Digital radio receiver

Details Digital radio receiver Digital radio receiver

1995-11-22

2000-03-07

Pham, Chi H.

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375349, 324670, H03D 100, H04L 2706

Patent

active

060350040

ABSTRACT:
An inexpensive, compact digital radio receiver corrects IQ imbalance, non-orthogonal I and Q phases, and DC offset by a DSP. The digital radio receiver is equipped with an antenna, an RF/IF converter for converting a radio frequency into an intermediate frequency, an IQ separator for separating I and Q, a filter for eliminating a noise such as a radio frequency, a multiplying sampler for sampling the output of the filter, and a digital signal processing unit mainly comprised of the DSP which implements an algorithm for estimating and correcting an IQ distortion and also performs quadrature phase demodulation. The IQ distortion can be removed inexpensively by making use of a part of a standard radio operation, hardly requiring the use of hardware for adjustment.

REFERENCES:
patent: 4507617 (1985-03-01), Sasaki
patent: 5168507 (1992-12-01), Critchlow et al.
patent: 5245611 (1993-09-01), Ling et al.
patent: 5396190 (1995-03-01), Murata
patent: 5404378 (1995-04-01), Kimura
patent: 5552749 (1996-09-01), Nowatski et al.

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