Near homodyne radio frequency receiver

Details Near homodyne radio frequency receiver Near homodyne radio frequency receiver

1994-08-16

1998-10-20

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455324, 4552261, H04B 112

Patent

active

058261800

ABSTRACT:
A radio frequency receiver and method for operating one is disclosed. The receiver includes a tuning unit, an inphase-quadrature (I/Q) mixer, and a calibrated image rejection processor. The tuning unit selectably tunes to a tuning frequency close but not equal to an input modulated radio frequency and creates thereby a periodic signal having the tuning frequency. The I/Q mixer convolves the modulated radio frequency signal with inphase and quadrature versions of the periodic signal and low pass filters the resultant signals. The calibrated image rejection processor corrects at least one of the filtered resultant signals and performs image rejection on the corrected signals.

REFERENCES:
patent: 4584715 (1986-04-01), Baars et al.
patent: 4852123 (1989-07-01), Bickley et al.
patent: 5315620 (1994-05-01), Halawani et al.
patent: 5392330 (1995-02-01), Paniccia, Jr.

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