Pulse or digital communications – Receivers – Automatic gain control
Patent
1995-06-30
1998-03-10
Bocure, Tesfaldet
Pulse or digital communications
Receivers
Automatic gain control
375219, H04L 2708, H04L 138
Patent
active
057270317
ABSTRACT:
The present invention provides accurate, unbiased adaptive gain control in high speed digital communications systems. The probability of receiving each of a plurality of symbols to be transmitted over a data communications channel is determined for the predetermined communications protocol used over that data communications channel. Based on the probability determined for each symbol, an adaptive gain control adjustment factor is established for each symbol. During active communications, symbols transmitted over the data communications channel are detected, and the adaptive gain control value is selectively adjusted using an adjustment factor established for the detected symbol. Accordingly, adaptive gain control updating in accordance with one embodiment of the invention employs different step sizes for incrementing and decrementing the adaptive gain control value depending on the magnitude of the symbol received.
REFERENCES:
patent: 3562504 (1971-02-01), Harris
patent: 4161628 (1979-07-01), McRae
patent: 4207523 (1980-06-01), Acker
patent: 4251881 (1981-02-01), Ruether et al.
patent: 4623934 (1986-11-01), Taylor
patent: 4625240 (1986-11-01), Yablonski et al.
patent: 4683578 (1987-07-01), Betts et al.
patent: 4829593 (1989-05-01), Hara
patent: 4868850 (1989-09-01), Kaku et al.
patent: 4972430 (1990-11-01), Cantwell
patent: 4982428 (1991-01-01), Agazzi et al.
patent: 5023869 (1991-06-01), Grover et al.
patent: 5029182 (1991-07-01), Cai et al.
patent: 5208846 (1993-05-01), Hammond et al.
patent: 5233634 (1993-08-01), Vaisanen
patent: 5245556 (1993-09-01), Morgan et al.
patent: 5295178 (1994-03-01), Nickel et al.
patent: 5313172 (1994-05-01), Vagher
patent: 5517527 (1996-05-01), Yu
Fertner Antoni
Solve Torkel C.J.
Bocure Tesfaldet
Telefonaktiebolaget LM Ericsson
LandOfFree
Adaptive gain controller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adaptive gain controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive gain controller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-146314