band and the feature information of the receiving end device sent by the sending end device, and determine the pilot configuration according to the corresponding relationship between the target frequency band and the feature information; or, Obtain the corresponding relationship between the feature information range configured by the transmitting end device and the pilot configuration, and determine the pilot configuration corresponding to the target frequency band according to the corresponding relationship and the obtained feature information of the target frequency band, and the feature information range includes at least one The range of feature information, the pilot configuration includes at least one pilot configuration; or, Obtain the pilot configuration corresponding to the target frequency band configured by the transmitting end device. 11. An apparatus for sending a pilot signal, characterized in that it is applied to a sending end device, the apparatus comprising: a transceiver module for acquiring a target frequency band and characteristic information corresponding to the target frequency band; a processing module, configured to determine the pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band; The transceiver module is further configured to send a first pilot signal on the target frequency band according to the pilot configuration. 12. A transmitting end device, characterized in that, comprising: a transceiver, configured to acquire a target frequency band and feature information corresponding to the target frequency band; a processor, configured to determine a pilot configuration of the target frequency band according to the target frequency band and characteristic information corresponding to the target frequency band; The transceiver is further configured to transmit a first pilot signal on the target frequency band according to the pilot configuration. 13. An apparatus for receiving a pilot signal, characterized in that, applied to a receiving end device, the apparatus comprising: a transceiver module, configured to receive a first pilot signal sent by a transmitter device according to a pilot configuration; the pilot configuration is determined according to a target frequency band and feature information corresponding to the target frequency band; A processing module, configured to perform channel estimation according to the first pilot signal to obtain a channel estimation result. 14. A receiving end device, characterized in that, comprising: a transceiver, configured to receive a first pilot signal sent by a transmitter device according to a pilot configuration; the pilot configuration is determined according to a target frequency band and feature information corresponding to the target frequency band; The processor is configured to perform channel estimation according to the first pilot signal to obtain a channel estimation result. 15. A communication device, comprising: a processor and a memory storing a computer program, when the computer program is run by the processor, executes the method according to any one of claims 1 to 7 or 8 to 8 10. The method of any one. 16. A computer-readable storage medium, characterized by storing instructions that, when the instructions are executed on a computer, cause the computer to execute the method according to any one of claims 1 to 7 or any one of 8 to 10 the method described.

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