基于波束相关性的多波束卫星终端分组算法

Terminal Grouping Algorithm for Multi-beam Satellites Based on Beam Correlation

针对多波束卫星通信系统的特点,对波束间干扰的系统模型和预编码算法进行了简要介绍,为了降低使用预编码算法时用户终端的信道相关性,提出了一种基于相邻波束间增益相关性的终端分组算法。该算法利用信道矩阵中每个终端受到所在点波束和其相邻点波束间信道增益的相关性,对终端进行最优分组;最后在单个多波束卫星通信场景下对误码率和信道容量进行仿真测试,仿真结果表明该算法与其他分组算法相比具有2.5 dB的信噪比门限增益和更高的信道容量。

The system model of inter-beam interference and the precoding algorithm are briefly introduced based on the characteristics of multi-beam satellite communication system.In order to reduce channel correlation of the user terminal when using precoding algorithm,a terminal grouping algorithm based on gain correlation between adjacent beams is proposed.The algorithm uses the correlation of the channel gain between the point beam to which each terminal receives signal and its adjacent point beams to group the terminals optimally.Finally,the bit error rate and channel capacity are simulated in a single multi-beam satellite communication scenario.Simulation results show that the proposed algorithm has a 2.5 dB SNR threshold gain and higher channel capacity compared with other packet algorithms.