正交码扩频多址（OC－SSMA）系统的容量

The Capacity of Orthogonal Code Spread-Spectrum Multiple Access System

本文对正交码扩频多址系统在相干接收和非相干接收时的性能进行了分析。当采用前向纠错编码时，扩频系统多址容量会明显提高。在保证相同的扩频倍数的情况下，选择适当长度的扩频码和适当的ＦＥＣ码可以在不降低系统性能的同时减少正交码译码所需的运算量。

In this paper,the BERs of coherent and nocoherent orthogonal code spread spectrum multiple access system are analyzed.The multiple access capacity increases greatly when coded systems are used. With same spread of spectrum.the OC-SSMA systems with modest size spreading code combining with proper FEC coding can achieve the same performance of OC-SSMA systems with long spreading code,and decrease the despreading complication of the orthogonal coded spreading spectrum signals.