摘要
数字通信系统中调制解调技术的选择,直接影响着通信效果。本文介绍了QPSK调制解调的基本原理,通过Simulink建立了COMA通信模型对QPSK调制和OQPSK调制在AWGN信道中的抗噪性能进行了分析比较,其实验结果对实现CDMA系统中通信质量的提高有理论指导意义。
Introduce the basic principle of QPSK modulator and QPSK demodulator. By using the MATLAB simulink system ,design the model which is about antinosie performance of CDMA system＇ s modulate methods on AWGN channel.Then emulate the model and analyse the result.Compete the antinoise performance analysis of QPSK and OQPSK. The modulate methods can choose exactly in actual CDMA systerm and improve the quality of communication.
出处
《仪器仪表用户》
2007年第5期108-109,共2页
Instrumentation
