Modulation Analog Baseband Modulation FM Demodulator Baseband FM Modulator Baseband Analog Passband Modulation DSB AM Demodulator Passband DSBSC AM Demodulator Passband DSB AM Modulator Passband DSBSC AM Modulator Passband Digital Modulation APSK M-APSK Demodulator Baseband M-APSK Modulator Baseband OFDM OFDM Modulator OFDM Demodulator PM BPSK Modulator Baseband BPSK Demodulator Baseband DBPSK Demodulator Baseband DBPSK Modulator Baseband DQPSK Modulator Baseband DQPSK Demodulator Baseband M-PSK Demodulator Baseband M-PSK Modulator Baseband QPSK Demodulator Baseband QPSK Modulator Baseband PAM/QAM General QAM Demodulator Baseband General QAM Modulator Baseband Rectangular QAM Modulator Baseband Rectangular QAM Demodulator Baseband