卷积码前向纠错CDMA系统中处理增益与编码增益的优化

The Optimization Between Processing Gain and Coding Gain in Convolution Coded Forward Error-correction CDMA System

前向纠错技术与扩频相配合，是提高ＣＤＭＡ系统性能的重要手段之一，但是，在获得编码增益的同时，扩频的处理增益会降低。本文研究了在扩频码分多址系统中采用卷积码前向纠错时，在保证信息传输速率和系统总带宽不变的条件下，处理增益与编码增益之间的相互协调和折衷。

The combination of error-correction with spread-spectrum is one of the important means to improve the performance of CDMA system,however, while coding gain is obtained,processing gain will decrease.In this paper,we discuss the coordination and trade-off between processing gain and coding gain when convolution code is applied to spread-spectrum CDMA system on condition that the total system bandwidth and information rate are fixed.