非理想顺序干扰消除和信道状态信息下SWIPT-NOMA-CR网络中断性能

doi:10.11959/j.issn.2096-3750.2023.00314

摘要/Abstract

摘要：

针对基于无线携能通信（SWIPT, simultaneous wireless information and power transfer）和非正交多址接入（NOMA, non-orthogonal multiple access）的认知中继（CR, cognitive relay）（SWIPT-NOMA-CR）网络，考虑非理想顺序干扰消除（SIC, successive interference cancellation）和信道状态信息（CSI, channel state information）实际情况，研究系统在采用理想、时间开关（TS, time switching）和功率分割（PS, power splitting）3种中继传输方案时次用户的中断性能。推导出次用户中断概率的解析表达式，并通过蒙特卡洛仿真验证理论推导的正确性。实验结果表明，非理想SIC和CSI会导致次用户的中断性能下降，相对于非理想CSI，非理想SIC给系统中断性能带来的损失更大。此外，用户采用PS中继传输方案的中断概率比采用TS方案低，当改变非理想SIC和CSI因子时，采用PS方案用户的中断概率差值比TS方案小，说明PS中继传输方案的可靠性优于TS方案。

关键词: 无线携能通信, 非正交多址接入, 认知中继网络, 中断性能, 非理想SIC, 非理想CSI

Abstract:

For the cognitive relay network based on simultaneous wireless information and power transfer (SWIPT) and non-orthogonal multiple access (NOMA), which is termed as SWIPT-NOMA-CR network, considering the practical situation of imperfect successive interference cancellation (SIC) and channel state information (CSI), the outage performance of secondary users was studied by using three relay transmission schemes including ideal, time switching (TS) and power splitting (PS).The analytical expressions of outage probability were derived for the secondary users, and the theoretical derivations were validated by Monte Carlo simulations.The results show that the outage performance of secondary users is impaired due to the imperfect SIC and CSI.Compared with the imperfect CSI, the imperfect SIC causes more severe loss to the outage performance of the system.Moreover, the outage probability of PS relay transmission scheme is lower than that of TS scheme.When the imperfect SIC and CSI conditions are changed, the outage probability gap with PS scheme is less than that with TS scheme, which indicates that the reliability of PS relay transmission scheme is superior to that of TS scheme.

Key words: simultaneous wireless information and power transfer, non-orthogonal multiple access, cognitive relay network, outage performance, imperfect successive interference cancellation, imperfect channel state information

中图分类号:

TN92

马柱华, 罗丽平. 非理想顺序干扰消除和信道状态信息下SWIPT-NOMA-CR网络中断性能[J]. 物联网学报, 2023, 7(1): 129-139.

Zhuhua MA, Liping LUO. Outage performance of SWIPT-NOMA-CR network with imperfect SIC and CSI[J]. Chinese Journal on Internet of Things, 2023, 7(1): 129-139.

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SNR/dB	11	13	15	17	19	21	23	25
理想方案	0.121 06	0.128 01	0.130 76	0.130 52	0.130 6	0.130 39	0.128 76	0.134 47
PS方案	0.073 05	0.084 43	0.089 6	0.086 06	0.082 93	0.087 09	0.084 24	0.086 4
TS方案	0.106 37	0.124 77	0.136 7	0.141 57	0.138 46	0.143 02	0.140 83	0.143 27

SNR/dB	11	13	15	17	19	21	23	25
理想方案	0.380 97	0.401 53	0.402 73	0.401 68	0.403 83	0.401 6	0.401 55	0.401 64
PS方案	0.206 75	0.244 44	0.258 98	0.261 95	0.257 96	0.261 35	0.259 1	0.261 01
TS方案	0.198 52	0.259 16	0.289 51	0.298 82	0.301 31	0.302 32	0.302 88	0.303 65