MC-CDMA调制在散射通信信道下的性能分析  

Performance Analysis of MC-CDMA under Troposcatter Fading Channel

作　　者：胡茂凯[1] 陈西宏[1] 薛伦生[1] 王光明[1] 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《电视技术》2013年第7期79-82,共4页Video Engineering

基　　金：国家自然科学基金项目(60971118)

摘　　要：为提高对流层散射通信系统容量和抗干扰能力,对散射信道下的多载波扩频方案进行研究。基于所建立的Rayleigh分布对流层散射信道模型,分析了频域扩频多载波技术MC-CDMA的系统性能,对典型散射信道下的系统误码率进行了分析与仿真。结果表明:MC-CDMA可有效提升散射通信系统容量,单用户时系统误码率性能较好,随着用户数和散射信道多普勒频移的增大,系统误码率随之增大,需采用多址干扰控制和子载波干扰消除技术来改善系统误码率性能。To improve communication capacity and anti-jamming property, multi-carrier spread spectrum modulation is introduced in tropo communi- cation. The trope multipath fading channel is modeled and the MC-CDMA system performance is evaluated. Then, simulations are carried out to evaluate the system BER performance over typical trope channel. Results show that, for a single user, the system has good bit error rate performance, which dem- onstrate that MC-CDMA scheme can improve the trope communication capacity. With the increasing of number of users and the dopploer spread of trope channel, the BER increases. As a result, multi-access interference control and inter-carrier interference cancellation measures should be used to im- prove BER performance.

关 键 词：对流层散射信道 扩频多载波 RAYLEIGH分布 误码率 

分 类 号：TN926[电子电信—通信与信息系统]