MIMO位交错编码调制的低复杂度接收机设计

I. Collings, M. Butler, Matthew R. McKay
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引用次数: 70

摘要

本文研究了位交织编码调制(BICM)的多输入多输出(MIMO)系统。考虑了两种接收机结构,一种基于零强迫,另一种基于最小均方误差(MMSE)。在每种情况下,对PSK和QAM进行了近似对数似然(ALL)解码方法的检查。与最大似然(ML)接收器相比,所得到的接收器的复杂性显着降低。我们扩展了先前的结果,该结果表明,对于ZF-ALL接收器,与ML相比,当接收天线数量或调制顺序增加时,性能差距减小。我们证明了带有BICM的ALL度量可以抵消来自线性接收器的任何噪声增强。我们还证明了线性BICM方案优于相应的BLAST方法。
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Low complexity receiver design for MIMO bit-interleaved coded modulation
This paper considers multiple-input multiple-output (MIMO) systems with bit-interleaved coded modulation (BICM). Two receiver structures are considered, one based on zero-forcing, the other on minimum mean square error (MMSE). An approximate log-likelihood (ALL) decoding approach is examined in each case, for PSK and QAM. The resulting receivers are significantly lower complexity compared to the maximum likelihood (ML) receiver. We expand on previous results which showed that for the ZF-ALL receiver the performance gap, compared to ML, reduces when either the number of receive antennas or the modulation order is increased. We demonstrate that the ALL metric with BICM counteracts any noise enhancement from the linear receivers. We also show that the linear BICM schemes outperform the corresponding BLAST approaches.
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