全数字4FSK解调器的性能仿真与分析  

Performance Simulation and Analysis of a Fully Digital 4FSK Demodulator

作　　者：张维[1] 孙鹏飞[1] 

机构地区：[1]哈尔滨工业大学,哈尔滨150001

出　　处：《电子测量与仪器学报》2009年第S1期265-268,共4页Journal of Electronic Measurement and Instrumentation

摘　　要：本文采用了一种全数字的4FSK解调器,解调器的算法较为简单,避免了使用乘法器和分频器这样的昂贵器件。采用simulink对该解调器在白高斯噪声信道和瑞利信道中的误码性能进行仿真,进而分析了载波同步误差对4FSK解调器性能的影响,对存在频率偏移、频率抖动和相位抖动时,对解调器误比特率的影响做了全面的仿真和分析。仿真结果表明该解调器有很好的抗载波频率偏移和频率抖动性能。In this paper,a fully digital 4FSK demodulator is designed without any complex algorithms and expensive hardware such as multipllers and dividers.Code error rate in AWGN channel and rayleigh channel is simulated by the mean of simulink.Then the synchronous performance of 4FSK has been analyzed.The effect of frequency offset,frequency jitter and phase jitter on code error rate is simulated and analyzed thoroughly and precisely.Finally,the computer simulation results show that the performance of the demodulator is not sensitive to frequency offset and frequency jitter.

关 键 词：4FSK 频率偏移 频率抖动 相位抖动 

分 类 号：TN763[电子电信—电路与系统]