Cooperative non-orthogonal multiple access (CNOMA) has recently been adapted with energy harvesting (EH) to increase energy efficiency and extend the lifetime of energy-constrained wireless networks. This paper proposes a hybrid EH protocol-assisted CNOMA, which is a combination of the two main existing EH protocols (power splitting (PS) and time switching (TS)). The end-to-end bit error rate (BER) expressions of users in the proposed scheme are obtained over Nakagami-$m$ fading channels. The proposed hybrid EH (HEH) protocol is compared with the benchmark schemes (i.e., existing EH protocols and no EH). Based on the extensive simulations, we reveal that the analytical results match perfectly with simulations which proves the correctness of the derivations. Numerical results also show that the HEH-CNOMA outperforms the benchmarks significantly. In addition, we discuss the optimum value of EH factors to minimize the error probability in HEH-CNOMA and show that an optimum value can be obtained according to channel parameters.
翻译:最近,随着能源收获(EH)的提高能源效率和延长能源限制无线网络的寿命,合作性非横向多重接入(CNOMA)最近与能源收获(EH)进行了调整,以便提高能源效率,延长受能源限制的无线网络的寿命。本文件建议采用混合的 EH 协议协助的CNOMA,这是现有两个主要的EH协议(分电和时间转换(TS))的组合。拟议办法中的用户端到端位误差率(BER)的表达方式超过了纳卡加美-百万美元的淡化渠道。拟议的混合 EH(HEH)协议与基准计划(即现有的EH协议和无EH)进行了比较。根据广泛的模拟,我们发现分析结果与模拟完全吻合,这些模拟证明衍生物的正确性。数字结果还显示,HEH-CNOMA大大超过基准。此外,我们讨论了EH-CNOMA要素的最佳价值,以尽量减少HEH-CNOMA的误率概率,并表明可以根据频道参数获得最佳价值。