This study investigates the performances of cooperative pattern division multiple access (PDMA) technology with a half-duplex amplify-and-forward (AF) relaying over Rayleigh fading channels. To characterise the performances of the AF-PDMA system, the closed-form expressions of the exact outage probabilities, system throughput and diversity order are derived, respectively. The particle swarm optimisation algorithm based on penalty function is used to obtain the optimum power allocation coefficients by maximising the system throughput. By setting different values on the target data rate for users to analyse the AF-PDMA system throughput performance, simulation results demonstrate the performance enhancement of the considered AF-PDMA compared with orthogonal multiple access with AF relaying and PDMA with decode-and-forward relaying.

中文翻译：

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瑞利衰落信道上具有AF中继的协作PDMA的性能分析

这项研究调查了合作模式划分多址（PDMA）技术与瑞利衰落信道上的半双工放大转发（AF）中继的性能。为了表征AF-PDMA系统的性能，分别推导了精确中断概率，系统吞吐量和分集顺序的闭式表达式。基于惩罚函数的粒子群优化算法被用于通过最大化系统吞吐量来获得最优的功率分配系数。通过在目标数据速率上设置不同的值以供用户分析AF-PDMA系统的吞吐性能，仿真结果表明，与采用AF中继的正交多址访问和采用解码转发中继的PDMA相比，考虑的AF-PDMA的性能得到了提高。