δ/θ型相关解扩抑制多址干扰的能力分析  

Analysis of δ/θ Correlation Despreading′s Ability to Suppress Multiple-access Interference

作　　者：龙德浩[1] 陈志清[2] 

机构地区：[1]四川大学,成都610064 [2]成都大学,成都610106

出　　处：《电讯技术》2013年第5期553-559,共7页Telecommunication Engineering

摘　　要：龙德浩、陈志清提出的δ/θ型基带相关检测／解扩方案（《电讯技术））2012年第9期1438-1442页），相对于经典相关解扩，其计算量减少了99．61％，且抗干扰能力较强，但定量分析不足。鉴于此，基于大数定理，分别对VIVS准混沌、m和Walsh等3种扩频码阵列进行了仿真相关解扩。结果表明：在给定AWGN条件下，当多址干扰分别为400条、350条和924条时，δ/θ相关解扩较经典相关解扩的BER减小了2-3个数量级。The computation burden of δ/θ base band correlation detection/despreading scheme proposed by LONG De-hao and CHEN Zhi-qing in Telecommunication Engineering（No. 9,2012, Page 1438 - 1442）, is re- duced by 99.61% relative to the classical correlation detection/despreading, and its anti-interference ability is stronger, but quantitative analysis is insufficient in that paper. In view of this, based on the law of large num- bers, three spreading code arrays （VIVS quasi-chaotic, m and Walsh） are performed δ/θ correlation despread- ing respectively through simulation, and the results show that the BER of the δ/θ despreading is reduced 2 to 3 orders of magnitude relative to the classical correlation despreading in the conditions of given AWGN while the number of multiple-access interference is 400,350 and 924, respectively.

关 键 词：CDMA系统 多址干扰抑制 多用户干扰抑制 δ θ相关解扩 

分 类 号：TN914.4[电子电信—通信与信息系统] TN914.5[电子电信—信息与通信工程]