Baseband filtering method implemented in the intermediate frequency digital receiver and the receiver

摘要

PURPOSE: To obtain a highly accurate and adaptive intermediate frequency digital receiver without drifts and capable of suiting to various modulation and band width, excluding interference and controlling its characteristics as necessary to attain prefiltering or filtering suited to equalization. ;CONSTITUTION: The digital receiver includes an antenna means 11 for collecting a signal, a means 21 for converting an input signal into a prescribed intermediate frequency signal and a base band processing means 14. The receiver includes also an analog/digital conversion means 15 for receiving the intermediate frequency signal from its input part and utilizing oversampling related to a signal band width and dimension filtering means 9, 10 connecting their output parts to a base band processing means 14 and capable of receiving a converted signal outputted from the means 15 by respective input parts.;COPYRIGHT: (C)1995,JPO