2PSK及4PSK调制、加噪、解调、求误比特率程序，程序给出了2PSK和4PSK信号的以上功能的实现，使用者可以用其来作为信号源的使用。-2PSK and 4PSK modulation, noise, demodulation, and bit error rate program, the program gives the realization of the above functions of 2PSK and 4PSK signal, the user can use it as a signal sourcegram