无线电工程2015，Vol.45Issue(10)：38-40,3.DOI:10.3969/j.issn.1003-3106.2015.10.10
相位噪声对QPSK解调性能的影响
Effect of Phase Noise on Demodulation Performanceof QPSK System
朱良彬1
作者信息
- 1. 中国电子科技集团公司第五十四研究所, 河北 石家庄050081
- 折叠
摘要
Abstract
QPSK modulation technology is widely applied for its many merits such as ideal bit error rate and higher spectrum efficiency.But the phase noise brought by the complicated signal processing can affect the performance of QPSK demodulation.In this paper,the model of QPSK influenced by phase noise is given.Based on the analysis of the phase noise effect on QPSK demodulation,the result is presented that the phase noise can result in the constellation diagram point shift, which worsens the performance of QPSK system.A simulation is done to validate the effect of phase noise on the bit error rate(BER)performance.Finally,the paper finds out that the Low Density Parity Check Codes(LDPC)can reduce the influence of the phase noise on QPSK demodulation,improving the BER performance,and through the simulation shows the applicable condition of the LDPC code to improve the BER performance.关键词
QPSK/相位噪声/星座图/LDPCKey words
QPSK/phase noise/constellation diagram/LDPC分类
信息技术与安全科学引用本文复制引用
朱良彬..相位噪声对QPSK解调性能的影响[J].无线电工程,2015,45(10):38-40,3.
