对数字基带信号在无噪声干扰的情况下采用相干解调方法对2PSK信号无噪声情况下进行解调，具体是通过Matlab6.5集成环境下用M文件调用数字解调函数ddemod编制程序来实现PSK信号的解调。-For digital baseband signal no noise in the coherent demodulation method used to 2 PSK without noise signal of demodulation, specific is through the Matlab6.5 integration environment with M document calls digital demodulation ddemod function program to achieve PSK signal demodulation.