一个仿真测试4FSK信号的matlab环境GUI程序。可以查看基带IQ波形、眼图、星座图。并可以仿真高斯白噪声、瑞利衰减对信号的影响。-a simulation test 4FSK signal environment Matlab GUI program. Can view IQ base band waveform, eye diagram, constellation map. And can be simulated white Gaussian noise, Rayleigh atte