Method of differential-phase/absolute-amplitude QAM

Details Method of differential-phase/absolute-amplitude QAM Method of differential-phase/absolute-amplitude QAM

2007-07-17

2007-07-17

Tran, Khanh (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S232000, C455S506000

Reexamination Certificate

active

10454808

ABSTRACT:
A method of quadrature amplitude modulation involving encoding phase differentially and amplitude absolutely, allowing for a high data rate and spectral efficiency in data transmission and other communication applications, and allowing for amplitude scaling to facilitate data recovery; amplitude scale tracking to track-out rapid and severe scale variations and facilitate successful demodulation and data retrieval; 2Npower carrier recovery; incoherent demodulation where coherent carrier recovery is not possible or practical due to signal degradation; coherent demodulation; multipath equalization to equalize frequency dependent multipath; and demodulation filtering.

REFERENCES:
patent: 5499268 (1996-03-01), Takahashi
patent: 6006110 (1999-12-01), Raleigh
patent: 6507602 (2003-01-01), Dent
patent: 6683924 (2004-01-01), Ottosson et al.
patent: 6922388 (2005-07-01), Laroia et al.
patent: 7027503 (2006-04-01), Smee et al.
patent: 2003/0087622 (2003-05-01), Jayaraman et al.
patent: 2003/0227968 (2003-12-01), Kim et al.
patent: 2004/0081205 (2004-04-01), Coulson

Affiliated with

Also associated with

Rating

Method of differential-phase/absolute-amplitude QAM does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of differential-phase/absolute-amplitude QAM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of differential-phase/absolute-amplitude QAM will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3792885