基于List Viterbi译码的硬/软混合干扰消除

Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 2005-12-01 DOI:10.1109/ACSSC.2005.1599872

Wanlun Zhao, Renqiu Wang, G. Giannakis

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引用次数: 0

摘要

研究了一种具有CRC错误检测功能的卷积编码多输入多输出系统。对于每个卷积码，采用list Viterbi算法(LVA)找到一个有希望的码字列表。CRC码不仅用于从这个列表中选择一个正确的;同时控制硬决策反馈和软干扰消除之间的切换。此外，使用LVA返回的相同码字列表，以较低的复杂度生成位级软信息。仿真结果表明，与现有的硬决策方法相比，这种硬/软混合干扰抵消方案在相当的复杂度下获得了更高的误差性能

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Hybrid Hard/Soft Interference Cancellation Based on List Viterbi Decoding

A convolutionally coded multiple-input multiple-output system equipped with CRC error detection is considered. For each convolutional code, the list Viterbi algorithm (LVA) is employed to find a list of promising codewords. CRC code is used not only to select a correct one from this list; but also to control the switching between hard-decision feedback and soft interference cancellation. Further, bit-level soft information is generated with low complexity, albeit approximately, using the same codeword list returned by LVA. Simulations confirm that this hybrid hard/soft interference cancellation scheme achieves enhanced error performance relative to existing hard-decision approaches at a comparable complexity

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Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.

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