WO2012109971A1 - 一种干扰消除处理方法及设备 - Google Patents
一种干扰消除处理方法及设备 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
- H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
- H03M13/09—Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
Definitions
- the present invention relates to a wireless communication technology, and in particular, to a interference cancellation processing method and apparatus. Background technique
- Uplink MU-MIMO Multi-User MIMO, Multi-User MIMO; MIMO: Multiple Input Multiple
- Output, multiple input and multiple output is a virtual MIMO system, that is, each terminal sends one data stream, but two or more data streams occupy the same time-frequency resource, so from the receiving end, these are different
- the data stream of the terminal can be regarded as the data stream from different antennas on the same terminal, thus forming a MIMO system.
- MU-MIMO the signals are from different terminals, and the independence between channels is easily obtained.
- the receiving end uses multiple antennas to cancel and zero-sink the data stream to achieve the purpose of data stream separation.
- the received signals of two codewords that have experienced different fading can pass MUD (Multi-User Detection, multi-user detection; MUD is understood as multi-user detection from English translation, but this method utilizes information of different users, usually called multi-user User joint detection)
- MUD Multi-User Detection, multi-user detection; MUD is understood as multi-user detection from English translation, but this method utilizes information of different users, usually called multi-user User joint detection
- the algorithm performs reception processing to obtain a certain performance gain.
- the traditional method for detecting multiple data streams occupying the same time-frequency resource is the joint detection algorithm mentioned above.
- the algorithm is a linear algorithm with low implementation complexity, but due to the existence of the interference information, it is inevitable to bring about performance loss.
- uplink MU-MIMO different users use different orthogonal codes to distinguish, but due to the influence of fading channels, there is interference between users.
- the existing linear MUD algorithm only makes full use of effective information for interference. Information cannot be deleted, so the performance of the algorithm is not ideal.
- the technical problem to be solved by the present invention is to provide a method and a device for eliminating interference cancellation, which are used to solve the problem of interference cancellation when multiple data streams occupy the same time-frequency resource.
- An embodiment of the present invention provides a method for canceling interference cancellation, including the following steps:
- the data stream signal with good detection performance is reconstructed, and the reconstructed data stream signal is subtracted from the received signal.
- An embodiment of the present invention provides a interference cancellation processing apparatus, including:
- a CRC check module configured to determine a CRC check information of the data stream signal when the data stream signal is transmitted by using the same time-frequency resource
- a signal determining module configured to determine, according to the CRC check information, a data stream signal with good detection performance
- the elimination processing module is configured to reconstruct the data stream signal with good detection performance, and subtract the reconstructed data stream signal from the received signal.
- the technical solution provided by the embodiment of the present invention has low computational complexity. Compared with the ideal ML algorithm and the Turbo-SIC algorithm, the performance of the algorithm is close to the ideal algorithm, and the complexity is low and easy to implement. DRAWINGS
- FIG. 1 is a schematic flowchart of an implementation process of a interference cancellation processing method according to an embodiment of the present invention
- FIG. 2 is a schematic block diagram of a basic principle of a CRC-based SIC algorithm on an uplink eNodeB side according to an embodiment of the present invention
- FIG. 3 is a schematic flowchart of a CRC-based SIC algorithm on an uplink eNodeB side according to an embodiment of the present invention
- FIG. 4 is a schematic block diagram showing a basic principle of a CRC-based SIC algorithm on a downlink UE side according to an embodiment of the present invention
- FIG. 5 is a schematic flowchart of a CRC-based SIC algorithm on a downlink UE side according to an embodiment of the present invention
- FIG. 6 is a schematic structural diagram of a interference cancellation processing apparatus according to an embodiment of the present invention. detailed description
- the spectrum resources are limited. Both the mobile terminal and the station equipment need to improve the frequency band utilization of the system under the premise of the existing spectrum resource allocation rules, and improve the system itself.
- the competitiveness of the wireless market From the second generation (2G) to the third generation (3G), fourth generation (4G) cellular mobile communication systems, especially in the quasi-4G system represented by the LTE (Long Term Evolution) system, The spectrum utilization efficiency of the system itself becomes a very critical factor.
- the LTE system introduces multi-antenna technology.
- the enhanced frequency language uses the MU-MIMO technology for the shared frequency band resources in the uplink, and the SDM (SDM) that uses the spatial multiplexing technology is used in the downlink.
- SDM SDM
- the received signals of two data streams that have experienced different fading can be calculated by joint detection (MUD)
- the method performs reception processing to obtain a certain performance gain.
- an SIC (Successive Interference Cancellation) algorithm suitable for multi-stream partial feedback interference cancellation is proposed in the embodiment of the present invention. Due to the independence of the channel experienced by the two data streams, the detection performance of the MUD algorithm at the receiving end will be different. In order to utilize the different detection results of the received signals of the codeword (that is, if thousands of codewords are correctly detected and another thousand codewords are present) In the case of detecting an error, the codeword signal with good detection performance is reconstructed and subtracted from the received signal, which reduces the interference of the originally detected error code word. The algorithm has low implementation complexity and can greatly improve system performance. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.
- FIG. 1 is a schematic diagram of an implementation process of a method for canceling a interference cancellation process. As shown in the figure, the following steps may be included:
- Step 101 Determine a CRC of the data stream signal when occupying the same time-frequency resource for performing multiple data stream signal transmissions
- Step 102 Determine, according to the CRC check information, a data stream signal with good detection performance; that is, the detection performance of the determined data stream signal is better than the detection performance of the undetermined data stream signal;
- Step 103 Reconstruct the data stream signal with good detection performance, and subtract the reconstructed data stream signal from the received signal.
- determining the data stream signal with good detection performance according to the CRC check information may include:
- the correct data stream is a data stream signal with good detection performance.
- the technical solution provided by the embodiment of the present invention is to: introduce feedback by using CRC check information, reconstruct a correct useful signal, and reduce interference of the received signal. Due to the independence of the channel experienced by different data stream signals, the detection performance of the MUD algorithm at the receiving end will be different. From the perspective of statistical probability, in general, due to the independence of the received signal, the detection of one-to-one error is Inevitably, in order to utilize different detection results of the received signal, there is a case where one data stream signal is correctly detected and the other data stream signal is detected incorrectly, and then the data stream signal with better detection performance is reconstructed, and The subtraction in the received signal reduces the interference of another data stream in effect.
- the embodiment of the present invention is to solve how to improve the detection performance of a part of the data stream signal with poor detection performance. Therefore, in the embodiment of the present invention, when the partial data stream signal with poor detection performance is detected, the reconstructed data stream signal is subtracted from the received signal, that is, the data stream signal with better detection performance is subtracted, and the effect is obtained. From the above point of view, the interference of another data stream is reduced. Thereby improving the detection performance.
- determining the CRC check information of the data stream signal may be determined after receiving the processing operation at the receiving end.
- the following describes how to implement the processing on the eNodeB (Evolved Node B) side and the UE (User Equipment) side.
- the method further includes: detecting the received data stream signal after removing the interference, IDFT (Inverse Discrete Fourier Transform, discrete Fourier transform) Inverse transform) Transform, demodulate, descramble, and decode the data stream signal separately.
- IDFT Inverse Discrete Fourier Transform, discrete Fourier transform
- Inverse transform Transform
- FIG. 2 is a schematic block diagram of the basic principle of the CRC-based SIC algorithm on the uplink eNodeB side.
- the processing on the uplink eNodeB side may be: After receiving the channel, different users pass the receiving processing operation at the receiving end (Cyclic Prefix, Cyclic Prefix) ), DFT (Discrete Fourier Transform), MUD detection, IDFT (Inverse Discrete Fourier Transform), decoding, etc., after adding CRC detection, symbol reconstruction, thousand Interference cancellation, IDFT, decoding process.
- the SISO in the figure is Single Input Single Output. For the data stream, each data stream is separately demodulated and decoded, so it can be called single stream detection.
- Figure 3 is a schematic diagram of the CRC-based SIC algorithm on the eNodeB side. As shown in the figure, the uplink algorithm flow can be summarized as the following steps:
- the method further includes:
- the received data stream signal after the interference is removed is detected, demodulated, descrambled, and the data stream signal is decoded.
- the processing on the downlink UE side may be: After the different codeword signal streams pass through the channel, the receiving processing operation is performed at the receiving end (de-CP, DFT, After MUD detection, decoding, etc., CRC detection, symbol reconstruction, interference cancellation, and decoding process are added.
- FIG. 5 is a schematic flowchart of a CRC-based SIC algorithm on the downlink UE side. As shown in the figure, the downlink algorithm flow can be summarized as the following steps:
- the interference cancellation process reduces the reconstructed signal from the received signal
- the embodiment of the present invention further provides a interference cancellation processing device. Since the principle of solving the problem is similar to the method for canceling the interference cancellation, the implementation of the device can be implemented by referring to the method. It will not be repeated here.
- Figure 6 is a schematic diagram of the structure of the interference cancellation processing device. As shown in the figure, the device may include:
- the CRC check module 601 is configured to determine CRC check information of the data stream signal when the data stream signal is transmitted by using the same time-frequency resource;
- the signal determining module 602 is configured to determine, according to the CRC check information, a data stream signal with good detection performance
- the elimination processing module 603 is configured to reconstruct the data stream signal with good detection performance, and subtract the reconstructed data stream signal from the received signal.
- the signal determining module may be further configured to determine, when the data stream signal with good detection performance is determined according to the CRC check information, if the detection result of the data stream is detected correctly, and the other data stream detection result is a detection error, determining Detecting the correct data stream is a data stream signal with good performance.
- the signal determining module may be further configured to determine CRC calibration information of the data stream signal after receiving the processing operation at the receiving end.
- the method when the device is located in the eNodeB, the method further includes:
- a first post-processing module configured to: after subtracting the reconstructed data stream signal from the received data stream signal, detecting, IDFT transforming, demodulating, descrambling, and respectively removing the interfered data stream signal Decoding the data stream signal.
- the method when the device is located on the UE side, the method further includes:
- a second post-processing module configured to: after subtracting the reconstructed data stream signal from the received data stream signal, detecting, demodulating, and descrambling the data stream signal after the interference is removed, and performing data stream signal on the data stream signal The decoding process.
- the technical solution provided by the present invention is that the CRC check information is used, feedback is introduced, the correct useful signal is reconstructed, and the interference of the received signal is reduced, which can be extended to all multi-antenna systems.
- the verification information is used in the scheme.
- the decoding may not be performed.
- other forms of using the decoding information may be used.
- the scheme is applicable to both uplink and downlink, and is also applicable to uplink SDMA (Spatial Divison Multiple Access, Space division multiple access (AP) scheme, downlink dual stream BF (beam forming) and other systems and transmission modes that utilize multi-antenna technology to achieve spatial resource reuse.
- SDMA Spatial Divison Multiple Access, Space division multiple access (AP) scheme
- AP Space division multiple access
- BF beam forming
- the technical solution provided by the embodiment of the invention has low computational complexity. Compared with MUD, the complexity is increased by 2-3 times; however, compared with the ideal ML algorithm and Turbo-SIC algorithm, the performance of this algorithm is close to the ideal algorithm, and the complexity is easy to implement.
- CRC decoding is an operation necessary for LTE systems. This algorithm makes appropriate use of decoding information. For non-LTE systems or systems that do not use CRC code, other translations can be used. The form of the code information.
- embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is in the form of a computer program product embodied on one or more computer usable storage modules (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
- computer usable storage modules including but not limited to disk storage, CD-ROM, optical storage, etc.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
本申请公开了一种干扰消除处理方法及设备,包括:在占用相同时频资源进行多个数据流信号传输时,确定数据流信号的循环冗余校验校验信息;根据循环冗余校验校验信息确定检测性能好的数据流信号;将检测性能好的数据流信号进行重构,并从接收信号中减掉重构后的数据流信号。本申请计算复杂度低,相对于理想的最大似然算法以及Turbo-SIC算法,此算算法性能已经接近理想算法,复杂度易于实现。
Description
一种干扰消除处理方法及设备 本申请要求在 2011年 2月 14日提交中国专利局、 申请号为 201110037558.3、 发明名称为" 一种千扰消除处理方法及设备"的中国专利申请的优先权,其全部内容通过引用结合在本申请 中。 技术领域
本发明涉及无线通信技术, 特别涉及一种千扰消除处理方法及设备。 背景技术
上行 MU-MIMO ( Multi-User MIMO , 多用户 MIMO; MIMO: Multiple Input Multiple
Output, 多入多出)是一个虚拟的 MIMO系统, 即每一个终端均发送一个数据流, 但是两个 或者更多的数据流占用相同的时频资源, 这样从接收端来看, 这些来自不同终端的数据流, 可以被看作来自同一个终端上不同天线的数据流, 从而构成一个 MIMO 系统。 对于 MU-MIMO , 信号是来自于不同终端的, 容易获得信道之间的独立性。
下行 MIMO , 当基站将占用相同时频资源的多个数据流发送给同一个用户时, 接收端利 用多根天线对千扰数据流进行取消和零陷, 达到数据流分离的目的。
经历了不同衰落的两个码字的接收信号可以通过 MUD ( Multi-User Detection, 多用户检 测; MUD从英文翻译理解为多用户检测, 但是这种方法利用了不同用户的信息, 通常也叫做 多用户联合检测) 算法进行接收处理, 获得一定的性能增益。
传统的解决多个数据流占用相同的时频资源的检测方法为前文提到的联合检测算法
( MUD算法), 该算法是一种线性算法, 实现复杂度低, 但是由于千扰信息的存在, 不可避 免的带来性能上的损失。 比如上行 MU-MIMO , 不同用户通过不同的正交码来进行区分, 但 由于衰落信道的影响, 各用户之间存在千扰, 现有的线性的 MUD算法只是充分的利用有效 信息, 对于千扰信息不可能删除, 因此算法的性能不是 4艮理想。
为了获得更优的性能, 可以考虑釆用 ML ( Maximum Likelihood, 最大似然)检测, 但是
ML 的复杂度几乎是不可能实现的, 于是有人提出将译码器与检测器结合, 两者之间通过迭 代交互外信息来提高检测数据的先验信息, 由于检测器捕获了额外的译码增益, 因此其性能 一般优于或者逼近 ML检测, 但是仍然计算量比较大, 不适宜实时实现。
因此, 现有的多个数据流占用相同的时频资源的检测方法还存在一些问题, 需要在原有 的基础上改进算法, 为了便于实现, 尽量在低复杂度的前提下实现高的性能。 发明内容
本发明所解决的技术问题在于提供了一种千扰消除处理方法及设备, 用以解决在多个数 据流占用相同的时频资源时的千扰消除问题。
本发明实施例中提供了一种千扰消除处理方法, 包括如下步骤:
在占用相同时频资源进行多个数据流信号传输时, 确定数据流信号的 CRC校验信息; 根据 CRC校验信息确定检测性能好的数据流信号;
将检测性能好的数据流信号进行重构, 并从接收信号中减掉重构后的数据流信号。
本发明实施例中提供了一种千扰消除处理设备, 包括:
CRC校验模块, 用于在占用相同时频资源进行多个数据流信号传输时, 确定数据流信号 的 CRC校验信息;
信号确定模块, 用于根据 CRC校验信息确定检测性能好的数据流信号;
消除处理模块, 用于将检测性能好的数据流信号进行重构, 并从接收信号中减掉重构后 的数据流信号。
本发明有益效果如下:
本发明实施例提供的技术方案, 计算复杂度低, 相对于理想的 ML算法以及 Turbo-SIC 算法, 此算法性能已经接近理想算法, 复杂度较低, 易于实现。 附图说明
图 1为本发明实施例中千扰消除处理方法实施流程示意图;
图 2为本发明实施例中上行 eNodeB侧基于 CRC的 SIC算法基本原理示意框图; 图 3为本发明实施例中上行 eNodeB侧基于 CRC的 SIC算法流程示意图;
图 4为本发明实施例中下行 UE侧基于 CRC的 SIC算法基本原理示意框图;
图 5为本发明实施例中下行 UE侧基于 CRC的 SIC算法流程图示意图;
图 6为本发明实施例中千扰消除处理设备结构示意图。 具体实施方式
在目前的移动通信系统中, 频谱资源是受限的, 无论是移动终端还^ &站设备, 都需要 在现有的频谱资源分配规则的前提下, 提升系统的频带利用率, 提高系统本身在无线市场的 竟争力。 从第二代(2G )到第三代(3G )、 第四代(4G )蜂窝移动通信系统中, 尤其是在以 LTE ( Long Term Evolution, 长期演进) 系统为代表的准 4G系统中, 提升系统本身的频谱利 用效率成为非常关键的因素。为了提升频带利用率, LTE系统引入了多天线技术,在目前 LTE 系统提出的提升频语对于上行釆用了共享频带资源的 MU-MIMO技术, 下行釆用了利用空间 复用技术的 SDM ( Spatial Division Multiplexing , 空分复用)传输模式。 无论是 MU-MIMO技 术还是 SDM技术, 经历了不同衰落的两个数据流的接收信号可以通过联合检测 ( MUD ) 算
法进行接收处理, 获得一定的性能增益。
为了进一步提高算法性能, 本发明实施例中提出了一种适用于多流的部分反馈千扰消除 的 SIC ( Successive Interference Cancellation, 串行千扰消除)算法。 由于两个数据流所经历信 道的独立性, 接收端的 MUD算法检测性能会有不同, 为了利用码字接收信号的不同检测结 果(即会存在若千个码字被正确检测而另外若千码字检测错误的情况), 将检测性能较好的码 字信号进行重构, 并从接收信号中减掉, 从效果上来看降低了原本检测错误的码字所受的千 扰。 该算法实现复杂度低, 能够极大的提升系统性能。 下面结合附图对本发明的具体实施方 式进行说明。
图 1为千扰消除处理方法实施流程示意图, 如图所示, 可以包括如下步骤:
步骤 101、 在占用相同时频资源进行多个数据流信号传输时, 确定数据流信号的 CRC
( Cyclic Redundancy Check, 循环冗余校-验 )校 -验信息;
步骤 102、 根据 CRC校验信息确定检测性能好的数据流信号; 即, 确定的数据流信号的 检测性能优于未确定的数据流信号的检测性能;
步骤 103、 将检测性能好的数据流信号进行重构, 并从接收信号中减掉重构后的数据流 信号。
实施中, 根据 CRC校验信息确定检测性能好的数据流信号可以包括:
在存在若千数据流检测结果为检测正确, 且另外若千数据流检测结果为检测错误时, 确 定检测正确的数据流为检测性能好的数据流信号。
具体的, 本发明实施例提供的技术方案的构思在于: 利用 CRC的校验信息, 引入反馈, 重构正确的有用信号, 降低接收信号的千扰。 由于不同数据流信号所经历信道的独立性, 接 收端的 MUD算法检测性能会有不同, 从统计概率的角度来分析, 一般情况下, 由于接收信 号的独立性, 检测出现一对一错的情况是必然存在的, 为了利用接收信号的不同检测结果, 即会存在一个数据流信号被正确检测而另一个数据流信号检测错误的情况, 然后将检测性能 较好的数据流信号进行重构, 并从接收信号中减掉, 从效果上来看降低了另一个数据流所受 的千扰。
由于接收到的是多路数据流信号, 所以期望能够准确的检测出每路数据流信号。 在 CRC 校验过程中有部分数据流信号的检测性能较优,对这部分数据流信号可进行后续的应用。 则, 本发明实施例要解决的是对于检测性能较差的部分数据流信号如何提高其检测性能。 因此, 本发明实施例在对检测性能较差的部分数据流信号进行检测时, 从接收信号中减掉重构后的 数据流信号, 也就是减掉检测性能较优的数据流信号, 从效果上来看降低了另一个数据流所 受的千扰。 从而提高了检测性能。
实施中,确定数据流信号的 CRC校验信息可以是在接收端通过接收处理操作后进行确定 的。
下面将分别通过 eNodeB ( Evolved Node B , 演进基站 )侧及 UE ( User Equipment , 用户 设备)侧的处理来说明如何具体实施。
一、在 eNodeB侧从接收信号中减掉重构后的数据流信号后, 还可以进一步包括: 对去掉千扰后的接收的数据流信号进行检测、 IDFT ( Inverse Discrete Fourier Transform, 离散傅里叶逆变换) 变换、 解调、 解扰, 并分别对数据流信号进行译码过程。
图 2为上行 eNodeB侧基于 CRC的 SIC算法基本原理示意框图,如图所示,上行 eNodeB 侧的处理可以为: 不同用户经过信道后在接收端通过接收处理操作 (去 CP ( Cyclic Prefix , 循环前缀), DFT ( Discrete Fourier Transform, 离散傅里叶变换), MUD检测, IDFT ( Inverse Discrete Fourier Transform, 离散傅里叶逆变换), 译码等过程)后, 增加了 CRC检测, 符号 重构,千扰消除, IDFT,译码过程。图中的 SISO为单输入单输出( Single Input Single Output ), 对于数据流是每个数据流是单独解调译码的, 所以可以称为单流检测。
基于以上对原理的表述以及对原理框图的说明, 下面结合具体的算法流程进行说明。 图 3 为上行 eNodeB侧基于 CRC的 SIC算法流程示意图,如图所示,上行算法流程可以 归结为以下几个步骤:
1、 对接收信号进行 CRC检测, 判断 Error flag (错误标志)信息。 当所有用户的数据流 的判断信息同对或是同错的时候不做处理, 结束流程; 当存在若千数据流检测正确, 且存在 数据流检测错误的情况出现时, 进入 2;
2、 对判断为正确的用户的解调信息进行重构, 包括信道编码、 加扰、 调制、 DFT变换到 频域的过程;
3、 千扰消除过程, 即将重构的信号从接收信号中减掉;
4、 对去掉千扰后的用户的接收信号进行检测、 IDFT变换、 解调、 解扰;
5、 对数据流信号进行译码过程。
二、 在 UE侧从接收信号中减掉重构后的数据流信号后, 还可以进一步包括:
对去掉千扰后的接收的数据流信号进行检测、 解调、 解扰, 并对数据流信号进行译码过 程。
图 4为下行 UE侧基于 CRC的 SIC算法基本原理示意框图, 如图所示, 下行 UE侧的处 理可以为: 不同码字信号流经过信道后在接收端进行接收处理操作 (去 CP, DFT, MUD检 测, 译码等过程)后, 增加了 CRC检测, 符号重构, 千扰消除, 译码过程。
基于以上对原理的表述以及对原理框图的说明, 下面结合具体的算法流程进行说明。 图 5为下行 UE侧基于 CRC的 SIC算法流程图示意图, 如图所示, 下行算法流程可以归 结为以下几个步骤:
1、 对接收信号进行 CRC检测, 判断 Error flag (错误标志位)信息。 当所有码字的判断 信息同对或是同错的时候不做处理, 结束流程; 当存在若千码字检测正确, 且存在码字检测
错误的情况出现时, 进入 2;
2、 对判断为正确的码字的解调信息进行重构, 包括信道编码、 加扰、 调制、 层映射等过 程;
3、 千扰消除过程, 将重构的信号从接收信号中减掉;
4、 对去掉千扰后的接收信号进行检测、 解调、 解扰;
5、 去掉千扰后的信号的译码过程。
基于同一发明构思, 本发明实施例中还提供了一种千扰消除处理设备, 由于该设备解决 问题的原理与一种千扰消除处理方法相似, 因此该设备的实施可以参见方法的实施, 重复之 处不再赘述。
图 6为千扰消除处理设备结构示意图, 如图所示, 设备中可以包括:
CRC校验模块 601 , 用于在占用相同时频资源进行多个数据流信号传输时, 确定数据流 信号的 CRC校验信息;
信号确定模块 602 , 用于根据 CRC校验信息确定检测性能好的数据流信号;
消除处理模块 603 , 用于将检测性能好的数据流信号进行重构, 并从接收信号中减掉重 构后的数据流信号。
实施中,信号确定模块还可以进一步用于在根据 CRC校验信息确定检测性能好的数据流 信号时, 存在若千数据流检测结果为检测正确, 且其它数据流检测结果为检测错误时, 确定 检测正确的数据流为检测性能好的数据流信号。
实施中, 信号确定模块还可以进一步用于在接收端通过接收处理操作后确定数据流信号 的 CRC校 -险信息。
实施中, 在设备位于 eNodeB时, 还可以进一步包括:
第一后处理模块, 用于在从接收的数据流信号中减掉重构后的数据流信号后, 对去掉千 扰后的数据流信号进行检测、 IDFT变换、 解调、 解扰, 并分别对数据流信号进行译码过程。
实施中, 在设备位于 UE侧时, 还可以进一步包括:
第二后处理模块, 用于从接收的数据流信号中减掉重构后的数据流信号后, 对去掉千扰 后的数据流信号进行检测、 解调、 解扰, 并对数据流信号进行译码过程。
为了描述的方便, 以上所述装置的各部分以功能分为各种模块或单元分别描述。 当然, 在实施本发明时可以把各模块或单元的功能在同一个或多个软件或硬件中实现。
由上述实施例可见, 本发明提供的技术方案构思在于, 利用了 CRC的校验信息, 引入反 馈, 重构正确的有用信号, 降低接收信号的千扰, 该可以引申到所有的多天线系统, 具有广 泛的应用场景。 方案中利用了校验信息, 具体实施中, 也可以不是 CRC的译码, 对于非 LTE 系统或者没有釆用 CRC编译码的系统可以釆用其它的利用译码信息的形式;
方案同时适用于上行和下行, 同样适用于上行 SDMA ( Spatial Divison Multiple Access,
空分多址接入)方案、 下行双流 BF ( Beam forming, 波束赋形) 以及其它利用多天线技术实 现空间资源重复利用的系统以及传输模式。
本发明实施例提供的技术方案, 计算复杂度低。 与 MUD相比, 复杂度增加 2-3倍; 但 是, 相对于理想的 ML算法以及 Turbo-SIC算法, 此算算法性能已经接近理想算法, 复杂度 易于实现。
利用了 CRC的校验信息, CRC译码是 LTE系统必须的一种操作, 本算法适当的利用了 译码信息, 对于非 LTE系统或者没有釆用 CRC编译码的系统可以釆用其它的利用译码信息 的形式。
可以应用在多种无线环境中, 只要是利用多天线技术实现共享频带资源的系统都可以利 用该算法思路。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的 形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机可用存储 介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程序产品的形 式。
本发明是参照根据本发明实施例的方法、设备(系统)、 和计算机程序产品的流程图和 / 或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流程和 / 或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机程序指令 到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个 机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程 图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工 作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装置的制 造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指 定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机或 其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他可编 程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个方框或多 个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选实施例 以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范
围。 这样, 倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则 本发明也意图包含这些改动和变型在内。
Claims
1、 一种千扰消除处理方法, 其特征在于, 包括如下步骤:
在占用相同时频资源进行多个数据流信号传输时, 确定数据流信号的循环冗余校验 CRC 校验信息;
根据 CRC校验信息确定检测性能好的数据流信号;
将检测性能好的数据流信号进行重构, 并从接收信号中减掉重构后的数据流信号。
2、 如权利要求 1所述的方法, 其特征在于, 根据 CRC校验信息确定检测性能好的数据 流信号包括:
存在若千数据流检测结果为检测正确, 且其他数据流检测结果为检测错误时, 确定检测 正确的数据流为检测性能好的数据流信号。
3、 如权利要求 1所述的方法, 其特征在于, 确定数据流信号的 CRC校验信息是在接收 端通过接收处理操作后进行确定的。
4、 如权利要求 1或 2或 3所述的方法, 其特征在于, 在演进基站 eNodeB侧从接收的数 据流信号中减掉重构后的数据流信号后, 进一步包括:
对去掉千扰后的接收的数据流信号进行检测、 离散傅里叶逆变换 IDFT 变换、 解调、 解 扰, 并分别对数据流信号进行译码过程。
5、 如权利要求 1或 2或 3所述的方法, 其特征在于, 在用户设备 UE侧从接收的数据流 信号中减掉重构后的数据流信号后, 进一步包括:
对去掉千扰后的接收的数据流信号进行检测、 解调、 解扰, 并对数据流信号进行译码过 程。
6、 一种千扰消除处理设备, 其特征在于, 包括:
CRC校验模块, 用于在占用相同时频资源进行多个数据流信号传输时, 确定数据流信号 的 CRC校验信息;
信号确定模块, 用于根据 CRC校验信息确定检测性能好的数据流信号;
消除处理模块, 用于将检测性能好的数据流信号进行重构, 并从接收信号中减掉重构后 的数据流信号。
7、 如权利要求 6所述的设备, 其特征在于, 信号确定模块进一步用于在根据 CRC校验 信息确定检测性能好的数据流信号时, 存在若千数据流检测结果为检测正确, 且其他数据流 检测结果为检测错误时, 确定检测正确的数据流为检测性能好的数据流信号。
8、 如权利要求 6所述的设备, 其特征在于, 信号确定模块进一步用于在接收端通过接收 处理操作后确定数据流信号的 CRC校验信息。
9、 如权利要求 6或 7或 8所述的设备, 其特征在于, 在设备位于 eNodeB时, 进一步包 括: 第一后处理模块, 用于在从接收的数据流信号中减掉重构后的数据流信号后, 对去掉千 扰后的接收的数据流信号进行检测、 IDFT变换、 解调、 解扰, 并分别对数据流信号进行译码 过程。
10、 如权利要求 6或 7或 8所述的设备, 其特征在于, 在设备位于 UE侧时, 进一步包 括:
第二后处理模块, 用于从接收的数据流信号中减掉重构后的数据流信号后, 对去掉千扰 后的接收的数据流信号进行检测、 解调、 解扰, 并对数据流信号进行译码过程。
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