载波相位误差对解调性能的影响分析  

Impact Analysis of Carrier Recovery Error on Demodulation Performance

作　　者：于开勇[1] 李静芳[1] 潘申富[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电通信技术》2014年第1期26-27,40,共3页Radio Communications Technology

基　　金：国家部委基金资助项目

摘　　要：对MPSK、QAM信号载波相位误差对于解调性能的影响进行了定量分析,推导给出了载波估计方差较小时BPSK、QPSK信号载波相位误差对解调性能影响的表达式。根据定量分析结果,载波估计方差较小时对BPSK、QPSK信号载波估计方差与误码率的关系进行了仿真,仿真结果和理论分析结果是一致的。结果表明在Es/N0为2、载波估计方差小于1×10-2的情况下,载波相位误差对于解调性能的影响小于0.2 dB。The impact ofcarrier recovery error for MPSK and QAM signal on demodulation performance is analyzed quantificationally,and the expression of the Es/No with the carrier recovery error in condition of smaller carrier recovery variance for BPSK and QPSK signal is given.Based on the quantitative analysis results, the relation of BPSK and QPSK signal carrier estimate and bit error rate is simulated ,and the simulation results show that the impact of carrier recovery error on demodulation performance can be less than 0.2 dB when Es/N0 is 2 dB and carrier recovery variance is less than 1×10-2.

关 键 词：载波恢复 相位误差 解调性能 

分 类 号：TN911.22[电子电信—通信与信息系统]