CN103516447A - Multi-antenna signal merging method and network side equipment - Google Patents

Abstract

The embodiment of the invention discloses a multi-antenna signal combination method and network side equipment, which are applied in the technical field of communication. In the multi-antenna signal combining method of this embodiment, the network side device will obtain the signal quality measurement values of the network side device receiving the signal transmitted by the user equipment on multiple antennas, and determine the signal quality according to the difference between the signal quality measurement values and the preset strategy. The combination method of signals received on multiple antennas includes in the preset strategy: the corresponding relationship between the range of the difference between the signal quality measurement values and the combination method; then the signals received on multiple antennas are combined according to the determined combination method . In this way, according to the quality of the signal transmitted by the user equipment actually received by the network side equipment, an appropriate combination method can be selected to combine the signals received by the network side equipment on multiple antennas, so that the user equipment and the network can be taken into account when combining multi-antenna signals. The actual communication performance between the side devices, and the signal detection reliability obtained after the final combination is high.

Description

A multi-antenna signal combining method and network side equipment

technical field

The invention relates to the field of communication technology, in particular to a multi-antenna signal combination method and network side equipment.

Background technique

In the existing mobile communication system, when the user equipment transmits the uplink signal on the uplink transmission channel, the network side equipment can combine the received uplink signals on multiple antennas, for example, in the Universal Mobile Communication System (Universal Mobile Telecommunications System, UMTS), the network side equipment can combine multi-antenna signals through selective combination of decoding results, antenna signal multipath combination or log likelihood ratio (Log likelihood ratio, LLR) stream soft information combination and other combination methods. However, the above-mentioned combination method for multi-antenna signals is statically configured on the network side device, and does not take into account factors such as actual communication performance between the user equipment and the network device, so that the combined signal is not very accurate.

Contents of the invention

Embodiments of the present invention provide a method for combining multi-antenna signals and a network-side device, so that the actual communication performance between the user equipment and the network-side device is considered when combining multi-antenna signals, and the accuracy of signal detection obtained after combining is improved.

The first aspect of the embodiment of the present invention provides a multi-antenna signal combining method, including:

Respectively acquiring signal quality measurement values of signals transmitted by the user equipment received by the network side equipment on multiple antennas;

Determine the combination mode of the signals received on the multiple antennas according to the difference between the signal quality measurement values of the signals received on the multiple antennas and a preset strategy, and the preset strategy includes: a difference between the signal quality measurement values The corresponding relationship between the range of the difference and the combination method;

Combine signals received on multiple antennas according to the determined combining manner.

In the first possible implementation manner of the first aspect of the embodiments of the present invention, before acquiring the signal quality measurement values of the signal quality transmitted by the user equipment received by the network side equipment on multiple antennas, further includes:

If the signals received on the multiple antennas meet the preset conditions, determine that the combining mode of the signals received on the multiple antennas is an antenna signal multipath combining mode;

If the signals received on the plurality of antennas do not meet the preset conditions, the steps of acquiring signal quality measurement values and determining a combining manner are performed.

With reference to the first aspect or the first possible implementation of the first aspect of the embodiments of the present invention, in the second possible implementation of the first aspect of the embodiments of the present invention, if two antennas are obtained to receive the transmission of the user equipment The signal quality measurement value of the signal, then according to the difference between the signal quality measurement values of the signals received on the multiple antennas and the preset strategy, determine the combination mode of the signals received on the multiple antennas, specifically including:

If the difference between the signal quality measurement values of the received signals on the two antennas is less than the preset threshold value, it is determined that the combining mode of the signals on the two antennas is antenna signal multipath combining or log likelihood ratio flow soft amalgamation of information;

If the difference between the signal quality measurement values of the received signals on the two antennas is greater than a preset threshold value, it is determined that the combination mode of the signals on the two antennas is selective combination of decoding results.

With reference to the first aspect or the first possible implementation manner of the first aspect of the embodiments of the present invention, in the third possible implementation manner of the first aspect of the embodiments of the present invention, if N antennas are obtained to receive the transmission of the user equipment The signal quality measurement value of the signal, the N is a positive integer greater than 2, and the signal quality measurement value of the signal received on the multiple antennas is determined according to the difference between the signal quality measurement values of the signals received on the multiple antennas and the preset strategy. Merger methods, including:

Selecting a signal with the strongest signal strength among the signals received on the N antennas;

Determining the combination method of the first part of the signals received on the N antennas as antenna signal multipath combination or log likelihood ratio flow soft information combination, and combining the combination result of the first part of the signals with the N antennas The combination method of the second part of the signals received above is determined as selective combination of decoding results;

The first part of the signal refers to a signal whose difference from the signal quality measurement value of the selected signal is less than a preset threshold value, and the second part of the signal refers to a signal whose difference from the signal quality measurement value of the selected signal is Signals whose difference is greater than the preset threshold value.

With reference to the third possible implementation manner of the first aspect of the embodiments of the present invention, in the fourth possible implementation manner of the first aspect of the embodiments of the present invention, the number of the first part of signals is within a preset range;

When the number of signals smaller than the preset threshold value exceeds a preset range, selecting M signals with the strongest signal strengths among the signals exceeding the preset range as the first part of signals, the M is within the preset range.

In combination with any of the second possible implementation manner to the fourth possible implementation manner of the first aspect of the embodiments of the present invention, in the fifth possible implementation manner of the first aspect of the embodiments of the present invention, the method further includes : dynamically adjust the preset threshold value.

In combination with the first aspect of the present invention or any of the first possible implementation manner of the first aspect to the fifth possible implementation manner of the first aspect, in the sixth possible implementation manner of the first aspect of the embodiment of the present invention, the The signal quality measurement value at least includes any of the following parameters: uplink signal symbol SNR, uplink signal chip SNR, uplink signal chip energy, uplink signal symbol energy, downlink pilot signal chip SNR and downlink pilot frequency symbol energy.

A second aspect of the embodiments of the present invention provides a network side device, including:

a signal quality acquiring unit, configured to respectively acquire signal quality measurement values of signals transmitted by the user equipment received by the network side equipment on multiple antennas, and transmit the acquired signal quality measurement values to the combining mode determination unit;

A combining mode determining unit, configured to determine the combining mode of the signals received on the multiple antennas according to the difference between the signal quality measurement values of the signals received on the multiple antennas acquired by the signal quality acquiring unit and a preset strategy, The above-mentioned preset strategy includes: the corresponding relationship between the range of the difference between the signal quality measurement values and the combination method;

a combining unit, configured to combine signals received on multiple antennas according to the combining mode determined by the combining mode determining unit;

In the first possible implementation manner of the second aspect of the embodiment of the present invention, the network side device further includes:

The combination mode determining unit is further configured to determine that the combination mode of the signals received on the multiple antennas is an antenna signal multipath combination mode if the signals received on the multiple antennas meet the preset conditions; If the signals received on the multiple antennas do not meet the preset conditions, then determine the combination mode of the signals received on the multiple antennas according to the difference between the signal quality measurement values acquired by the signal quality acquisition unit and the preset strategy.

With reference to the second aspect of the embodiment of the present invention or the first possible implementation of the second aspect, in the second possible implementation of the second aspect of the embodiment of the present invention, if the signal quality acquisition unit acquires Receiving the signal quality measurement value of the signal transmitted by the user equipment, the unit for determining the combination method specifically includes:

The first combination determination unit is configured to determine that the combination method of the signals on the two antennas is antenna signal multipath combination if the difference between the signal quality measurement values of the received signals on the two antennas is less than a preset threshold value. or log-likelihood ratio flow soft information merge;

The second combination determination unit is configured to determine that the combination method of the signals on the two antennas is decoding result selectivity if the difference between the signal quality measurement values of the received signals on the two antennas is greater than a preset threshold value merge.

In combination with the second aspect of the embodiment of the present invention or the first possible implementation of the second aspect, in the third possible implementation of the second aspect of the embodiment of the present invention, it is characterized in that if the signal quality acquisition unit acquires Receive signal quality measurement values of signals transmitted by the user equipment on N antennas, where N is a positive integer greater than 2, and the combining method determining unit specifically includes:

A first signal selection unit, configured to select the signal with the strongest signal strength among the signals received on the N antennas;

The third combination determination unit is used to determine the combination method of the first part of the signals received on the N antennas as antenna signal multipath combination or log likelihood ratio flow soft information combination, and combine the first part of the signal combination result The combination method with the second part of the signals received on the N antennas is determined as selective combination of decoding results;

The first part of the signal refers to a signal whose difference from the signal quality measurement value of the signal selected by the first signal selection unit is less than a preset threshold value, and the second part of the signal refers to a signal that is different from the selected signal Signals whose difference between signal quality measurement values is greater than a preset threshold value.

With reference to the third possible implementation manner of the second aspect of the embodiments of the present invention, in the fourth possible implementation manner of the second aspect of the embodiments of the present invention, the number of the first part of signals is within a preset range;

The third combination determination unit is further configured to select M signals with the strongest signal strengths among the signals exceeding the preset range when the number of the signals smaller than the preset threshold exceeds a preset range The signal of is used as the first partial signal, and the M is within the preset range.

In combination with any of the second possible implementation manner of the second aspect to the fourth possible implementation manner of the second aspect of the embodiments of the present invention, in the fifth possible implementation manner of the second aspect of the embodiments of the present invention, the network Side equipment also includes:

A threshold adjustment unit, configured to dynamically adjust the preset threshold value.

In the method for combining multi-antenna signals in this embodiment, the network-side device will respectively acquire the signal quality measurement values of the signals transmitted by the user equipment received by the network-side device on multiple antennas, and according to the signal quality measurement values of the signals received by the multiple antennas The difference and the preset strategy determine the combination method of the signals received on multiple antennas. The preset strategy includes: the corresponding relationship between the range of the difference between the signal quality measurement value and the combination method; and then according to the determined combination method for multiple The signals received on the antennas are combined. The method of this embodiment can dynamically select an appropriate combination method to combine the signals received by the network side equipment on multiple antennas according to the quality of the signal transmitted by the user equipment actually received by the network side equipment, so that when multi-antenna signals are combined, consideration From the actual communication performance between the user equipment and the network side equipment, the signal detection accuracy obtained after the final combination is relatively high.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a flowchart of a multi-antenna signal combining method provided by an embodiment of the present invention;

FIG. 2 is a flowchart of another multi-antenna signal combining method provided by an embodiment of the present invention;

FIG. 3 is a flow chart of another multi-antenna signal combining method provided by an embodiment of the present invention;

FIG. 4 is a flowchart of another multi-antenna signal combining method provided by an embodiment of the present invention;

FIG. 5 is a flow chart of another multi-antenna signal combining method provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a network side device provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another network-side device provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another network-side device provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another network-side device provided by an embodiment of the present invention;

Fig. 10 is a schematic structural diagram of another network side device provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

An embodiment of the present invention provides a multi-antenna signal combination method, which is mainly applied to a method for network side equipment to combine signals transmitted by user equipment received by network side equipment on multiple antennas. The flow chart is shown in Figure 1, specifically including :

Step 101, the network-side device acquires the signal quality measurement values of signals transmitted by the user equipment received by the network-side device on multiple antennas, wherein the signal quality measurement values are information that can measure the signal quality of signals received by the antennas of the network-side device , can include at least but not limited to any of the following parameters: uplink signal symbol SNR (Signal to Noise Ratio, SIR), uplink signal chip SNR (Energy Chip to Signal Noise Ratio, Ec/No), uplink signal code Chip energy (Energy ofChip, Ec), uplink signal symbol energy (Energy of symbol, Eb) and downlink pilot signal chip signal-to-noise ratio and downlink pilot symbol energy, etc.

In step 102, the network side device determines the combination mode of the signals received on the multiple antennas according to the difference between the signal quality measurement values of the signals received on the multiple antennas and a preset strategy.

Wherein, the difference between the signal quality measurement values refers to the difference between the signals received by the network side equipment on different antennas for the same signal quality measurement value; the combination method may include but not limited to any of the following combination methods: selective combination of decoding results, Antenna signal multipath combination and log likelihood ratio flow soft information combination, etc.; the above preset strategy includes the corresponding relationship between the range of the difference between the signal quality measurement value and the combination method, for example, when the difference between the signal quality measurement value is greater than When within the range of the preset threshold value, the corresponding decoding results can be selectively combined, and the signal with a higher decoding accuracy rate can be selected as the combined result; if the difference between the signal quality measurement values is less than the preset threshold value At this time, when using antenna signal multipath combination or log likelihood ratio flow soft information combination, the performance gain will be much greater than the performance gain generated when decoding results are selectively combined, then the network side equipment adopts antenna signal multipath combination or Log-likelihood ratios flow soft information pooling. The preset threshold value can be dynamically changed. Specifically, the network side device can update the preset threshold value according to actual needs, and dynamically adjust the threshold value according to the dynamic changes of the network device such as the internal resource status of the network device. Preset threshold value.

Wherein, when the network side device obtains the chip noise of the downlink pilot signal or the energy of the downlink pilot symbol in step 101, it is used to indicate the quality of the downlink pilot. When performing step 102, the network side device can receive two The quality difference of the downlink pilots of two cells is converted into the difference of the signal quality of the signal sent by the terminal equipment received by the antennas of each cell on the network side. Antenna capacity, uplink load of two cells, etc.

It can be understood that after the user equipment transmits an uplink signal on the uplink transmission channel, the network side device may first obtain the uplink signal transmitted by the user equipment received on multiple antennas in the network side device, and then pass the received uplink signal The difference between the signal quality measurement values of the antennas is used to dynamically determine which combining method to use to combine the multi-antenna signals.

In step 103, the network side device combines the signals received on the multiple antennas according to the combination method determined in step 102.

Wherein, if the combination method determined in step 102 is multipath combination of antenna signals, the network side device can separately obtain the direct spread spectrum sequences of the signals received on each antenna when performing the combination, and use a correlator to separately separate the signals received by each antenna. The signal corresponds to the direct spread spectrum signal, and then the separated multipath signals are combined according to certain rules to obtain useful signal energy.

If the merging method determined in step 102 is log likelihood ratio flow soft information merging, the network side device can demodulate the signals received on each antenna to obtain the log likelihood ratio of each bit when performing the merging, Then, the log likelihood ratios of the same bits on each antenna are accumulated, and finally the accumulated log likelihood ratio stream can be decoded.

If the merging method determined in step 102 is selective merging of decoding results, the network side device can demodulate and decode the signals received on each antenna when performing merging, and then select the cyclic redundancy check ( Cyclical Redundancy Check, CRC) is used as the final result. If the decoding results of multiple signals pass the CRC check, one of the multiple signals can be selected as the final result according to a certain strategy. , such as selecting the signal with the strongest signal strength as the final result.

It should be noted that the above-mentioned network side device may be a network device such as a base station or a radio network controller (RadioNetwork Controller, RNC) on the uplink of the user equipment, where the signal transmitted by the user equipment on the uplink transmission signal may be sent to multiple base stations In this way, if one of the base stations performs the above steps 101 to 103, then when the base station performs the above step 101, the base station needs to first obtain the signal quality measurement value of other base stations receiving the signal transmitted by the user equipment from other base stations, and then Perform the merging in steps 102 to 103 above. Wherein, after the base station acquires the signal quality measurement value, the base station may directly perform the above steps 102 and 103, or the base station reports the acquired signal quality measurement value to the RNC, and the RNC performs the above steps 102 and 103.

It can be seen that in the method for combining multi-antenna signals in this embodiment, the network side device will obtain the signal quality measurement values of the signals received by the network side device from the user equipment on multiple antennas, and according to the signal quality measurement values of the signals received on multiple antennas The value difference and the preset strategy determine the combination method of the signals received on multiple antennas. The preset strategy includes: the corresponding relationship between the range of the signal quality measurement value difference and the combination method; and then according to the determined combination method. Signals received on multiple antennas are combined. The method of this embodiment can dynamically select an appropriate combination method to combine the signals received by the network side equipment on multiple antennas according to the quality of the signal transmitted by the user equipment actually received by the network side equipment, so that when multi-antenna signals are combined, consideration From the actual communication performance between the user equipment and the network side equipment, the signal detection accuracy obtained after the final combination is relatively high.

It should be noted that the network-side device determines the appropriate combination method according to the difference between the signal quality measurement values of the received signals on each antenna in the above steps 101 and 102. Hardware requirements, etc., make the performance gain obtained for the combination of multi-antenna signals greater. In a specific embodiment, the network side device can also determine the multi-antenna signal according to the following steps before performing the above step 101. The merge method, the flowchart is shown in Figure 2, including:

Step 104, if the signals received on the multiple antennas meet the preset conditions, then it is determined that the combining mode of the signals received on the multiple antennas is the antenna signal multipath combining mode, and then the combining in step 103 can be performed; if multiple If the signal received on the antenna does not meet the preset conditions, the above steps 101 to 103 will be executed.

The above preset conditions can be preset in the network side equipment by the user, so that it can be stipulated that some signals do not need to be determined according to the signal quality measurement value to determine the combination mode, but directly determined as the antenna signal multipath combination mode. Specifically, the preset conditions may include, but are not limited to, the following conditions: signals received on multiple antennas are transmitted to a baseband processing unit, etc., where the baseband processing unit refers to a limited number of antennas receiving multiple antennas The processing unit that demodulates and decodes the signal. The signals received on multiple antennas are radio frequency signals, and the radio frequency signals received from an antenna are first converted into baseband signals, and then these baseband signals can be transmitted to the baseband processing unit, which can further perform demodulation, Baseband processing such as decoding; if the baseband signals from several antenna signals are transmitted to multiple different baseband processing units, these baseband processing units can perform baseband processing on these signals respectively.

In addition, it should be noted that before performing the above step 103, the network side device can also configure the combination process first. Specifically, if the combination method determined in step 102 is antenna signal multipath combination, configure the network side device to perform In the step of merging in step 103 above, the same processing unit such as the baseband processing unit is used to process the signals received on each antenna, that is, the demodulation and decoding of the signals received on each antenna are processed by the same processing unit. If the above-mentioned multiple signals that need to be combined are processed by different processing units such as baseband processing units, the network side device may configure the baseband processing units to transmit signals so that these signals are concentrated on one baseband processing unit for processing.

If the merging method determined in step 102 is log-likelihood ratio flow soft information, configure the network side device to use the same processing unit such as a baseband processing unit to process the data received on each antenna when performing the merging step in step 103. signal; or use different processing units such as baseband processing units to process signals received on each antenna, but it is necessary to configure these baseband processing units to transmit log-likelihood ratio stream soft information. In this case, if different processing units are used for processing, the signals received on each antenna can be demodulated by different processing units to obtain logarithmic likelihood bit streams, and then these can be combined by other units or one of the processing units The log-likelihood bitstream is then decoded.

If the merging method determined in step 102 is selective merging of decoding results, configure the network-side device to use different processing units such as baseband processing units to process the signals received on each antenna when performing the merging step in step 103, and not Establish data transmission channels between processing units. In this case, the signals received on each antenna can be demodulated and decoded by different processing units, and then can be processed by other units such as units on the Radio Network Controller (RNC) side or among them A processing unit collectively selects the decoding results.

In another specific embodiment, when the network side device executes the above step 102, there may be several situations as follows:

(1) In step 101, the signal quality measurement values of the received signals on the two antennas are obtained. In this case, the network side device can implement the above step 102 according to the following steps. The flow chart is shown in Figure 3, including:

A1: Determine whether the difference between the signal quality measurement values of the received signals on the two antennas is greater than a preset threshold value, if greater, perform step B1, and if less, perform step C1. Wherein, if the difference between the signal quality measurement values of the received signals on the two antennas is equal to the preset threshold value, step B1 may be performed, or step C1 may be performed.

B1: Determine that the way to combine signals on the two antennas is selective combination of decoding results, and then perform step 103.

C1: It is determined that the way to combine the signals on the two antennas is antenna signal multipath combination or log likelihood ratio stream soft information combination, and then step 103 is executed.

(2) In step 101, the signal quality measurement values of signals transmitted by the user equipment received on N antennas are obtained, and N is a positive integer greater than 2. In this case, the network side device can implement the above step 102 according to the following steps , the flowchart is shown in Figure 4, including:

A2: Select the signal with the strongest signal strength among the signals received on the N antennas, where the network side device may select multiple signals with the strongest signal strength.

B2: Determine the combination method of the first part of the signals received on the N antennas as antenna signal multipath combination or log likelihood ratio flow soft information combination.

C2: Determine the combination result of the first part of the signals and the combination of the second part of the signals received on the N antennas as the selective combination of decoding results.

The above-mentioned first part of the signal refers to the signal whose difference with the signal quality measurement value of the signal selected in step A2 is less than the preset threshold value, and the second part of the signal refers to the signal whose difference with the signal quality measurement value of the selected signal is greater than the preset threshold value. If the difference between the signal quality measurement values of the signals selected in step A2 is equal to the preset threshold value, the signal of the threshold value may be the first part of the signal or the second part of the signal. And the network-side device can limit the number of the first part of the signals, that is, the number of the first part of the signals needs to be within the preset range, so that the above conditions can be met (that is, signals that are less than the preset threshold value) and exceed the The preset number of signals is used as the second part signal. Further, when the number of signals smaller than the preset threshold value exceeds the preset range, select M signals with the strongest signal strengths among the signals exceeding the preset range as the first part of signals, and M is in the preset range. within range. For example, if the network-side device sets the preset range to 2, then when the number of signals less than the preset threshold value is 5 and exceeds the preset range of 2, the network-side device will select 2 of the 5 signals The signal with the strongest signal strength is used as the first part of the signal.

It should be noted that, after step 102 is performed according to the above steps A2 to C2, when step 103 is performed, the network side device can first combine the first part of the signal according to the way of antenna signal multipath combination or log-likelihood ratio stream soft information combination. After the combination, the combination result of the first part of the signals and the second part of the signals are combined according to the selective combination of decoding results.

(3) In particular, for the above case (2), if the number of the first part of signals is limited to two, in another specific embodiment, the network side device can implement the above step 102 according to the following steps , the flowchart is shown in Figure 5, including:

A3: Select the two signals with the strongest signal strength among the signals received on the N antennas.

B3: Determine whether the difference between the signal quality measurement values of the two signals selected in step A3 is greater than a preset threshold value, if greater, perform step C3, and if less, perform step D3. Wherein, if the difference between the measured signal quality values of the two signals is equal to the preset threshold value, step C3 may be performed, or step D1 may be performed.

C3: Determine that the combination method of the two signals selected in step A3 is selective combination of decoding results, and then perform step E3.

D3: Determine that the combination method of the two signals selected in step A3 is antenna signal multipath combination or log likelihood ratio flow soft information combination, and then perform step E3.

E3: Determine the combination method of the combination result of the two signals selected in step A3 and other signals among the signals received on the N antennas as selective combination of decoding results.

It should be noted that, by performing step 102 in the second and third ways above, the signals received on more than two antennas can be combined, and other ways can also be used in practical applications, which will not be repeated here.

The embodiment of the present invention also provides a network-side device, in which various units in the network-side device can combine multi-antenna signals according to the above steps, and the network-side device can be a base station or an RNC as shown in schematic diagram 6, including:

The signal quality acquisition unit 10 is configured to respectively acquire signal quality measurement values of signals transmitted by the user equipment received by the network side equipment on multiple antennas, and transmit the acquired signal quality measurement values to the combination method determination unit 11, wherein the signal quality The quality measurement value includes any of the following parameters: uplink signal symbol SNR, uplink signal chip SNR, uplink signal symbol energy and uplink signal chip energy, and downlink pilot signal chip SNR and downlink pilot symbol energy wait.

Combination method determination unit 11, configured to determine the combination method of signals received on the plurality of antennas according to the difference between the signal quality measurement values of the signals received on the plurality of antennas and a preset strategy, in the preset strategy Including: the corresponding relationship between the range of the difference between the signal quality measurement value and the combination method; when the signal quality acquisition unit 10 acquires the chip noise of the downlink pilot signal or the energy of the downlink pilot symbol, it is used to indicate the downlink pilot quality, then the combination method determination unit 11 can convert the quality difference between the downlink pilots received by the terminal equipment from two cells into the signal quality difference of the signals sent by the terminal equipment received by the antennas of each cell of the network side equipment. The input factors include the downlink pilot frequency difference between the two cells, the uplink receiving antenna capabilities of the two cells, and the uplink load of the two cells.

The combining unit 12 is configured to combine signals received on multiple antennas according to the combining mode determined by the combining mode determining unit 11 . In the process of specific implementation, the merging unit 12 may specifically be one of the above-mentioned baseband processing units or a plurality of the above-mentioned baseband processing units, or a unit on the RNC side, etc., wherein, if the merging method determination unit 11 determines that it is translation code result selective merging mode, then the merging unit 12 can be implemented by the RNC side; and if the merging mode determination unit 11 determines the logarithmic likelihood ratio stream soft information merging mode, then the merging unit 12 can involve multiple If the combination method determination unit 11 determines the antenna signal multipath combination method, then the combination unit 12 may be one baseband processing unit or multiple baseband processing units.

In the network-side device in this embodiment, the signal quality acquisition unit 10 will separately acquire the signal quality measurement values of the network-side device receiving signals transmitted by the user equipment on multiple antennas, and the combination method determining unit 11 will obtain the signal quality measurement values received by the network-side device according to the signals received on multiple antennas. The difference between the measured signal quality values and the preset strategy determine the combination method of the signals received on multiple antennas, and the preset strategy includes: the corresponding relationship between the range of the difference between the measured signal quality values and the combination method; then the combination unit 12 Combine the signals received on the multiple antennas according to the determined combining manner. In this way, according to the quality of the signal transmitted by the user equipment actually received by the network side equipment, an appropriate combination method can be selected to combine the signals received by the network side equipment on multiple antennas, so that the user equipment and the network can be considered when combining multi-antenna signals. The actual communication performance between the side devices, and the signal detection accuracy obtained after the final combination is relatively high.

Referring to FIG. 7, in a specific embodiment, in addition to the structure shown in FIG. 6, the network side device can also include a first configuration unit 13 and a second configuration unit 14, so that the merging unit 12 can The configuration of the first configuration unit 13 and the second configuration unit 14 performs the step of merging, wherein:

In this embodiment, the above-mentioned combination method determination unit 11 can also be used to determine that the combination method of the signals received on the multiple antennas is that the signals received on the multiple antennas meet the preset conditions. path combining mode; if the signals received on the multiple antennas do not meet the preset conditions, then determine the signal received on the multiple antennas according to the difference between the signal quality measurement values obtained by the signal quality acquisition unit and the preset strategy. The way the signals are combined.

The first configuration unit 13 is configured to use the same processing unit such as a baseband processing unit to process each Signals received on the antenna, or configured to use different processing units to process the signals received on each antenna, but signal transmission channels between each processing unit need to be configured; if the combination method determined by the combination method determination unit 11 is logarithmic Likelihood ratio stream soft information merging, when configuring the network side device to perform the merging step, use the same or different processing units to process signals received on each antenna, wherein, for using different processing units to process signals received on each antenna In some cases, the first configuration unit 13 may configure LLR stream transmission channels between various processing units.

The second configuration unit 14 is configured to, if the combination method determined by the combination method determining unit 11 is selective combination of decoding results, configure the network side device to use different processing units to process each antenna when performing the step of combining When receiving signals on the Internet, a decoding result transmission channel is configured between each processing unit.

In this embodiment, if the signals received on each antenna meet the preset conditions, for example, the signals received on each antenna are on a baseband processing unit, then the combination mode determining unit 11 directly determines that the combination mode of multi-antenna signals is antenna The signal multipath is combined, and then the combination of multi-antenna signals is carried out by the combination unit 12; if the signals received on each antenna do not meet the preset conditions, such as the signals received on each antenna are on different baseband processing units, then the combination method The determination unit 11 will determine the combination mode of the multi-antenna signals according to the signal quality measurement value, and then the combination unit 12 performs the combination, wherein the first configuration unit 13 and the second configuration unit 14 can combine the multi-antenna signals by the combination unit 12 to configure.

In another specific embodiment, the merging mode determination unit 11 in the network side device may be implemented in any one or more of the following ways:

(1) Referring to FIG. 8 , if the signal quality acquisition unit 10 acquires the signal quality measurement values of signals transmitted by the user equipment received on two antennas, the combination method determination unit 11 may specifically include a first combination determination unit 110 and a second combination determination unit 110 . Combining the determination unit 111, and the network side device may also include a threshold adjustment unit 15, wherein:

The first combining determination unit 110 is configured to determine the signal quality of the signals on the two antennas if the difference between the signal quality measurement values obtained by the signal quality acquiring unit 10 on the two antennas is less than a preset threshold value. The combination method is antenna signal multipath combination or log likelihood ratio flow soft information combination;

The second combining determination unit 111 is configured to determine the signal quality of the signals on the two antennas if the difference between the signal quality measurement values obtained by the signal quality acquiring unit 10 on the two antennas is greater than a preset threshold value. The merging method is selective merging of decoding results. Wherein if the difference between the signal quality measurement values of the received signals on the two antennas is equal to the preset threshold value, the first combination determination unit 110 or the second combination determination unit 111 can determine the combination mode of the signals on the two antennas for any combination.

The threshold adjustment unit 15 is configured to dynamically adjust the preset threshold value compared in the first combination determination unit 110, specifically, the preset can be dynamically adjusted according to the dynamic changes of the network equipment such as the internal resource status of the network equipment threshold value.

(2) Referring to FIG. 9 , if the signal quality acquisition unit 10 acquires signal quality measurement values of signals transmitted by user equipment received on N antennas, where N is a positive integer greater than 2, then the combination method determination unit 11 Specifically, it may include a signal selection unit 112 and a third combination determination unit 113, and the network side device may also include a threshold adjustment unit 15, wherein:

The signal selection unit 112 is configured to select a signal with the strongest signal strength among the signals received on the N antennas; the selected signal may be one or more signals with the strongest signal strength.

The third combination determining unit 113 is configured to determine the combination method of the first part of the signals received on the N antennas as antenna signal multipath combination or log likelihood ratio stream soft information combination, and combine the first part of the signals The combination method of the result and the second part of the signals received on the N antennas is determined as the selective combination of decoding results; wherein, the first part of the signal refers to the signal quality of the signal selected by the signal selection unit 112 The difference between the measured values is less than the preset threshold value. The second part of the signal refers to the signal whose difference with the signal quality measurement value of the selected signal is greater than the preset threshold value. If it is different from the selected signal When the difference between the measured signal quality values is equal to the preset threshold value, the signal may be the first part of the signal or the second part of the signal. The number of signals in the first part can be limited within a preset range. Wherein, the third combination determination unit 113 may use signals that meet the above conditions (ie, signals that are smaller than a preset threshold value) and exceed a preset number as the second part of signals.

Further, the third combining determination unit 113 may also select M signals with the highest signal strengths among the signals exceeding the preset range when the number of the signals smaller than the preset threshold exceeds a preset range. A strong signal is used as the first part of the signal, and the M is within the preset range.

The threshold adjustment unit 15 is configured to dynamically adjust the preset threshold value compared in the third combination determination unit 113 .

(3) In particular, if in the case of (2) above, the number of signals in the first part is limited to two, then:

The signal selection unit 112 included in the combination method determination unit 11 is specifically used to select the two signals with the strongest signal strength among the signals received on the N antennas; and the above-mentioned third combination determination unit 113 is specifically used to If the difference between the signal quality measurement values of the two signals selected by the signal selection unit 112 is smaller than the preset threshold value, it is determined that the combination method of the two selected signals is antenna signal multipath combination or logarithmic likelihood Combining softer information than the stream; if the difference between the signal quality measurement values of the two selected signals is greater than a preset threshold value, then determining that the two selected signals are combined in a selective combination of decoding results; then A combination method of the combination result of the two signals selected by the signal selection unit 112 and other signals among the signals received on the N antennas is determined as selective combination of decoding results.

The embodiment of the present invention also provides another network-side device, as shown in FIG. 10 , including a memory 20, a processor 21, an input device 23, and an output device 24 respectively connected to the bus, wherein:

The memory 20 is used to store the data imported from the input device 23, and can also store information such as necessary files for processing the data by the processor 21; the input device 23 and the output device 24 are ports for network side equipment to communicate with other equipment, and can also include Devices connected to the network side device, such as monitors, keyboards, mice, and printers.

The processor 21 is configured to respectively obtain signal quality measurement values of the network side equipment receiving and transmitting signals on multiple antennas, wherein the signal quality measurement values at least include any of the following parameters: uplink signal symbol signal-to-noise ratio, uplink signal chip signal Noise ratio, uplink signal symbol energy and uplink signal chip energy, downlink pilot signal chip SNR and downlink pilot symbol energy, etc.; The strategy determines the combination method of the signals received on the multiple antennas, and the preset strategy includes: the corresponding relationship between the range of the difference between the signal quality measurement value and the combination method; finally, according to the determined combination method, multiple The signals received on the two antennas are combined. In this way, according to the quality of the signal transmitted by the user equipment actually received by the network side equipment, an appropriate combination method can be selected to combine the signals received by the network side equipment on multiple antennas, so that the user equipment and the network can be considered when combining multi-antenna signals. The actual communication performance between side devices, and the accuracy of the signal obtained after the final combination is relatively high.

Further, the processor 21 is also configured to determine that the signals received on the multiple antennas meet preset conditions, such as multiple signals that need to be combined are transmitted to a baseband processing unit, then determine that the signals received on the multiple antennas The signal combination method is the antenna signal multipath combination method; if the signals received on multiple antennas do not meet the preset conditions, such as multiple signals that need to be combined are transmitted to multiple different baseband processing units, then according to The signal quality measurements described above determine how the multi-antenna signals are combined. And the processor 21 can also configure the merging process before performing the merging step. Specifically, if the determined merging method is antenna signal multipath merging, the processor 21 can configure the network side device to perform the merging step When , use the same processing unit to process the signals received on each antenna, or configure different processing units to process the signals received on each antenna, but need to configure the signal transmission channel between each processing unit; if the determined combination method is The log likelihood ratio stream soft information is combined, and the processor 21 can configure the network side device to use the same or different processing units to process the signals received on each antenna when performing the step of combining, wherein, for using different processing units to process In the case of signals received on each antenna, the processor 21 can configure the LLR stream transmission channel between each processing unit; if the determined combination method is selective combination of decoding results, the processor 21 configures the network side device in the When performing the step of merging, different processing units are used to process signals received on each antenna, and decoding result transmission channels are configured between each processing unit.

In a specific embodiment, when the processor 21 determines the merging mode, there may be several implementations as follows:

(1) The processor 21 is configured to, when acquiring the signal quality measurement values of signals transmitted by the user equipment received on the two antennas, if the difference between the acquired signal quality measurement values of the received signals on the two antennas is less than a preset threshold value, then it is determined that the combining method of the signals on the two antennas is antenna signal multipath combining or log-likelihood ratio flow soft information combining; threshold value, then it is determined that the combining mode of the signals on the two antennas is selective combining of decoding results. If the difference between the signal quality measurement values of the received signals on the two antennas is equal to the preset threshold value, it can be determined that the combining mode of the signals on the two antennas is any combining mode.

(2) The processor 21 is configured to acquire the signal quality measurement values of signals transmitted by the user equipment received on N antennas, where N is a positive integer greater than 2, and use the signal quality values received on the N antennas Select the signal with the strongest signal strength among the signals; the combination mode of the first part of the signals received on the N antennas is determined as antenna signal multipath combination or log likelihood ratio flow soft information combination, and the combination of the first part of the signals The combination method of the result and the second part of the signals received on the N antennas is determined as selective combination of decoding results; wherein, the first part of the signal means that the difference between the signal quality measurement value of the selected signal and the selected signal is less than the preset The signal of the preset threshold value, and the number of the first part of the signal can be limited within the preset range, and the second part of the signal means that the difference between the signal quality measurement value and the selected signal is greater than the preset threshold If the difference between the signal quality measurement value and the signal quality measurement value of the selected signal is equal to the preset threshold value, the signal may be the first part of the signal or the second part of the signal.

Wherein, the processor 21 may use signals that meet the above conditions (that is, signals that are smaller than a preset threshold value) and exceed a preset number as the second part of signals. Further, the processor 21 may also select M signals with the strongest signal strengths among the signals exceeding the preset range when the number of the signals smaller than the preset threshold value exceeds the preset range As the first partial signal, the M is within the preset range.

(3) In particular, in the case of (2) above, if the number of the first part of signals is limited to two, the processor 21 is specifically used to select a signal from the signals received on the N antennas The two signals with the strongest strength; if the difference between the signal quality measurement values of the two selected signals is less than a preset threshold value, then it is determined that the combination method of the two selected signals is antenna signal multipath combination or Logarithmic likelihood ratio flow soft information combination; if the difference between the signal quality measurement values of the two selected signals is greater than the preset threshold value, it is determined that the combination method of the two selected signals is the decoding result selection Determining the combination result of the selected two signals and other signals among the signals received on the N antennas as selective combination of decoding results.

It should be noted that the above-mentioned preset threshold value can be dynamically changed. Specifically, the processor 21 can update the preset threshold value according to actual needs, and according to the dynamic changes of the network device such as the internal resources of the network device The state dynamically adjusts the preset threshold.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium can include: Read Only Memory (ROM), Random Access Memory (RAM), Magnetic or Optical Disk, etc.

The multi-antenna signal combining method and the network side equipment provided by the embodiment of the present invention are described above in detail. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiment is only for helping understanding The method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be construed as a limitation of the invention.

Claims (13)

1. A multi-antenna signal combining method is characterized in that, comprising: Respectively acquiring signal quality measurement values of signals transmitted by the user equipment received by the network side equipment on multiple antennas; Determine the combination mode of the signals received on the multiple antennas according to the difference between the signal quality measurement values of the signals received on the multiple antennas and a preset strategy, and the preset strategy includes: a difference between the signal quality measurement values The corresponding relationship between the range of the difference and the combination method; Combine signals received on multiple antennas according to the determined combining manner. 2. The method according to claim 1, wherein before acquiring the signal quality measurement values of the network side equipment receiving the signal transmitted by the user equipment on multiple antennas, further comprising: If the signals received on the multiple antennas meet the preset conditions, determine that the combining mode of the signals received on the multiple antennas is an antenna signal multipath combining mode; If the signals received on the plurality of antennas do not meet the preset conditions, the steps of acquiring signal quality measurement values and determining a combining manner are performed. 3. The method according to claim 1 or 2, wherein if the signal quality measurement values of signals transmitted by the user equipment received on two antennas are acquired, then according to the signal quality of signals received on the multiple antennas The difference between the measured values and the preset strategy determine how to combine the signals received on the multiple antennas, specifically including: If the difference between the signal quality measurement values of the received signals on the two antennas is less than the preset threshold value, it is determined that the combining mode of the signals on the two antennas is antenna signal multipath combining or log likelihood ratio flow soft amalgamation of information; If the difference between the signal quality measurement values of the received signals on the two antennas is greater than a preset threshold value, it is determined that the combination mode of the signals on the two antennas is selective combination of decoding results. 4. The method according to claim 1 or 2, wherein if the signal quality measurement values of signals transmitted by the user equipment received on N antennas are obtained, and the N is a positive integer greater than 2, then according to the The difference between the signal quality measurement values of the signals received on the multiple antennas and the preset strategy determine the combination mode of the signals received on the multiple antennas, specifically including: Selecting a signal with the strongest signal strength among the signals received on the N antennas; Determining the combination method of the first part of the signals received on the N antennas as antenna signal multipath combination or log likelihood ratio flow soft information combination, and combining the combination result of the first part of the signals with the N antennas The combination method of the second part of the signals received above is determined as selective combination of decoding results; The first part of the signal refers to a signal whose difference from the signal quality measurement value of the selected signal is less than a preset threshold value, and the second part of the signal refers to a signal whose difference from the signal quality measurement value of the selected signal is Signals whose difference is greater than the preset threshold value. 5. The method according to claim 4, characterized in that, the quantity of the first partial signal is within a preset range; When the number of signals smaller than the preset threshold value exceeds a preset range, selecting M signals with the strongest signal strengths among the signals exceeding the preset range as the first part of signals, the M is within the preset range. 6. The method according to claim 3, 4 or 5, further comprising: dynamically adjusting the preset threshold value. 7. The method according to any one of claims 1 to 6, wherein the signal quality measurement value at least includes any of the following parameters: uplink signal symbol SNR, uplink signal chip SNR, uplink signal Code chip energy, uplink signal symbol energy, downlink pilot signal chip SNR and downlink pilot symbol energy. 8. A network side device, characterized in that it comprises: a signal quality acquiring unit, configured to respectively acquire signal quality measurement values of signals transmitted by the user equipment received by the network side equipment on multiple antennas, and transmit the acquired signal quality measurement values to the combining mode determination unit; A combining mode determining unit, configured to determine a combining mode of signals received on the multiple antennas according to the difference between the signal quality measurement values of the signals received on the multiple antennas and a preset strategy, in the preset strategy Including: the corresponding relationship between the range of the difference between the signal quality measurement values and the combination method; a combining unit, configured to combine signals received on multiple antennas according to the combining mode determined by the combining mode determining unit. 9. The device of claim 8, further comprising: The combination mode determining unit is further configured to determine that the combination mode of the signals received on the multiple antennas is an antenna signal multipath combination mode if the signals received on the multiple antennas meet the preset conditions; If the signals received on the multiple antennas do not meet the preset conditions, then determine the combination mode of the signals received on the multiple antennas according to the difference between the signal quality measurement values acquired by the signal quality acquisition unit and the preset strategy. 10. The device according to claim 8 or 9, wherein if the signal quality acquiring unit acquires signal quality measurement values of signals transmitted by the user equipment received on two antennas, the combining mode determining unit, Specifically include: The first combination determination unit is configured to determine that the combination method of the signals on the two antennas is antenna signal multipath combination if the difference between the signal quality measurement values of the received signals on the two antennas is less than a preset threshold value. or log-likelihood ratio flow soft information merge; The second combination determination unit is configured to determine that the combination method of the signals on the two antennas is decoding result selectivity if the difference between the signal quality measurement values of the received signals on the two antennas is greater than a preset threshold value merge. 11. The device according to claim 8 or 9, wherein if the signal quality acquisition unit acquires signal quality measurement values for receiving signals transmitted by the user equipment on N antennas, the N is greater than 2 A positive integer, the merging method determines the unit, specifically including: A first signal selection unit, configured to select the signal with the strongest signal strength among the signals received on the N antennas; The third combination determination unit is used to determine the combination method of the first part of the signals received on the N antennas as antenna signal multipath combination or log likelihood ratio flow soft information combination, and combine the first part of the signal combination result The combination method with the second part of the signals received on the N antennas is determined as selective combination of decoding results; The first part of the signal refers to a signal whose difference from the signal quality measurement value of the signal selected by the first signal selection unit is less than a preset threshold value, and the second part of the signal refers to a signal that is different from the selected signal Signals whose difference between signal quality measurement values is greater than a preset threshold value. 12. The device according to claim 11, wherein the quantity of the first part of signals is within a preset range; The third combination determination unit is further configured to select M signals with the strongest signal strengths among the signals exceeding the preset range when the number of the signals smaller than the preset threshold exceeds a preset range The signal of is used as the first partial signal, and the M is within the preset range. 13. The device according to claim 10, 11 or 12, further comprising: a threshold adjusting unit, configured to dynamically adjust the preset threshold.

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