Under multipath fading channels, maximum likelihood detection of multiple-input multiple-output filter-bank multicarrier-quadrature amplitude modulation (MIMO FBMC-QAM) system suffers from the performance degradation due to the residual interference. To solve this problem, we propose a precoding-aided MIMO FBMC-QAM system for the per-tone maximum likelihood detection. By adopting the precoder as the null space of effective channels, the proposed system can eliminate the residual interference. Simulation results show that the proposed system can overcome the error flooring phenomenon without interference cancellation.

中文翻译：

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用于最大似然检测的预编码辅助 MIMO FBMC-QAM 系统

在多径衰落信道下，多输入多输出滤波器组多载波正交幅度调制（MIMO FBMC-QAM）系统的最大似然检测会因残余干扰而导致性能下降。为了解决这个问题，我们提出了一种用于每音调最大似然检测的预编码辅助 MIMO FBMC-QAM 系统。通过采用预编码器作为有效信道的零空间，该系统可以消除残余干扰。仿真结果表明，所提出的系统可以在不消除干扰的情况下克服错误地板现象。