Method and apparatus for eliminating serial interference of multi-aerial system

A serial interference cancellation and multi-antenna system technology, applied in diversity/multi-antenna systems, transmission systems, baseband system components, etc., can solve the problem of inability to regenerate interference signals and inability to use MCW-MIMO serial interference cancellation receivers, etc. question

Inactive Publication Date: 2008-10-01
ZTE CORP
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  • Application Information

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Problems solved by technology

[0004] In the SCW-MIMO system, since the data information of each antenna at the transmitting end belongs to one coding block, at the receiving end, the interference signal of ...

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  • Method and apparatus for eliminating serial interference of multi-aerial system
  • Method and apparatus for eliminating serial interference of multi-aerial system
  • Method and apparatus for eliminating serial interference of multi-aerial system

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Embodiment Construction

[0037] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] First, let me introduce the specific operation of the linear receiver of SCW-MIMO in detail:

[0039] Suppose one has N t root hair antenna and N r SCW-MIMO system with root receiving antenna. The source bitstream is encoded by N tThe antennas are multiplexed, and then the coded data streams are modulated and transmitted. The system model can be expressed as:

[0040] Y = H · X + n = Σ i H i · X i + n - - - ( 1 )

[0041] X = [ X 1 ...

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Abstract

A method for removing serial interference of a multi-antenna system and a device for realizing the method are disclosed, the system comprises N sending antennas, the method comprises the following steps of: (a) judging quality of signals of each path of data stream in receiving signals; (b) performing minimum mean square error MMSE detection with a path of data flow having the optimal quality of signals in order to detect a path of data stream; (C) soft-demodulating the detection result to acquire soft-bit information, judging whether the N paths of data streams are detected, if so, ending; if not, performing the next step; (d) according to the soft-bit information acquired in the step (c), obtaining possibility of the detection result mapping on each constellation point of modulation constellation map, and multiplying the possibility by the sum of values of the corresponding constellation points to attain the soft-symbol information, making use of the soft-symbol information to intervene for rebirth, canceling, judging the quality of signals of each path of data stream in the cancelled signals, and entering into the step (B).

Description

technical field [0001] The invention relates to serial interference elimination technology, in particular to a method and device for realizing serial interference elimination in a single / multiple code word MIMO system. Background technique [0002] In the long-term evolution (LTE) downlink system, for the multiple-codeword multiple-input multiple-output (MCW-MIMO) system (such as figure 1 shown), it is generally recommended to use an interference cancellation receiver to improve the detection performance. Such as figure 2 As shown, the signal of the data stream with better channel conditions is first detected at the receiving end, and then demodulated and decoded to obtain the information bits of the stream. Perform operations such as re-encoding, re-modulation, and channeling to restore the stream, and eliminate it from the received signal, and perform serial interference elimination iteratively to improve the link performance of the system. [0003] For single-codeword...

Claims

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Application Information

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IPC IPC(8): H04L25/06H04B1/707H04B1/10H04B7/02
Inventor 肖琨韩璐赵慧王文博
Owner ZTE CORP
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