GENERATION OF A COHERENT SIGNAL USING AN ADAPTIVE FILTER FOR CANCELLING AND SYNCHRONOUS DETECTION IN A DIGITAL RADIO RECEIVER

摘要

A digital radio receiver generates coherent signals for synchronous detection without use of a phase-locked loop by employing an adaptive notch filter (40) to cancel the desired signal. The cancelling signal is employed as the coherent signal for synchronous detection. The invention obtains faster locking to the desired signal, a wider capture range, and more efficient software coding in a digital signal processing receiver.