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分布式MIMO的Turbo检测算法
Turbo Detection Scheme for Distributed MIMO
【摘要】 当信道码为卷积码时,针对V-BLAST类空时码的分布式MIMO,该文提出了两种迭代检测算法:最大似然迭代接收机及一种低复杂度的迭代检测接收机。最大似然迭代检测接收机的复杂度为()O2MTSlogM,低复杂度的迭代检测接收机的复杂度为()222OMTMRSM。在准静态、单径瑞利衰落信道中,对低复杂度的迭代检测接收机的误码率性能进行了计算机仿真验证,与非迭代的迫零检测相比,低复杂度的迭代检测接收机节约比特信噪比约7.5dB;在相同的误码率下,迭代6次与迭代1次相比,可节约3dB的比特信噪比;随着迭代次数的增加,迭代效果越来越小。
【Abstract】 In this paper, a iterative receiver is introduced for convolutionally coded distributed MIMO with V-BLAST architecture. A maximum-likelihood (ML) iterative detector and a low-complexity Turbo detection scheme are proposed. The computational complexity is ( )O 2 M TS logM and ( )2 2 2O M T M RS M respectively. Simulation results in quasi-stationary, single-path Rayleigh fading channel demonstrate that the proposed low-complexity iterative detection algorithm offers significant performance improvement about 7.5dB at Eb N 0 than the non-iterative zero-forcing detection. At same BER (Bit Error Rate), 1 iteration’s Eb N 0 is 3dB above 6 iterations’. Performance improvement gradually declines as the number of iteration increases.
【Key words】 Distributed Multiple Input Multiple Output (MIMO); Turbo (iterative) detection; Soft-input soft-output; Parallel soft interference cancellation; Instantaneous minimum mean-square error (MMSE) filtering; Channel propagation delay;
- 【文献出处】 电子与信息学报 ,Journal of Electronics & Information Technology , 编辑部邮箱 ,2006年12期
- 【分类号】TN911.2
- 【被引频次】3
- 【下载频次】264