In this paper, we analyze the average symbol error rate (ASER) of single-input multiple-output (SIMO) networks for rectangular quadrature amplitude modulation (RQAM) and cross-QAM (XQAM) subject to Rayleigh fading. Then, we investigate the performance of RQAM for a SIMO system under κ-μ fading conditions. And also, we consider a multiple-input multiple-output with single transmit antenna selection and maximal ratio combining over Rayleigh fading environments. To analyze the key parameters on the network performances, we propose the analytical expressions of ASER for the considered networks. Assuming flat fading, the obtained exact and approximate expressions for ASER based on the probability density function approach. Furthermore, we present asymptotic expressions of RQAM and XQAM schemes for a SIMO system over Rayleigh fading at the high signal to noise ratio to evaluate the network performance in terms of diversity gain. Finally, simulations are ensured to confirm the correctness of our frameworks in this study.

在本文中，我们分析了受瑞利衰落影响的矩形正交幅度调制（RQAM）和交叉QAM（XQAM）的单输入多输出（SIMO）网络的平均符号错误率（ASER）。然后，我们研究了κ - μ下SIMO系统的RQAM性能。衰落条件。而且，我们考虑在瑞利衰落环境下具有单发射天线选择和最大比率组合的多输入多输出。为了分析网络性能的关键参数，我们针对所考虑的网络提出了ASER的解析表达式。假设平坦衰落，则基于概率密度函数方法获得的ASER精确表达式和近似表达式。此外，我们提出了在高信噪比下瑞利衰落下SIMO系统的RQAM和XQAM方案的渐近表达式，以根据分集增益来评估网络性能。最后，确保进行仿真以确认本研究中我们框架的正确性。