利用CDMA实现高峰值速率业务传送的两种方案及其比较  

Two Approaches to Transporting High Peak Bit Rate Services Using CDMA and Their Comparison

作　　者：马逾钢[1] 洪福明[1] 李乐民[1] 

机构地区：[1]电子科技大学,成都610054

出　　处：《通信学报》1999年第S1期288-292,共5页Journal on Communications

基　　金：电子部预研项目资助

摘　　要：本文研究可变处理增益CDMA(VSG-CDMA)与随机访问多码CDMA(RAMC-CDMA)在频率选择性多径衰落噪声信道(MFNC)中的性能。在建立系统模型后,分析两种系统的输出平均比特误码率对频谱利用率特性,并进行数值计算、仿真和比较。分析表明:VSG-CDMA和RAMC-CDMA都能在不增加射频带宽的前提下提高用户峰值传送速率。在多径衰落信道中RAMC-CDMA的频谱利用率略低于VSG-CDMA。In this paper,we study variable spreading gain CDMA(VSG-CDMA)and random access multi-code CDMA(RAMC-CDMA)in muhipath fading,noise channels (MFNC). First,models of transmitter,channel and receiver are built,then,average error probability versus spectral utiliza tion of each approach is analyzed,evaluated numerically and simulated.It is proved that VSG-CD- MA and RAMC-CDMA can transport higher rate services than common DS-CDMA without extra- bandwidth. The spectral utilization of VSG-CDMA is equal to common DS-CDMA,and is higher than RAMC-CDMA in muhipath fading noise channels.

关 键 词：码分多址 多码码分多址 可变扩频增益码分多址 介质访问控制 多径衰落 

分 类 号：TN929.533[电子电信—通信与信息系统]