Pulse or digital communications – Receivers – Angle modulation
Patent
1996-01-16
1998-11-17
Chin, Stephen
Pulse or digital communications
Receivers
Angle modulation
375326, H03D 322, H04L 2722
Patent
active
058387366
ABSTRACT:
The apparatus and method pertain to generation of two receive carriers which are related to each other in quadrature. The apparatus and method employ a phase-shifter which generates one or more phase-shifted signals from a received signal. A signal selector selects a signal as a function of either a predetermined phase state associated with an initialization symbol during reception of the symbol or an estimated phase state estimated by a demodulation state on the basis of the received signal during reception of the message symbols such that the selected signal constitutes a receive carrier, which is also referred to as a reference carrier. In addition, the selected signal is stored and played back after a symbol duration before delivering the reference carrier. Finally, a second phase-shifter is used to generate a second receive carrier from the reference carrier.
REFERENCES:
patent: 4320345 (1982-03-01), Waggener
patent: 4647863 (1987-03-01), Skudera, Jr. et al.
Avramov, I.D. et al, "A Surface Transverse Wave-Based MSK System", IEEE Transactions on Ultrasonics, Ferroelectrics And Frequency Control, vol. 38. No. 3, 1 May 1991, pp. 194-198, XP 000206316.
Brignol Luc
Christien Florence
Thomas Gerard
ALCATEL N.V.
Chin Stephen
Deppe Betsy L.
LandOfFree
Method and apparatus for generating carriers for phase demodulat 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 generating carriers for phase demodulat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for generating carriers for phase demodulat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-892646