This paper proposes a high-throughput short reference differential chaos shift keying cooperative communication system with the aid of code index modulation, referred to as CIM-SR-DCSK-CC system. In the proposed CIM-SR-DCSK-CC system, the source transmits information bits to both the relay and destination in the first time slot, while the relay not only forwards the source information bits but also sends new information bits to the destination in the second time slot. To be specific, the relay employs an $N$-order Walsh code to carry additional ${{\log }_{2}}N$ information bits, which are superimposed onto the SR-DCSK signal carrying the decoded source information bits. Subsequently, the superimposed signal carrying both the source and relay information bits is transmitted to the destination. Moreover, the theoretical bit error rate (BER) expressions of the proposed CIM-SR-DCSK-CC system are derived over additive white Gaussian noise (AWGN) and multipath Rayleigh fading channels. Compared with the conventional DCSK-CC system and SR-DCSK-CC system, the proposed CIM-SR-DCSK-CC system can significantly improve the throughput without deteriorating any BER performance. As a consequence, the proposed system is very promising for the applications of the 6G-enabled low-power and high-rate communication.
翻译:本文建议采用高通量短暂参考差异混混,在代码指数调制(称为CIM-SR-DCSK-CC-CC)辅助下,高通量短暂参考差异变换关键合作通信系统,称为CIM-SR-DCSK-CC-CC系统。在拟议的CIM-SR-DCSK-CC系统中,源头和端口均在第一个时段传输信息比特,而中继器不仅转发源信息比特,而且还在第二个时段向端口发送新的信息比特。具体来说,中继器使用美元级沃尔什编码,以携带额外的$çlog ⁇ 2 ⁇ N$的信息比特,这些比重被叠加到带有已解码源信息比特的SR-DCK信号。随后,将源头和中继信息比重的信号传送到端口端口端,此外,拟议的CIM-SR-CS-CSCS-CSCS-CSDS-CS-SDSA建议的高性能系统和S-S-SDR-S-C-CS-CS-CSDRS-CS-CS-CS-CS-S-CS-CS-S-CS-CS-CSBS-CS-S-S-CS-S-S-SBS-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-SBS-S-S-CS-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-C-C-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-C-S-S-S-S-A