基于多载波和码片交织技术的无线通信新方案  

Novel wireless communication scheme based on multi-carrier and chip interleave

作　　者：沈翠[1] 王琳[1] 魏琴芳[1] 

机构地区：[1]重庆邮电大学编码技术所,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2008年第2期160-164,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：重庆市科委自然科学基金项目(CSTC 2007BB2387)

摘　　要：正交频分复用(OFDM)技术和交织分多址(IDMA)接入技术被认为是适于下一代无线移动通信的关键技术。建立了一种基于多载波和码片交织技术的OFDM-IDMA上行链路系统模型,该系统在发送端采用码片级交织,在接收端采用一种简单的Turbo型迭代结构。随后分析了该系统在AWGN信道下的性能,并和具有相似结构的OFDM-CDMA在多径信道下进行仿真比较。结果表明:在高斯单径信道下,随着信噪比的增加,该系统的多用户曲线会向单用户靠拢,而在多径信道下,系统表现出比OFDM-CDMA更优的多用户性能。Orthogonal frequency division multiplexing （OFDM） and interleave division multiple access （IDMA） are considered as the key techniques of the next generation wireless mobile communications. On the basis of multi-cartier and chip- interleave, an OFDM-IDMA uplink scheme is presented. This system adopts a chip-level interleaving method at the trans- mitter and a simple turbo iterative structure at receiver, Then performance analysis of this system and comparison with OFDM-CDMA have been done in AWGN and multi-path channels respectively. The results demonstrate that the performance curves of multi-user of an OFDM-IDMA system converge to that of single-user when SNR increases in AWGN singlepath channel, and the multi-user＇s performance of this system is better than that of OFDM-CDMA in multi-path channels.

关 键 词：正交频分复用 交织分多址接入 OFDM—IDMA 码片交织 多用户检测 

分 类 号：TN92[电子电信—通信与信息系统]