基于FFT的星上多路FDMA/FSK信号解调研究  

Study on demodulating multi-channel FDMA/FSK signals on board based on FFT

作　　者：潘克刚[1] 张邦宁[1] 郭道省[1] 

机构地区：[1]解放军理工大学通信工程学院卫星通信系,江苏南京210007

出　　处：《通信学报》2006年第8期82-86,共5页Journal on Communications

基　　金：国防预研基金项目(51421010504JB3801)~~

摘　　要：提出了一种基于FFT的星上多路FDMA/FSK信号解调算法。首先分析了该算法的基本原理,证明了其性能与FSK信号理想非相干解调性能相同,同时提出了利用FFT进行频差估计的算法;对系统进行了性能仿真,仿真结果与理论分析一致;该算法实现简单、复杂度低,适合星上处理。An algorithm was proposed to demodulate multi-channel FDMA/FSK signals based on fast Fourier transform（FFT）. The algorithm was analysed in detail theoretically, and it was proved that the performance is the same as that of FSK with ideal non-coherent detection, and it also presented a method of estimating the frequency offset using FFT. Then the system was simulated, which validates the analysis. The algorithm is easy to be realized and is suitable for processing on board.

关 键 词：快速傅立叶变换:多路FSK解调:频差估计 

分 类 号：TN927[电子电信—通信与信息系统]