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.

Here, the signal power is the required power ... Quadrature Phase Shift Keying (QPSK): A technology (modulation scheme) conveys digital data by a carrier wave (radio wave)This uses four symbol ...