多用户MIMO系统上行检测算法

Uplink detection algorithms in multiuser MIMO systems

针对多用户MIMO上行传输系统提出了两种新型的多用户检测算法.利用块对角化技术将多用户MIMO系统并行或者串行地分解为多个单用户MIMO系统,从而使得适用于单用户MIMO系统的算法可以直接应用,极大地降低了系统的复杂度.仿真结果表明,该算法能够达到与相应单用户MIMO系统相同的性能,而与传统的迫零算法相比,性能有很大的提高.此外,理论分析与实验结果表明,串行多用户检测算法性能优于并行多用户检测算法.

We propose two novel uplink multiuser detection （MUD） algorithms for Multi-User Multiple Input Multiple Output （MU-MIMO） systems. Based on block diagonalization （BD） technique the proposed parallel and successive MUD algorithms can decompose the MU-MIMO system into parallel single user MIMO （SU-MIMO） systems, which enables the SU-MIMO based algorithms to be directly applied and significantly reduces complexity. Simulation results show that the proposed algorithms are capable of achieving the same performance as the corresponding SU-MIMO system and have a substantial performance gain against the traditional zero-forcing （ZF） based algorithm. Furthermore, theoretical analysis and simulation results demonstrate that the successive BD algorithm significantly outperforms the parallel one.