WO2015113251A1

WO2015113251A1 - Interference suppression method and device

Info

Publication number: WO2015113251A1
Application number: PCT/CN2014/071763
Authority: WO
Inventors: 朱有团
Original assignee: 华为技术有限公司
Priority date: 2014-01-29
Filing date: 2014-01-29
Publication date: 2015-08-06
Also published as: CN104170339B; CN104170339A

Abstract

Embodiments of the present invention relate to an interference suppression method and device. The method comprises: a receiving end receiving a first signal, the first signal carrying first data of a first user equipment; the receiving end obtaining a soft symbol corresponding to the first data; the receiving end reconstructing a signal corresponding to the first data according to the soft symbol; the receiving end receiving a second signal, the second signal carrying the first data and second data of a second user equipment; the receiving end cancelling the second signal according to the reconstructed signal corresponding to the first data so as to obtain a third signal, the third signal carrying the second data; and the receiving end processing the third signal to obtain the second data.

Description

Description of the method and device for suppressing interference

Technical field

The present invention relates to the field of communications technologies, and in particular, to an interference suppression method and apparatus. Background technique

In order to ensure the success rate of data transmission during the communication process, the transmitting end usually performs modulation and coding, rate matching, and the like on the data with higher reliability requirements, and then repeats the transmission according to the protocol format previously agreed with the receiving end. Or retransmission and other methods to transmit data to the receiving end. However, in the process of data retransmission or retransmission, the subsequently transmitted data block may interfere with the transmission of other data of the user or other user data, affecting the user experience.

In the prior art, cancellation techniques are used to reduce interference. The receiving end receives the data sent by the sending end through the protocol format previously agreed with the transmitting end, firstly detects the actually received data, performs data reconstruction and cancellation, and eliminates repeated data transmission or retransmission of data. Interference. However, a large delay occurs in the above process, resulting in a decrease in reception performance at the receiving end. Summary of the invention

The embodiment of the invention provides an interference suppression method and device, which solves the problem that the delay of the cancellation processing is large and the receiving performance of the receiving end is low.

In a first aspect, an embodiment of the present invention provides an interference suppression apparatus, where the apparatus includes: a receiving unit, configured to receive a first signal, where the first signal carries first data of a first user equipment;

An obtaining unit, configured to acquire a soft symbol corresponding to the first data;

a reconstruction unit, configured to reconstruct a signal corresponding to the first data according to the soft symbol; the receiving unit is further configured to receive a second signal, where the second signal carries the first data And second data of the second user equipment;

And the canceling unit is configured to: cancel the second signal according to the reconstructed signal corresponding to the first data, to obtain a third signal, where the third signal carries the second data;

And a processing unit, configured to process the third signal to obtain the second data.

In a first possible implementation, the cancellation unit is specifically configured to: subtract, by the second signal, the reconstructed signal corresponding to the first data.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation, the acquiring unit is specifically configured to: perform demodulation on the first data, complete a soft decision, and obtain The soft symbol.

The cancellation unit is specifically configured to cancel the second signal before demodulating the second signal.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation, the processing unit is specifically configured to perform demodulation, decoding, and detection on the third signal.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a fourth possible implementation, the acquiring unit is specifically configured to: perform demodulation and decoding on the first data, Soft symbols.

The cancellation unit is specifically configured to cancel the second signal before decoding the second signal.

In conjunction with the fourth possible implementation of the first aspect, in a fifth possible implementation, the processing unit is specifically configured to: decode and detect the third signal.

In a sixth possible implementation, the receiving unit is specifically configured to: demodulate or decode the first signal, and obtain soft information of the first user equipment;

The acquiring unit is specifically configured to acquire the soft symbol according to the soft information.

In a second aspect, an embodiment of the present invention provides an interference suppression apparatus, where the apparatus includes: a receiving unit, configured to receive a first signal, where the first signal carries first data of a first user equipment; a decoding unit, configured to decode the first signal, to obtain a soft symbol corresponding to the first data, and an acquiring unit, configured to acquire, according to the soft symbol corresponding to the first data, the first user equipment a signal corresponding to the second data, the second data and the first data corresponding to the same coding block; the receiving unit is further configured to receive the second signal, where the second signal carries the second data and the second Third data of the user equipment;

The decoding unit is further configured to: decode the second signal;

And the canceling unit is configured to: cancel the second signal that is decoded according to the signal corresponding to the second data, to obtain a third signal, where the third signal carries the third data;

In a first possible implementation, the cancellation unit is specifically configured to: subtract the signal corresponding to the second data from the decoded second signal.

In a second possible implementation, the decoding unit is specifically configured to acquire soft information of the first data, and obtain the soft symbol according to the soft information.

In a third aspect, an embodiment of the present invention provides an interference suppression method, where the method includes: receiving, by a receiving end, a first signal, where the first signal carries first data of a first user equipment; a soft symbol corresponding to the first data;

The receiving end reconstructs a signal corresponding to the first data according to the soft symbol;

Receiving, by the receiving end, a second signal, where the second signal carries the first data and the second data of the second user equipment;

The receiving end cancels the second signal according to the reconstructed signal corresponding to the first data, to obtain a third signal, where the third signal carries the second data;

The receiving end processes the third signal to obtain the second data.

In a first possible implementation, the canceling the second signal specifically includes: receiving, by the receiving end, the signal corresponding to the reconstructed first data by using the reconstructed second signal .

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation, the receiving, by the receiving end, the soft symbol corresponding to the first data, specifically, the soft symbol The number is obtained by the demodulator of the receiving end through soft decision;

The canceling the second signal specifically includes: the receiving end cancels the second signal before demodulating the second signal.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner, the receiving, by the receiving end, processing, by the receiving end, the receiving end is configured to solve the third signal Tuning, decoding and detection.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a fourth possible implementation, the acquiring, by the receiving end, the soft symbol corresponding to the first data includes: The decoder at the receiving end is obtained;

The canceling the second signal specifically includes: the receiving end cancels the second signal before decoding the second signal.

With the fourth possible implementation of the third aspect, in a fifth possible implementation, the receiving, by the receiving end, processing, by the receiving end, the receiving end, Code and detection.

In a sixth possible implementation, the receiving, by the receiving end, the first signal, the receiving end demodulating or decoding the first signal, and acquiring soft information of the first data;

The obtaining, by the receiving end, the soft symbol corresponding to the first data, the receiving end acquiring the soft symbol according to the soft information.

In a fourth aspect, an embodiment of the present invention provides an interference suppression method, where the method includes: receiving, by a receiving end, a first signal, where the first signal carries first data of a first user equipment; The first signal is decoded to obtain a soft symbol corresponding to the first data; the receiving end acquires a signal corresponding to the second data of the first user equipment according to the soft symbol corresponding to the first data, where the The second data corresponds to the same data block as the first data; the receiving end receives the second signal, and the second signal carries the second data and the third data of the second user equipment;

The receiving end decodes the second signal; The receiving end cancels the decoded second signal according to the signal corresponding to the second data, to obtain a third signal, where the third signal carries the third data;

The receiving end processes the third signal to obtain the second data.

In a first possible implementation manner, the performing, by the receiving end, canceling, by the receiving end, the decoded second signal by subtracting the second data corresponding to the decoded second signal signal of.

In a second possible implementation manner, the receiving end receiving the first signal specifically includes: the receiving end decoding the first signal, acquiring soft information of the first data; The soft symbol corresponding to the first data specifically includes: the receiving end acquiring the soft symbol according to the soft information. The first data of the user equipment acquires the soft symbol corresponding to the first data, and reconstructs the signal corresponding to the first data by using the soft symbol, when receiving the second data having the first data and the second user equipment, according to the weight Forming a signal corresponding to the first data, canceling the first data included in the second data, reducing interference formed when the receiving end receives multiple user data, reducing delay of the cancellation processing, and improving receiving at the receiving end performance. DRAWINGS

FIG. 1 is a flowchart of an interference suppression method according to an embodiment of the present invention;

2 is a flowchart of another interference suppression method according to an embodiment of the present invention;

3 is a schematic structural diagram of an interference suppression apparatus according to an embodiment of the present invention;

4 is a schematic structural diagram of another interference suppression apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of hardware of an interference suppression apparatus according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of hardware of another interference suppression apparatus according to an embodiment of the present invention. detailed description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the drawings, and the embodiments are described as a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

In order to facilitate the understanding of the present invention, the following description of the embodiments of the present invention is not to be construed as limiting.

The interference suppression method and apparatus provided by the embodiments of the present invention are applicable to a mobile communication system (Universal Mobile Telecommunications System, UMTS for short), a Long Term Evolution (LTE) communication system, etc., where The UMTS communication system may be a Wideband Code Division Multiple Access (WC) communication system or a Time Division-Synchronous Code Division Multiple Access (TDS-CDMA). In the above communication system, when the transmitting end and the receiving end communicate with each other, the receiving end cancels the data signal sent by the transmitting end according to the method or device provided by the embodiment of the present invention, thereby suppressing interference.

In the embodiment of the present invention, the receiving end may be specifically a base station, an access point, and the like in the foregoing communication system; and the sending end may be specifically a user terminal. The interference suppression process in the embodiment of the present invention can be applied in both uplink and downlink communication processes of the user equipment and the base station.

The base station in the embodiment of the present invention may be a base transceiver station (BTS) of GSM or CDMA system, or may be a Node B in a WCDMA system, and further in the LTE system and LTE. In the evolved system, the base station may be an evolved Node B (e-Node B); the access point may be an AP (Access Point); the user terminal may be wirelessly connected to the base station. User equipment (UE, user equipment) for data transmission, such as a mobile phone, or a personal computer having a wireless communication function.

The interference suppression method provided in the first embodiment of the present invention is described in detail below by using FIG. 1 as an example. 1 is a flowchart of an interference suppression method according to Embodiment 1 of the present invention. In the embodiment of the present invention, the following is performed. The implementation body of the step is a receiving end, and can also be implemented by an application module loaded in the receiving end. As shown in FIG. 1, the embodiment specifically includes the following steps:

Step 110: The receiving end receives the first signal, where the first signal carries the first data of the first user equipment.

The first signal is a signal obtained after modulation and coding processing by the transmitting end, and the first signal carries communication data required by the receiving end. Specifically, the UE, as the transmitting end, stores the data to be sent in a bit format. When the UE needs to request network access to the receiving end, or performs correlation, the UE modulates the data in the symbol format by using spreading and scrambling. A signal is sent to the receiving end, and the first signal carries data required for the UE to communicate with the receiving end, that is, the first data.

Optionally, the receiving end receiving the first signal includes: the receiving end demodulating or demodulating the first signal to obtain the soft information corresponding to the first data. The soft information specifically refers to a log likelihood ratio output by the demodulator of the receiving end after demodulating the first data or a log likelihood ratio output by the decoder of the receiving end after decoding the first data. The corresponding soft symbol can be calculated by obtaining soft information.

Step 120: The receiving end acquires a soft symbol corresponding to the first data.

Optionally, the receiving end may obtain the soft symbol corresponding to the first data according to the soft information of the first data obtained after demodulation, or demodulation and decoding.

The soft information may specifically be demodulated information or decoded information. In an implementation manner, the receiving, by the receiving end, the soft symbol corresponding to the first data includes: the soft symbol is obtained by a softband decision by a demodulator at the receiving end. The demodulator performs soft decision processing on the received first data to obtain demodulated information. Using the demodulation information, the receiving end acquires the soft symbol corresponding to the first data. In another implementation manner, the acquiring, by the receiving end, the soft symbol corresponding to the first data includes: the soft symbol is obtained by a decoder at the receiving end. The decoder performs decoding processing on the received first data to obtain decoding information. Using the decoding information, the receiving end acquires the soft symbol corresponding to the first data.

Optionally, in the embodiment of the present invention, the first signal may be a data repetition signal or The data is retransmitted.

The data repetition signal means that the transmitting end repeatedly transmits the same signal several times according to a protocol format agreed in advance with the receiving end, and the repeatedly transmitted signal is a data repetition signal, and the first signal received by the receiving end is specifically Data repetition signal.

The data retransmission signal refers to: the transmitting end according to a protocol format previously agreed with the receiving end, when the receiving end fails to pass the receiving end check on the currently received first signal, the transmitting end re-rates the first signal. After that, the retransmission is performed until the receiving end can verify the first signal by the receiving end, where, as an example and not by way of limitation, the receiving end check includes a Cyclic Redundancy Check (CRC). The verification method in the prior art is not mentioned here. The first signal transmitted by the above retransmission is a data retransmission signal.

The transmitting end performs different rate matching on the first signal. Specifically, the sending end matches the first signal with multiple rates, so that the first signal sent by the transmitting end has a different rate.

When the first signal is a data repetition signal, the demodulator performs soft decision processing on the data repetition signal to obtain demodulation information of the first data of the UE carried in the data repetition signal, where the demodulation information is the first data. In the log likelihood ratio of bi t , the receiving end uses the same rate matching parameter as the transmitting end to perform rate matching on the log likelihood ratio of bi t , and obtains the log likelihood ratio of the bi t of the modulation symbol. The modulation symbol is specifically a symbol obtained by the transmitting end modulating the first data. The expected value (mean) of the modulation symbol is obtained as a soft symbol of the modulation symbol according to the log likelihood ratio of all symbols of a modulation symbol, and the soft symbol is a soft symbol corresponding to the first data.

When the first signal is a data retransmission signal, after the decoder at the receiving end decodes the first data carried in the data retransmission signal, the receiving end identifies whether the decoding process performed on the first data passes the CRC calibration. If the CRC check is not passed, the receiving end obtains the decoding information, and at the same time, the receiving end sends a negative acknowledgement message (Nega ive Acknowledgement, referred to as NACK message) to the transmitting end; using the decoding information, the receiving end obtains The soft symbol corresponding to the first data. The NACK message is used to enable the transmitting end to determine that the receiving end is not correctly decoded, and retransmit the data retransmission signal; meanwhile, the receiving end Decoding the first data carried by the retransmitted data retransmission signal and subsequent identification processing are the same as the processing of the first data, and are not repeated here.

If the CRC is verified (that is, the receiving end correctly decodes), the receiving end sends a response message (ie, Acknowledgement, referred to as ACK message) to the transmitting end.

It can be understood that, when the transmitting end retransmits the data retransmission signal, after the rate of the data to be sent is re-synchronized, after the transmission interval is separated by a plurality of transmission time intervals (TTI), the data is re-transmitted. Signal.

It should be noted that, in the foregoing two implementation manners, the data included in the first signal sent by the transmitting end is the complete data to be sent by the transmitting end, that is, the receiving end demodulates or translates the received first signal. After the code, the first data sent by the sender can be completely restored.

Step 130: The receiving end reconstructs a signal corresponding to the first data according to the soft symbol. The receiving end performs soft modulation, spreading, scrambling and the like on the soft symbols, and reconstructs a signal corresponding to the first data according to the results of channel estimation and multipath searching. The specific reconstruction steps can refer to related content in the prior art, and are not mentioned here.

Step 140: The receiving end receives a second signal, where the second signal carries the first data and the second data of the second user equipment.

Step 150: The receiving end cancels the second signal according to the reconstructed signal corresponding to the first data, to obtain a third signal, where the third signal carries the second data. The second data refers to data used by other user equipments to communicate with the receiving end after the cancellation processing eliminates the signal corresponding to the data of the first user equipment.

When the receiving end receives the second signal, the receiving end performs the cancellation processing on the second signal by using the signal corresponding to the reconstructed first data, that is, the receiving end subtracts the reconstructed first data corresponding to the second signal. Signal, further, in an implementation manner, when the receiving end acquires the soft symbol corresponding to the first data by the demodulator of the receiving end, the receiving end performs the second signal before demodulating the second signal. Make a cancellation.

It can be understood that, before demodulating the second signal, performing cancellation processing, the second signal can be The interference to other user equipments is removed first, and the noise is suppressed. Therefore, when the second data carried by the third signal is demodulated or decoded, there is no noise interference, and the demodulation or decoding effect is more accurate.

In another implementation manner, when the receiving end acquires the soft symbol corresponding to the first data and obtains the decoder of the receiving end, the receiving end cancels the second signal before decoding the second signal.

It can be understood that the process of demodulation and decoding can suppress the noise in the processed signal to some extent. Therefore, the noise component in the soft symbol obtained after demodulating and decoding the first signal is small. It is more accurate to reconstruct the signal corresponding to the second data according to the decoded soft symbol.

It should be noted that, besides the above-mentioned cancellation of the second signal before demodulation or decoding, the signal cancellation may be performed before and after the other processing of the second signal at the receiving end, that is, the position of the cancellation processing is not Limit, only need to complete the cancellation processing before the second signal is detected at the receiving end.

Step 160: The receiving end processes the third signal to obtain the second data. After the receiving end performs the cancellation processing on the second signal, the third signal is obtained. Optionally, when the second signal is cancelled before demodulation, the receiving end demodulates, decodes, and detects the third signal to obtain the second data. Optionally, when the second signal is cancelled before decoding, the receiving end decodes and detects the third signal to obtain the second data.

By applying the interference suppression method provided by the embodiment of the present invention, the receiving end acquires the soft symbol corresponding to the first data according to the first data of the first user equipment, and reconstructs the signal corresponding to the first data by using the soft symbol, when receiving When the first data and the second data of the second user equipment are used, the first data included in the second data is cancelled according to the signal corresponding to the reconstructed first data, which reduces when the receiving end receives multiple user data. The formed interference reduces the delay of the receiving end cancellation processing and improves the receiving performance of the receiving end.

Another interference suppression method provided by an embodiment of the present invention is described in detail below by using FIG. 2 as an example. FIG. 2 is a flowchart of another method for suppressing interference according to an embodiment of the present invention. In the embodiment of the present invention, an implementation body that performs the following steps is still a receiving end, and may also be implemented by an application module loaded in a receiving end. In the embodiment of the present invention, the receiving end can specifically translate according to the received partial data. The specific process of decoding the entire data block corresponding to the data in advance after the code processing. As shown in FIG. 2, the embodiment specifically includes the following steps:

Step 210: The receiving end receives the first signal, where the first signal carries the first data of the first user equipment.

In the embodiment of the present invention, the first data is specifically part of data of an entire coding block in the transmitting end, that is, the transmitting end divides the data included in the coding block, and each time the signal is sent to the receiving end, in the signal. Carry part of the data of the coded block.

When the sending end needs to request the network access or the related network service from the receiving end, the sending end sends the first signal to the receiving end, and the specific process of the receiving end receiving the first signal may refer to step 110 in the embodiment shown in FIG. 1 . Description, no longer repeat here.

Step 220: The receiving end decodes the first signal to obtain a soft symbol corresponding to the first data.

For details of the step 220, reference may be made to the description of the step 120 in the embodiment shown in FIG. 1, and details are not described herein again.

Step 230: The receiving end acquires a signal corresponding to the second data of the first user equipment according to the soft symbol corresponding to the first data, where the second data and the first data correspond to the same code block.

The second data specifically refers to the other part of the coding block except the first data after the first data is sent, that is, the second data and the first data correspond to the same coding block, and the sending end The data included in the coding block is divided, and each time the signal is transmitted to the receiving end, part of the data of the coding block is carried in the signal.

In this implementation manner, the first signal received by the receiving end is an initial signal sent by the transmitting end, that is, the first signal sent by the transmitting end, and the initial signal carries the first data, where the first data is a coding block. Part of the data, the receiving end decodes the first signal to obtain the first decoding information, that is, the soft information corresponding to the first signal; using the first decoding information and the preset standard demodulation decoding information, the receiving end may Obtaining a first signal to represent a soft symbol of the coding block, where the soft symbol is an overall coding block corresponding to The soft symbol, that is, the receiving end can use the currently received first decoding information and the standard decoding information to decode the entire coding block in advance, and then obtain the soft symbol corresponding to the entire coding block.

The standard decoding information may be preset and stored in the receiving end, and the standard demodulation and decoding information may be a log likelihood ratio of a predetermined corresponding second data in bi t (for example, a preset number) The log likelihood ratio of bi t in the two data is 00000000).

Optionally, the specific process of the receiving end obtaining the first signal to represent the soft symbol of the coding block may be: the receiving end compares the log likelihood ratio of the bit in the first data and the log likelihood ratio of the bi t in the standard decoding information. Combining, obtaining a partial code block, and decoding the partial code block to obtain a log likelihood ratio of the partial code block, and the receiving end uses the same rate matching parameter as the transmitting end to log the logarithm of the partial code block However, the rate matching is performed, and the log likelihood ratio of another partial code block to be sent by the transmitting end is obtained. According to the log likelihood ratio of the obtained two-part code block, the soft information of the entire code block can be obtained, and then the whole is obtained. The soft symbol of the code block.

When the first signal received by the receiving end is a data retransmission signal, the data retransmission signal is specifically a signal sent by the transmitting end that is received by the receiving end after receiving the initial signal, and the data is retransmitted. The signal carries the first data, the first data is part of the data of the coding block, and the receiving end decodes the first signal to obtain the first decoding information; the receiving end may also obtain the sending end that the transmitting end has sent before sending the first signal. a second decoding information of the signal; using the first decoding information and the second decoding information, the receiving end acquires a soft symbol of the first signal characterization code block, where the soft symbol is a soft symbol of the coding block, that is, the receiving end The first decoding information of the currently received signal and the second decoding information of the previously received signal are used for early decoding, and then the soft symbols of the coding block are obtained. The specific processing is similar to the process when the first signal is the initial signal, and is not mentioned here.

Further, the receiving end may obtain the soft symbol corresponding to the first data and the soft symbol of the coding block, and the receiving end may restore the second data in the coding block according to the soft symbol of the whole coding block, and obtain the second data according to the second data. The second data is the other data except the first data in the overall coding block that is sent by the transmitting end again.

Step 240: The receiving end receives a second signal, where the second signal carries the second data and The third data of the second user equipment.

The third data refers to data used by other user equipments to communicate with the receiving end in addition to the data of the first user equipment.

Step 250: The receiving end decodes the second signal.

Step 260: The receiving end cancels the decoded second signal according to the signal corresponding to the second data, to obtain a third signal, where the third signal carries the third data.

The receiving end performs the cancellation processing on the second signal according to the signal corresponding to the second data, that is, the receiving end subtracts the decoded second signal from the second data.

It can be understood that before the second signal is detected, the cancellation processing is performed, and the interference of other users in the second signal can be removed first to achieve noise suppression.

It should be noted that, according to the signal corresponding to the second data, the receiving end does not limit the position of the decoded second signal when canceling, and only needs to perform the cancellation processing before the receiving end detects the second signal. can.

Step 270: The receiving end processes the third signal to obtain the second data. After the receiving end performs the cancellation processing on the second signal, the third signal is obtained, and the receiving end decodes and detects the third signal to obtain the second data.

By applying the interference suppression method provided by the embodiment of the present invention, the receiving end decodes the first signal carrying the partial data of the coding block, acquires the soft symbol of the first signal, and obtains the soft corresponding to the coding block according to the soft symbol of the first signal. symbol. The receiver may obtain a signal corresponding to the second data of the coded block that is not sent by the transmitting end by performing the early decoding of the coded block. When the signal with the second data is actually received, the second signal may be paired before the detecting. Eliminate, reduce the interference formed when the receiving end receives multiple user data, reduce the delay of the cancellation processing, and improve the receiving performance of the receiving end.

Correspondingly, the embodiment of the present invention further provides an interference suppression apparatus, which may be used to implement the interference suppression method in the foregoing embodiment, and the specific implementation process of each unit function in the apparatus may refer to corresponding steps in the foregoing method embodiment. The description is only briefly described here. The device described in the embodiment of the present invention may be a base station, or some functional modules of the base station, such as a radio remote unit. As shown in FIG. 3, the apparatus includes: a receiving unit 310, an obtaining unit 320, a reconstructing unit 330, a canceling unit 340, and a processing unit 350.

The receiving unit 310 is included in the device, and is configured to receive a first signal, where the first signal carries first data of the first user equipment;

The obtaining unit 320 is configured to acquire a soft symbol corresponding to the first data.

The reconstruction unit 330 is configured to reconstruct a signal corresponding to the first data according to the soft symbol; the reconstruction unit 33G performs soft modulation, spreading, scrambling, and the like on the soft symbol, according to channel estimation and multipath search. As a result, the signal corresponding to the first data is reconstructed.

The receiving unit 310 is further configured to receive a second signal, where the second signal carries the first data and the second data of the second user equipment;

The canceling unit 340 is configured to: cancel, according to the reconstructed signal corresponding to the first data, the second signal, to obtain a third signal, where the third signal carries the second data;

The cancellation unit 340 is specifically configured to subtract the signal corresponding to the reconstructed first data from the second signal.

The processing unit 350 is configured to process the third signal to obtain the second data.

The obtaining unit 320 is specifically configured to: perform soft decision on the first data, obtain the soft symbol, demodulate the first data, complete a soft decision, and obtain the soft symbol.

The cancellation unit 340 is specifically configured to cancel the second signal before demodulating the second signal.

It can be understood that before the demodulation of the second signal, the cancellation processing is performed, and the interference of the other user equipment in the second signal can be removed first to implement the suppression of the noise, and therefore, carried in the subsequent third signal. When the second data is demodulated or decoded, there is no noise interference, and the demodulation or decoding effect is more accurate.

The processing unit 350 is specifically configured to perform demodulation, decoding, and detection on the third signal. The obtaining unit 320 is specifically configured to: demodulate and decode the first data to obtain the soft symbol. It can be understood that the process of demodulation and decoding can suppress the noise in the processed signal to some extent. Therefore, the noise component in the soft symbol obtained after demodulating and decoding the first signal is small. It is more accurate to reconstruct the signal corresponding to the second data according to the decoded soft symbol.

The cancellation unit 340 is specifically configured to cancel the second signal before decoding the second signal.

The processing unit 350 is specifically configured to decode and detect the third signal.

The receiving unit 31 is specifically configured to: demodulate or decode the first signal, and obtain soft information of the first user equipment;

The obtaining unit 320 is specifically configured to acquire the soft symbol according to the soft information.

Therefore, by applying the interference suppression apparatus provided by the embodiment of the present invention, the receiving end acquires the soft symbol corresponding to the first data according to the first data of the first user equipment, and reconstructs the signal corresponding to the first data by using the soft symbol. Receiving the second data having the first data and the second user equipment, canceling the first data included in the second data according to the signal corresponding to the reconstructed first data, reducing receiving the plurality of users by the receiving end The interference formed during the data reduces the delay of the cancellation processing and improves the receiving performance of the receiving end.

Correspondingly, the embodiment of the present invention further provides another interference suppression apparatus, which may be used to implement the interference suppression method in the foregoing embodiment. The specific implementation process of the functions of each unit in the apparatus may refer to the foregoing method embodiment. The description of the corresponding steps is only briefly described herein. The apparatus described in the embodiments of the present invention may be a base station, or some functional modules of the base station, such as a radio remote unit.

As shown in FIG. 4, the apparatus includes a receiving unit 41 0, a decoding unit 420, an obtaining unit 430, a canceling unit 440, and a processing unit 450.

The receiving unit 41 0 is configured to receive the first signal, where the first signal carries the first data of the first user equipment;

The decoding unit 420 is configured to decode the first signal to obtain a soft symbol corresponding to the first data.

The decoding unit 420 is further configured to: acquire soft information of the first data, according to the soft letter. Get the soft symbol.

The acquiring unit 430 is configured to acquire, according to the soft symbol corresponding to the first data, a signal corresponding to the second data of the first user equipment, where the second data and the first data correspond to the same code block.

In this implementation manner, the first signal received by the receiving end is an initial signal sent by the transmitting end, that is, the first signal sent by the transmitting end, and the initial signal carries the first data, where the first data is a coding block. Part of the data, the receiving end decodes the first signal to obtain the first decoding information, that is, the soft information corresponding to the first signal; using the first decoding information and the preset standard demodulation decoding information, the receiving end may Obtaining, by the first signal, a soft symbol of the coding block, where the soft symbol is a soft symbol corresponding to the whole coding block, that is, the receiving end can advance the coding block as a whole by using the currently received first decoding information and standard decoding information. Decoding, and then obtaining soft symbols corresponding to the entire coding block.

When the first signal received by the receiving end is a data retransmission signal, the data retransmission signal is specifically a signal sent by the transmitting end that is received by the receiving end after receiving the initial signal, and the data is retransmitted. The signal carries the first data, the first data is part of the data of the coding block, and the receiving end decodes the first signal to obtain the first decoding information; the receiving end may also obtain the sending end that the transmitting end has sent before sending the first signal. a second decoding information of the signal; using the first decoding information and the second decoding information, the receiving end acquires a soft symbol of the first signal characterization code block, where the soft symbol is a soft symbol of the coding block, that is, the receiving end The first decoding information of the currently received signal and the second decoding information of the previously received signal are used for early decoding, and then the soft symbols of the coding block are obtained.

The receiving unit 410 is further configured to receive a second signal, where the second signal carries the second data and the third data of the second user equipment.

The decoding unit 420 is further configured to decode the second signal.

The canceling unit 440 is configured to cancel the decoded second signal according to the signal corresponding to the second data, to obtain a third signal, where the third signal carries the third data.

The cancellation unit 440 is specifically configured to: subtract the signal corresponding to the second data from the decoded second signal. The processing unit 450 is configured to process the third signal to obtain the second data.

In addition, the interference suppression device provided by the foregoing embodiment may also be implemented as follows to implement the interference suppression method in the foregoing embodiments of the present invention, and the specific implementation process of each device function in the device may refer to other implementations in the specification. The corresponding content in the example is only briefly described herein. As shown in FIG. 5, the apparatus includes: a network interface 51 0, a processor 520, and a memory 530. System bus 540 is used to connect network interface 51 0, processor 520, and memory 530.

The network interface 51 0 is used for communication connection with the transmitting end.

Memory 530 can be a persistent storage, such as a hard drive and flash memory, and memory 530 is used to store applications, the application including instructions that can be used to cause processor 520 to perform the following process:

Receiving a first signal, where the first signal carries first data of the first user equipment;

Obtaining a soft symbol corresponding to the first data;

Reconstructing a signal corresponding to the first data according to the soft symbol;

Receiving a second signal, where the second signal carries the first data and the second data of the second user equipment;

Decoding the second signal according to the reconstructed signal corresponding to the first data, to obtain a third signal, where the third signal carries the second data;

Processing the third signal to obtain the second data.

Further, the application stored by the memory 530 can be used to cause the processor 520 to execute an instruction to cancel the second signal as: Subtracting the reconstructed signal corresponding to the first data from the second signal. Further, the application stored by the memory 530 can be used to cause the processor 520 to execute an instruction to acquire a soft symbol process corresponding to the first data: the soft symbol is soft-decisive by a demodulator of the device obtain;

Further, the application stored by the memory 530 can be used to cause the processor 520 to execute an instruction to cancel the second signal to: the second signal before demodulating the second signal Make a cancellation.

Further, the application stored by the memory 530 can be used to cause the processor 520 to execute an instruction to process the third signal to: demodulate, decode, and detect the third signal.

Further, the application stored by the memory 530 can be used to cause the processor 520 to execute an instruction to acquire a soft symbol process corresponding to the first data: the soft symbol is obtained by a decoder of the device;

Further, the application stored by the memory 530 can be used to cause the processor 520 to perform an instruction to cancel the second signal to: the second signal before decoding the second signal Make a cancellation.

Further, the application stored by the memory 530 can be used to cause the processor 520 to execute an instruction to process the third signal to: decode and detect the third signal.

Further, the application stored by the memory 530 can be used to cause the processor 520 to execute an instruction to receive the first signal process: demodulating or decoding the first signal, acquiring the first user equipment Soft information

Further, the application stored by the memory 530 can be used to cause the processor 520 to execute an instruction to acquire a soft symbol process corresponding to the data of the first user equipment: acquiring the soft symbol according to the soft information.

Therefore, by applying the interference suppression apparatus provided by the embodiment of the present invention, the receiving end acquires the soft symbol corresponding to the first data according to the first data having the first user equipment, and reconstructs the soft symbol by using the soft symbol. a data corresponding to the data, when receiving the second data having the first data and the second user equipment, canceling, according to the signal corresponding to the reconstructed first data, the first data included in the second data, reducing The interference formed when the receiving end receives a plurality of user data reduces the delay of the cancellation processing and improves the receiving performance of the receiving end.

In addition, the interference suppression device provided by the foregoing embodiment may also be implemented as follows to implement the interference suppression method in the foregoing embodiments of the present invention, and the specific implementation process of each device function in the device may refer to the foregoing embodiment. The corresponding content is only briefly described here. As shown in FIG. 6, the apparatus includes: a network interface 61 0, a processor 620, and a memory 630. The system bus 640 is used to connect the network interface 61 0, the processor 620, and the memory 6 30.

The network interface 61 0 is used for communication connection with the transmitting end.

Memory 630 can be a persistent storage, such as a hard drive and flash memory, and storage 630 is used to store applications, the application including instructions that can be used to cause processor 620 to perform the following processes:

Network Interface;

Processor

Memory

An application physically stored in the memory, the application including instructions operable to cause the processor to perform the following process:

Decoding the first signal to obtain a soft symbol corresponding to the first data;

Acquiring, according to the soft symbol corresponding to the first data, a signal corresponding to the second data of the first user equipment, where the second data and the first data correspond to the same code block;

Receiving a second signal, where the second signal carries the second data and third data of the second user equipment;

Decoding the second signal;

Decoding the decoded second signal according to the signal corresponding to the second data, To the third signal, the third signal carries the third data;

Processing the third signal to obtain the second data.

Further, the application stored by the memory 630 can be used to cause the processor 620 to perform an instruction to cancel the decoded second signal by: subtracting the decoded second signal from the decoded A signal corresponding to the second data.

Further, the application stored by the memory 630 can be used to cause the processor 620 to process the process of receiving the first signal as: acquiring soft information of the first data, and acquiring the soft symbol according to the soft information. .

By applying the interference suppression apparatus provided by the embodiment of the present invention, by using the interference suppression method provided by the embodiment of the present invention, the receiving end decodes the first signal carrying the data of the coded block part, and obtains the soft symbol of the first signal, according to the A soft symbol of a signal obtains a soft symbol corresponding to the coded block. The receiver may obtain a signal corresponding to the second data of the coded block that is not sent by the transmitting end by performing the early decoding of the coded block. When the signal with the second data is actually received, the second signal may be paired before the detecting. Eliminate, reduce the interference formed when the receiving end receives multiple user data, reduce the delay of the cancellation processing, and improve the receiving performance of the receiving end.

It should be noted that, in the embodiment of the present invention, the first signal, the second signal, and the third signal; the first user, the second user, the first data, the second data, and the like are used for illustration only, and the meaning may be according to the context. It is to be understood that there is no limitation in the order of the embodiments, and there is no limitation to the implementation of the embodiments of the present invention.

A person skilled in the art should further appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention. The steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. Software modules can be placed in random access memory

(RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage known in the art. In the medium.

The above described embodiments of the present invention are further described in detail, and the embodiments of the present invention are intended to be illustrative only. The scope of the protection, any modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

claims

1. An interference suppression device, characterized in that the device includes:

A receiving unit, configured to receive a first signal, the first signal carrying the first » of the first user equipment;

An acquisition unit, configured to acquire the soft symbol corresponding to the first data;

a reconstruction unit, configured to reconstruct a signal corresponding to the first data according to the soft symbol; the receiving unit is further configured to receive a second signal, the second signal carrying the first data and the second Secondary data from the user device;

A cancellation unit configured to cancel the second signal according to the reconstructed signal corresponding to the first data to obtain a third signal, where the third signal carries the second data;

A processing unit, configured to process the third signal and obtain the second data.

2. The device according to claim 1, wherein the cancellation unit is specifically configured to subtract the signal corresponding to the reconstructed first data from the second signal.

3. The device according to claim 1 or 2, characterized in that the acquisition unit is specifically used to demodulate the first data, complete soft decision, and obtain the soft symbol;

4. The device according to claim 3, wherein the processing unit is specifically configured to demodulate, decode and detect the third signal.

5. The device according to claim 1 or 2, wherein the acquisition unit is specifically configured to demodulate and decode the first data to obtain the soft symbol;

6. The device according to claim 5, wherein the processing unit is specifically configured to decode and detect the third signal.

7. The device according to claim 1, characterized in that, the receiving unit is specifically used to, Demodulate or decode the first signal to obtain soft information of the first user equipment; the obtaining unit is specifically configured to obtain the soft symbol according to the soft information.

8. An interference suppression device, characterized in that the device includes:

A decoding unit, configured to decode the first signal and obtain the soft symbol corresponding to the first data; an acquisition unit, configured to obtain the soft symbol corresponding to the first data according to the soft symbol corresponding to the first data. A signal corresponding to two data, the second data and the first data corresponding to the same encoding block; the receiving unit is also used to receive a second signal, the second signal carries the second data and the second Third data of the user device;

The decoding unit is also used to decode the second signal;

A cancellation unit configured to cancel the decoded second signal according to the signal corresponding to the second data to obtain a third signal, where the third signal carries the third data;

9. The device according to claim 8, wherein the cancellation unit is specifically configured to subtract the signal corresponding to the second data from the decoded second signal.

10. The device according to claim 8 or 9, characterized in that the decoding unit is specifically configured to obtain soft information of the first data, and obtain the soft symbols according to the soft information.

11. An interference suppression method, characterized in that the method includes:

The receiving end receives a first signal, where the first signal carries first data of the first user equipment; the receiving end obtains a soft symbol corresponding to the first data;

The receiving end reconstructs the signal corresponding to the first data according to the soft symbol;

The receiving end receives a second signal, and the second signal carries the first data and second data of the second user equipment;

The receiving end cancels the second signal according to the reconstructed signal corresponding to the first data to obtain a third signal, where the third signal carries the second data; The receiving end processes the third signal to obtain the second data.

12. The method according to claim 11, wherein the canceling the second signal specifically includes: the receiving end subtracting the reconstructed third signal from the second signal. A signal corresponding to data.

13. The method according to claim 11 or 12, characterized in that: the receiving end obtains the soft symbols corresponding to the first data specifically includes: the soft symbols are subjected to soft decision by the demodulator of the receiving end. get;

The cancellation of the second signal specifically includes: the receiving end canceling the second signal before demodulating the second signal.

14. The method according to claim 13, wherein the receiving end processing the third signal specifically includes: the receiving end demodulating, decoding and detecting the third signal.

15. The method according to claim 11 or 12, characterized in that, the receiving end obtaining the soft symbols corresponding to the first data specifically includes: the soft symbols are paid by the decoder of the receiving end;

The cancellation of the second signal specifically includes: the receiving end canceling the second signal before decoding the second signal.

16. The method according to claim 15, wherein the receiving end processing the third signal specifically includes: the receiving end decoding and detecting the third signal.

17. The method according to claim 11, characterized in that, the receiving end receiving the first signal specifically includes: the receiving end demodulating or decoding the first signal, and obtaining the first data soft information;

The receiving end obtaining the soft symbol corresponding to the first data specifically includes: the receiving end obtaining the soft symbol according to the soft information.

18. An interference suppression method, characterized in that the method includes:

The receiving end receives a first signal, where the first signal carries first data of the first user equipment; the receiving end decodes the first signal to obtain soft symbols corresponding to the first data; The receiving end obtains the signal corresponding to the second data of the first user equipment according to the soft symbol corresponding to the first data, and the second data corresponds to the same coding block as the first data; the receiving The terminal receives a second signal, where the second signal carries the second data and third data of the second user equipment;

The receiving end decodes the second signal;

The receiving end cancels the decoded second signal according to the signal corresponding to the second data to obtain a third signal, where the third signal carries the third data;

The receiving end processes the third signal to obtain the second data.

19. The method according to claim 18, wherein the canceling the decoded second signal specifically includes: the receiving end subtracting the decoded second signal from the decoded second signal. the signal corresponding to the second data.

20. The method according to claim 18 or 19, characterized in that, the receiving end receiving the first signal specifically includes:

The receiving end decodes the first signal and obtains the soft information of the first data; the receiving end obtains the soft symbols corresponding to the first data specifically includes: the receiving end performs decoding according to the soft information Get the soft symbol.