High-efficiency circuit for demodulating carriers in quadrature

Details High-efficiency circuit for demodulating carriers in quadrature High-efficiency circuit for demodulating carriers in quadrature

2006-09-19

2006-09-19

Shingleton, Michael B (Department: 2817)

Demodulators

Phase shift keying or quadrature amplitude demodulator

C329S308000, C329S309000, C375S340000, C375S324000, C375S331000, C375S329000, C375S345000

Reexamination Certificate

active

07109787

ABSTRACT:
A demodulation circuit for demodulating a received signal including carriers in quadrature modulated by digital signals and/or in which the processing is performed on two carriers in quadrature. The circuit includes a demodulator, an analog-to-digital converter, a correcting circuit, and a derotator. The correcting circuit provides signals to the derotator based on the derotator output signals and on signals provided by the analog-to-digital converter.

REFERENCES:
patent: 5440587 (1995-08-01), Ishikawa et al.
patent: 5550869 (1996-08-01), Gurantz et al.
patent: 5604929 (1997-02-01), Loper et al.
patent: 5705949 (1998-01-01), Alelyunas et al.
patent: 6034564 (2000-03-01), Iwamatsu
patent: 6310513 (2001-10-01), Iemura
patent: 406284159 (1994-10-01), None
Jou et al. “Design of Carrier Recovery for QAM/VSB dual Mode” IEEE International Conference on Communications vol. 2, Jun. 29, 2002 pp. 1535-1539.
Horn “Basic Electronics Theory” 4thEdition, TAB Books, 1994 pp. 336-337.
French Search Report from French Patent Application 02/03256, filed Mar. 15, 2002.

Affiliated with

Also associated with

Rating

High-efficiency circuit for demodulating carriers in quadrature does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High-efficiency circuit for demodulating carriers in quadrature, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-efficiency circuit for demodulating carriers in quadrature will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3554879