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本文讨论了数字信号经移频键控(FSK)调制后通过信道时的衰耗问题,并利用计算机的快速性,直接根据FSK信号表达式,求出各频率分量作用时的终端功率,再行迭加以得总功率,从而求出信道的衰耗,通用性强.文中还给出了FSK信道设计的计算机实现方法和通用程序,并通过设计实例,给出了几点结论.
In this paper, we discuss the attenuation problem of digital signal after FSK modulation, and use the fastness of computer to find out the terminal power of each frequency component directly according to FSK signal expression. Superposing the total power in order to find out the attenuation of the channel, and has strong versatility.This paper also gives a computer implementation method and a general program of FSK channel design, and gives some conclusions through design examples.