In this paper, we address the problem of detector design in the frequency-selective fading channels for unique-wordbased single-carrier spatial modulation (UWSC-SM) systems. We propose to precede the conventional M-algorithm with anappropriately designed frequency-domain prefilter to condition the equivalent channel so that the number of the survivor paths needed for a satisfactory performance can be significantly reduced. By exploiting the block circulant channel induced by the UWSC-SM block format, the prefilter can be computed, and carried out efficiently using the fast Fourier transforms. Simulation results demonstrate that, compared to the conventional M-algorithm, the proposed algorithm achieves essentially the same error-rate performance with a considerably lower overall complexity in systems where the number of receive antennas is no smaller than that of transmit antennas.

中文翻译：

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频率选择性衰落信道中单载波空间调制信号的检测算法


在本文中，我们解决了基于唯一字的单载波空间调制（UWSC-SM）系统的频率选择性衰落通道中的检测器设计问题。我们建议在传统的 M 算法之前使用适当设计的频域预滤波器来调节等效信道，以便可以显着减少获得令人满意的性能所需的幸存路径的数量。通过利用由 UWSC-SM 块格式引起的块循环信道，可以使用快速傅里叶变换来计算和高效地执行预滤波器。仿真结果表明，与传统的M算法相比，在接收天线数量不小于发射天线数量的系统中，该算法实现了基本相同的误码率性能，并且整体复杂度显着降低。