Pulse or digital communications – Receivers – Angle modulation
Patent
1998-05-13
2000-06-13
Vo, Don N.
Pulse or digital communications
Receivers
Angle modulation
375332, 329304, H04L 2714, H04L 2716
Patent
active
060758260
ABSTRACT:
A method and apparatus for determining initial carrier and symbol phase estimates in a burst mode digital communication system are described. In-phase and quadrature sample of a BPSK preamble are sampled to obtain correlation values. Next, sum and differences of the correlation values are obtained. Then the initial carrier phase estimate (THETAHAT) and the initial symbol phase estimate (TAUHAT) are obtained through application of an algorithm. The apparatus that implements the method consists of adders, inverters, arc tangent look-up tables and divide by 2 logic units.
REFERENCES:
patent: 4313205 (1982-01-01), Rhodes
patent: 4847869 (1989-07-01), Labedz et al.
patent: 4856027 (1989-08-01), Nakamura et al.
patent: 4885756 (1989-12-01), Fontanes et al.
patent: 5001727 (1991-03-01), McDavid
patent: 5131008 (1992-07-01), Kazecki et al.
patent: 5170415 (1992-12-01), Yoshida et al.
patent: 5272446 (1993-12-01), Chalmers et al.
S.A. Rhodes et al.; "Digital On-Board Demodulator for Reception of an Up-Link Group of TDMA/QPSK Channels"; Apr. 1989; pp. 1-8.
Comsat Corporation
Vo Don N.
LandOfFree
Method and apparatus for obtaining initial carrier and symbol ph 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 and apparatus for obtaining initial carrier and symbol ph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for obtaining initial carrier and symbol ph will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2075585