自己编程产生一种四进制相位调制信号，为数字调制信号的识别做准备。-programming to produce a quaternary phase modulation signal, the recognition of digital modulation signals in preparation.

该代码可以实现神经网络对信号的训练以及测试，应用部分是对ASK,2ASK,PSK,4PSK,FSK,4FSK的等的识别-Neural networks, neural networks, function, simulation, neural network, function