Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2005-10-03
2010-11-09
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Receivers
Automatic gain control
C375S316000, C330S129000, C455S234100
Reexamination Certificate
active
07830991
ABSTRACT:
A digital signal processing-based receiver architecture performs automatic gain control (AGC) for a frequency hopping spread-spectrum communications receiver that may be subjected to one or more sources of interference or jamming. Rather than set the AGC gain at a fixed, best hoped for value, and then attempt to rely on decoding or interleaving to interpolate lost or degraded data, the present invention, through repeated but aperiodic transitions or hops across a plurality of frequency bins of interest, develops a gain profile for the plurality of frequency bins, and uses the gain profile to adjust, on a hop-by-hop basis, the gain for the channel/bin to which the receiver is listening, so as to maintain the average aggregate input signal power at an optimal ADC loading factor.
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Beadle Edward R.
Dishman John F.
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Harris Corporation
Lam Kenneth
Liu Shuwang
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