空间散射调制系统的功率分配优化

Power Allocation Optimization for Spatial Scattering Modulation System

为了在补偿自由空间传输损耗的同时提高毫米波系统的传输效率,针对工作于毫米波频段并采用阵列波束成形技术的空间散射调制系统,研究了系统互信息的特性,并推导了其理论表达式。在此基础上,提出了一种新的功率分配方案,以提高系统的互信息性能。数值仿真结果表明,推导出的互信息理论近似表达式与仿真值吻合度较高,相比于传统的平均功率分配方案,新功率分配方案在多种仿真条件下显著提高了系统的互信息。

To improve the transmission efficiency of millimeter-wave system while compensating free-space propagation loss,for the spatial scattering modulation system that works in the millimeter-wave frequency range and utilizes array beamforming technique,this paper investigates the properties of the system mutual information and derives its theoretical expression.On this basis,the paper proposes a novel power allocation scheme to improve the mutual information performance of the system.Numerical simulation results demonstrate that the derived theoretical approximate expressions of the mutual information closely aligns with the simulation values,and the new power allocation scheme significantly enhances system mutual information under a variety of simulation conditions compared to the conventional average power allocation scheme.