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Method for counteracting minimum mean-square error soft interference, signal detector and receiver

A minimum mean square error, signal detector technology, applied in the field of communication, can solve the problems of system performance degradation, increase the number of iterative detections, increase system complexity, etc., to maintain performance, reduce power consumption and delay, and reduce complexity. Effect

Active Publication Date: 2007-06-06
HUAWEI TECH CO LTD +1
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Problems solved by technology

[0057] Although this method can avoid complex matrix inversion operations, compared with the prior art 1, the system performance drops greatly
In order to achieve the same performance, it is necessary to increase the number of iterative detections, thereby increasing the number of operations of the channel decoder and increasing the complexity of the system

Method used

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  • Method for counteracting minimum mean-square error soft interference, signal detector and receiver
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  • Method for counteracting minimum mean-square error soft interference, signal detector and receiver

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Embodiment Construction

[0080] The embodiment of the present invention uses the matrix inversion lemma to calculate the MMSE filter coefficient vector W i to rewrite. Among them, the matrix inversion lemma is shown in the formula [16]:

[0081] ( A + buv H ) - 1 = A - 1 - b 1 + bv H A - 1 u A - 1 uv H A - 1 ………… Formula [16]

[0082] Substituting the variables in E...

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Abstract

A soft interference counterbalancing method of minimum mean square error includes utilizes revised function to calculate and to obtain corresponding MMSE filter coefficient vector when non-reliable character prior verified information amount being not over one in characters being emitted simultaneously is confirmed, calculating external bit log likelihood radio of coding bit outputted by signal detector, sending said ratio into signal detector for carrying out next time of iteration after said ratio is processed by deinterlacer and channel decoder.

Description

technical field [0001] The invention relates to the communication field, in particular to the minimum mean square error soft interference cancellation technology. Background technique [0002] The multiple-input multiple-output (MIMO) system adopts multiple transmitting antennas and receiving antennas at the transmitting end and the receiving end respectively, so that the channel capacity of the system can be improved without increasing the bandwidth, and the diversity gain of transmitting and receiving can be obtained at the same time, and the transmission can be improved. Therefore, it has become the main development direction of the next generation wireless communication. [0003] In order to take full advantage of the huge potential of the MIMO system, iterative (Turbo) reception detection technology must be adopted. In the iterative reception detection process, the signal detector can realize soft-in / soft-out (SISO), that is, simultaneously accept the log-likelihood ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03
Inventor 王军李少谦王吉滨李杰
Owner HUAWEI TECH CO LTD
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