QPSK解调器性能参数测试仿真研究  

Simulation Research On the Measurement of Performance Parameters of QPSK

作　　者：康中尉[1] 

机构地区：[1]西南电子电信技术研究所,西南610041

出　　处：《微计算机信息》2008年第4期205-207,共3页Control & Automation

摘　　要：本文首先对QPSK调制方式下,频率偏移和相位偏移对调制信号的影响进行了理论推导,利用matlab建立simulink仿真模型,讨论了符号采样数m,频率偏移Δf和相位偏移ΔФ对解调器误码率、入锁门限、捕捉带宽和同步带宽等测试/性能参数的影响,对QPSK方式解调器的设计、测试和维修等各方面都具有一定的借鉴作用。For QPSK, it discussed that the modulated signal was changed because of different frequency-offset or phase-offset. The simulink scheme of QPSK modulation and demodulation was built on MATLAB to discuss on the Characteristic Parameters of QPSK Demodulator, such as Bit Error Rate(BER),Capture Broadband, Synchronous Broadband and Capture Gate, which were affected by the sampling rate of symbol, frequency-offset and phase-offset. It helped to the design, maintaince or measurement of QPSK demodulator.

关 键 词：QPSK 误码率 入锁门限 同步带宽 捕捉带宽 

分 类 号：TN763[电子电信—电路与系统]