分布式MIMO的Turbo检测算法

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。

Turbo Detection Scheme for Distributed MIMO

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_TSlogM) and O(M²_TM²_RS²M) 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 than the non-iterative zero-forcing detection. At same BER (Bit Error Rate), 1 iteration’s E_b/N₀ is 3dB above 6 iterations’. Performance improvement gradually declines as the number of iteration increases.