学习软件无线电的例子，first的代码是一个完整的接收机，经过CICF，HBF，FIRF，鉴频FIR后的结果，还给出了实际解调结果和理论的比较；second 的代码是针对一定带宽内的信号进行信道化处理，给出各个信道的结果并分析信号处于哪个 信道；sikao代码是针对前两个代码的滤波器的一些改进-Learning software radio example, first code is a complete receiver, through the results of CICF, HBF, FIRF, frequency discriminator FIR after demodulation also gives a comparison of actual results and theory　second code is for a certain bandwidth, channel signal within the process, give the results and analysis of each channel signal in which channel　sikao code improvements for the first two code filters