单径慢衰落信道模型中带有频差的NOrth-MDPSK性能评估  

Performance evaluation of NOrth-MDPSK with frequency offset in single path slow fading channel model

作　　者：程云鹏[1] 王金龙[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2005年第6期511-516,共6页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家973计划资助项目(5130601)

摘　　要：针对N进制正交扩频和MDPSK复合调制(N O rth-MDPSK),分析了单径慢衰落信道模型中带有频差时的误比特率。首先运用全概率定理和马尔可夫链,建立了性能分析的统一框架;在此框架下,推导了AW GN、瑞利衰落和N akagam i-m衰落信道中的误比特率公式。数值结果表明,与单纯N O rth相比,N O rth-MDPSK以较低的性能损失代价,提供了更高的带宽效率。Focusing on combined N-ary orthogonal spread spectrum and M-ary differential phase shift keying （NOrth-MDPSK）, this paper investigates the bit error rate （BER） with frequency offset in single path slow fading channel model. First the overall probability theorem and Markov chain were applied to establishing a unified framework for performance evaluation, and under this framework, the BER formulas for AWGN, Rayleigh and Nakagami-m fading channels were derived. Numerical results show that NOrth-MDPSK provides higher bandwidth efficiency at the cost of very low performance loss when compared with pure NOrth.

关 键 词：直接序列扩频 M进制差分相移键控 性能评估 误比特率 频差 衰落信道 

分 类 号：TN914[电子电信—通信与信息系统] TN92[电子电信—信息与通信工程]