预先设定载频、采样率、码速率、信息代码个数和信噪比等参数，进行FSK信号的调制解调。-Pre-set carrier frequency, sampling rate, bit rate, information, code number and signal to noise ratio and other parameters for FSK signal modulation and demodulation.

已知一个信道的信噪比，求出相应的误码率，matlab实现，很好用，很多场合需要计算这个。反过来也是可以的。-Known signal-to-noise ratio of a channel, the error rate is obtained, matlab realize, well used, need to calculate the number of occasions. The reverse is also possible.