Quadrature phase shift keying (QPSK) and binary phase shift keying (BPSK) modulators are used to change the amplitude, frequency, and/or phase of a carrier signal in order to transmit information.

QAM Modulator and Demodulator combine two amplitude modulation signals into a single data ... The local oscillator generates needed frequency demodulation signals, which are in-phase and quadrature ...

The DVB-S2 demodulator IP core performs all tasks of an inner receiver. Its output perfectly fits the DVB-S2 forward error correction IP core that implements LDPC and ...