DIGITAL PHASE MAPPER FOR QUADRUPLE PHASE SHIFT KEYING MODULATOR

摘要

a phase control part(210) which outputs a phase shift keying data signal to control the phase of a carrier wave according to 2 bit state after separating the column of modulation data(MOD_DATA) into two channels and converting to parallel data of 2 bit; and a modulation process part(220) which generates quadruple phase shift keying modulated wave(MOD1-MODn) by adding carrier wave instantaneous phase data(P_AC1-P_ACn) to data phase-controlled by the phase control part(210).