DS-CDMA卫星移动通信系统容量分析

Capacity Analysis of DS-CDMA Satellite Mobile Communication System

本文针对短帧的突发业务情形,采用里所码(Reed-solomoncodes,RS)加卷积码的编码方式,对业务容量进行了详细的分析,在高斯信道模型下,推导出不同功率条件下的容量表达式,并在不同的干扰功率下对理论结果进行仿真,将仿真结果和理论分析进行对照,证明了理论分析的正确性。理论分析结果可以进行用户容量和信噪比的一定范围内的定量估计,得到系统能够容纳的用户数量,从而做到通信资源的有效分配和供给,达到提高通信效率的目的。

This paper bases on gaussian channel model and short frames of packet service,using the coding method of RS and convolutional codes,to conduct a detailed analysis of traffic capacity,obtain the capacity of expression deduced under different power conditions.At the end of the paper it's the simulation of theoretical results,compare the simulation results with the theoretical results,it proves the correctness of the theoretical results.The theoretical analysis results can be quantitatively estimate capacity within a certain range to obtain the number of users the system can accommodate,and thereby efficient allocation of communication resources to improve the supply of communication efficiency.