Multiplex communications – Wide area network – Packet switching
Patent
1992-04-27
1994-01-04
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
4552341, 375 98, H04J 316
Patent
active
052766853
ABSTRACT:
There is provided a method of digital Automatic Gain Control (AGC) in a receiver having limited dynamic range, particularly for discontinuous signals. The method comprises detecting the level of a received and AGC'd discontinuous signal, comparing the level of the AGC'd signal relative to the dynamic range of the receiver, and adjusting the AGC to establish a desired relationship between the AGC'd signal and the dynamic range limitation. There is also provided a method of handoff in a TDMA cellular-type transmission system utilizing this method of AGControl.
The method for Automatic Gain Control (AGC) of discontinuous signals in a receiver having limited dynamic range is further characterized by: digitizing a received and AGC'd discontinuous signal and converting the digitized samples to a power sample to sense the power of and detect the level of the signal, comparing the level of the AGC'd signal relative to the dynamic range of the receiver; and coarsely-adjusting by either progressively attenuating the signal until it falls within the dynamic range of the receiver or by progressively gain-amplifying the signal until it falls within the limited dynamic range of the receiver and finely-adjusting the AGC of the received signal until optimum use of the full (albeit limited) dynamic range of the signal processing stages is about 6-12 dB below maximum sensitivity to establish a desired relationship between the AGC'd signal and the dynamic range limitation.
REFERENCES:
patent: 3688196 (1972-08-01), Doelz
patent: 4606051 (1986-08-01), Crabtree et al.
patent: 4648100 (1987-03-01), Mardirosian
patent: 4656630 (1987-04-01), Miyo
patent: 4696027 (1987-09-01), Bonta
patent: 4747114 (1988-05-01), Martinez
patent: 4764732 (1988-08-01), Dion
patent: 4829593 (1989-05-01), Hara
patent: 4912705 (1990-03-01), Paneth et al.
patent: 5005186 (1991-04-01), Aono et al.
patent: 5012491 (1991-04-01), Iwasaki
patent: 5029162 (1991-07-01), Epps
patent: 5083304 (1992-01-01), Cahill
Borth David E.
Cerny, Jr. Frank J.
Kepler James F. M.
Jung Min
Motorola Inc.
Motsinger F. John
Olms Douglas W.
Sonnentag Richard A.
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