A delta-sigma baseband phase detector realizing AGC-free PSK and FSK receivers

摘要: By directly detecting the phase of a baseband signal from ratio in-phase and quadrature components, delta-sigma detector can realize an AGC-free mobile communication receiver. The paper studies performance applied to digital systems. We explain theoretically quantization noise show PSK/FSK receiver using it. Simulation results tell that required clock frequency is less than tenth conventional scheme which detects limiting-amplified IF by processing.