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首页> 外文期刊>IEEE Transactions on Communications >Spatial Modulation Aided Zero-Padded Single Carrier Transmission for Dispersive Channels
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Spatial Modulation Aided Zero-Padded Single Carrier Transmission for Dispersive Channels

机译：色散信道的空间调制辅助零填充单载波传输

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In this paper, we consider spatial modulation (SM) operating in a frequency-selective single-carrier (SC) communication scenario and propose zero-padding instead of the cyclic-prefix considered in the existing literature. We show that the zero-padded single-carrier (ZP-SC) SM system offers full multipath diversity under maximum-likelihood (ML) detection, unlike the cyclic-prefix based SM system. Furthermore, we show that the order of ML detection complexity in our proposed ZP-SC SM system is independent of the frame length and depends only on the number of multipath links between the transmitter and the receiver. Thus, we show that the zero-padding applied in the SC SM system has two advantages over the cyclic prefix: 1) achieves full multipath diversity, and 2) imposes a relatively low ML detection complexity. Furthermore, we extend the partial interference cancellation receiver (PIC-R) proposed by Guo and Xia for the detection of space-time block codes (STBCs) in order to convert the ZP-SC system into a set of narrowband subsystems experiencing flat-fading. We show that full rank STBC transmissions over these subsystems achieves full transmit, receive as well as multipath diversity for the PIC-R. Furthermore, we show that the ZP-SC SM system achieves receive and multipath diversity for the PIC-R at a detection complexity order which is the same as that of the SM system in flat-fading scenario. Our simulation results demonstrate that the symbol error ratio performance of the proposed linear receiver for the ZP-SC SM system is significantly better than that of the SM in cyclic prefix based orthogonal frequency division multiplexing as well as of the SM in the cyclic-prefixed and zero-padded single carrier systems relying on zero-forcing/minimum mean-squared error equalizer based receivers.
机译：在本文中，我们考虑在频率选择单载波（SC）通信方案中运行的空间调制（SM），并提出零填充而不是现有文献中考虑的循环前缀。我们表明，与基于循环前缀的SM系统不同，零填充单载波（ZP-SC）SM系统在最大似然（ML）检测下提供了完整的多径分集。此外，我们表明，在我们提出的ZP-SC SM系统中，ML检测复杂度的顺序与帧长度无关，并且仅取决于发送器和接收器之间的多径链接数。因此，我们证明了SC SM系统中应用的零填充相对于循环前缀具有两个优点：1）实现完全的多径分集，2）施加相对较低的ML检测复杂度。此外，我们扩展了Guo和Xia提出的用于检测时空分组码（STBC）的部分干扰消除接收机（PIC-R），以便将ZP-SC系统转换为一组经历平坦衰落的窄带子系统。我们表明，通过这些子系统进行的满级STBC传输可实现PIC-R的完整发送，接收以及多径分集。此外，我们表明ZP-SC SM系统以与平面衰落场景中SM系统相同的检测复杂度顺序实现了PIC-R的接收和多径分集。我们的仿真结果表明，针对ZP-SC SM系统，所提出的线性接收器的符号错误率性能明显优于基于循环前缀的正交频分复用中的SM以及基于循环前缀和正交前缀的SM中的SM。零填充单载波系统依赖于基于零强制/最小均方误差均衡器的接收机。

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