MDPSK和等概相关二进制信号的性能分析  

Performance Analysis of MDPSK and Equiprobable Correlated Binary Signals

作　　者：叶婷婷[1] 李光球[1] 

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2012年第1期22-26,共5页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(60772067)

摘　　要：该文推导了Nakagami衰落信道上采用组合发射选择合并/接收最大比合并天线分集的M进制差分相移键控、非相干检测的等概相关二进制信号和格雷编码的/4差分四进制相移键控的平均误符号率的精确闭合表达式。研究了信道衰落参数、收发天线数对各调制系统平均误符号率性能的影响。结果表明,当收发天线总数固定时,在高信噪比处,收发天线数乘积越大,组合发射选择合并/接收最大比合并系统的平均误符号率性能越好;当收发天线数固定时,信道衰落参数越大,组合发射选择合并/接收最大比合并方案的误码性能得到显著改善。this paper,we present closed-form expressions for the exact average symbol error rate（SER） of combined transmit antenna selection（SC）/ receive maximum ratio combining（MRC） with a general class of M-ary modulations（including M-ary differential phase shift keying,noncoherent detection of equiprobable correlated binary signals,and differential quaternary phase shift keying with Gray coding） over Nakagami fading channels.We investigate the effects of channel fading parameter and the number of transmit and receive antennas on the average SER performance of the above various modulation schemes.Numerical results show that the average SER performance of the combined SC/MRC system can improve with increased product of the number of transmit and receive antennas at high signal-to-noise ratio regions when the total number of transmit and receive antennas is fixed,and that the average SER performance of the combined SC/MRC system can improve with increased fading parameter.

关 键 词：选择合并 最大比合并 差分相移键控 误符号率 衰落信道 天线分集 

分 类 号：TN911.3[电子电信—通信与信息系统]