衬垫
诺玛
不完美的
计算机科学
认知无线电
频道(广播)
蒙特卡罗方法
算法
拓扑(电路)
理论计算机科学
计算机网络
数学
电信
组合数学
信噪比(成像)
统计
无线
电信线路
哲学
语言学
作者
Sultangali Arzykulov,Theodoros A. Tsiftsis,Galymzhan Nauryzbayev,Mohamed Abdallah
标识
DOI:10.1109/lcomm.2018.2878730
摘要
In this letter, a decode-and-forward cooperative underlay cognitive radio (CR) non-orthogonal multiple access (NOMA) network is studied. Exact closed-form expressions for the outage probability (OP) of two NOMA secondary destination users (U 1 and U 2 ) are derived in the case of imperfect channel state information. Then, we find optimal power allocation factors for different distances of U 1 to satisfy the OP fairness for both users. Moreover, the proposed system model shows the superiority of the CR-NOMA compared with cooperative orthogonal multiple access. The derived analytical expressions are corroborated through Monte Carlo simulations.
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