Performance of MIMO single-carrier frequency domain zero-forcing equalizer

Performance of MIMO single-carrier frequency domain zero-forcing equalizer

Single-carrier frequency domain equalization (SC-FDE) has many advantages, but in the MIMO frequency selective channel its performance has not been fully characterized and several important open questions remain. This paper analyzes the diversity of zero-forcing MIMO SC-FDE. It is shown that the diversity of the ZF receiver over this channel is the same as that of the ZF receiver in the frequency-flat channel. To improve the performance, a lattice-reduction (LR) aided ZF equalization is proposed and analyzed. It is shown that the full spatial and temporal diversity is achieved by he LR-aided ZF receiver for the uncoded transmission. This is the first analytical proof for the LR-aided equalization for MIMO frequency selective channel.

单载波频域均衡（SC-FDE）具有许多优势，但是在MIMO频率选择性渠道中，其性能尚未完全表征，并且仍然存在一些重要的开放问题。本文分析了零强度的MIMO SC-FDE的多样性。结果表明，该通道对ZF接收器的多样性与频率 - 静电通道中ZF接收器的多样性相同。为了提高性能，提出和分析了晶格还原（LR）辅助ZF均衡。结果表明，在未编码的传输方面，他的ZF接收器可以实现完整的空间和时间多样性。这是MIMO频率选择通道的LR辅助均衡的第一个分析证明。