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O(2^MTSlogM ),低复杂度的迭代检测接收机的复杂度为O( MT^2MR^2S^2M)。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。
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^MTSlogM) and O(MT^2MR^2S^2M) 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.SdB at Eb/N0 than the non-iterative zero-forcing detection. At same BEn (Bit Error Rate), 1 iteration's Eb/N0 is 3dB above 6 iterations'. Performance improvement gradually declines as the number of iteration increases.