基于导频符号的双多进制正交扩频与MPSK复合调制系统的性能分析  

Performance Analysis of DNOrth-MPSK Hybrid Modulation System Based on Pilot Symbols

作　　者：乔晓强[1] 徐友云[1] 程云鹏[1] 蔡跃明 

机构地区：[1]解放军理工大学通信工程学院,南京210007

出　　处：《上海交通大学学报》2005年第9期1489-1493,1499,共6页Journal of Shanghai Jiaotong University

基　　金：国家重点基础研究发展规划(973)项目(5130601)

摘　　要：提出了一种双多进制正交扩频调制与MPSK相位调制相结合的复合调制方案(DNOrth-MPSK).该方案通过插入导频符号进行信道估计,提高了系统的误比特率性能;同时对其在加性高斯白噪声信道(AWGN)和单径瑞利衰落信道下的理论性能进行了分析,结果表明,这种正交扩频与MPSK相位调制相结合的系统方案较传统的多进制正交扩频系统大大提高了数据的传输速率,因此可适用于高速数据通信.对系统在AWGN和单径瑞利衰落信道中的性能,本文给出了理论下界和仿真结果.A hybrid modulation scheme of dual n-ary orthogonal spread spectrum and MPSK （DNOrth-MPSK） was proposed. The scheme uses pilot symbols to estimate the channel and improves the bit error performance of the system. And the theoretical performance in additive white Gaussian noice （AWGN） channel and single path Rayleigh fading channel was analyzed. The results show that the hybrid modulation scheme of DNOrth-MPSK increases the data rate greatly compared with conventional M-ary orthogonal spread spectrum system, so it can be used for high rate data communication. The paper also presented the theory lower bound and simulation result of the system in AWGN and single path Rayleigh fading channel.

关 键 词：正交扩频 多相移健控 复合调制 

分 类 号：TN911[电子电信—通信与信息系统]