To study the digital modulation techniques such as on-off keying (OOK), amplitude shift keying (ASK),frequency shift keying (FSK), binary phase shift keying (BPSK) and phase shift keying (PSK) pass band modulation and demodulation using MATLAB Simuli

QPSK，oQPSK调制仿真，基带信号，经过带通滤波器以后的时域图形，频域波形。(QPSK, oQPSK modulation simulation, baseband signal, through the band pass filter after the time domain graphics, frequency domain waveform.)