Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2005-11-29
2005-11-29
Phu, Phuong (Department: 2631)
Pulse or digital communications
Receivers
Automatic gain control
C375S347000, C375S267000, C455S136000
Reexamination Certificate
active
06970523
ABSTRACT:
A multiple channel diversity receiver includes joint automatic gain control (AGC) signal processing wherein the first and second channels of the multiple channel diversity receiver share at least one joint AGC loop. The maximum difference between the AGC feedback signal in the control loop for the first channel and the AGC feedback control signal in the control loop for the second channel is limited to a selectable maximum differential. The AGC control loop with the stronger first RF signal thus limits the maximum amount that the weaker signal is amplified in the AGC control loop with the weaker second RF signal. By limiting the AGC feedback signal in the control loop of the second channel to a maximum differential with respect to the AGC feedback signal in the control loop of the first channel, the weaker signal is not overly amplified thereby avoiding the undue amplification of noise in the second channel.
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Endres Thomas J
Hulyalkar Samir N
Schaffer Troy A
Shah Anand M
Strolle Christopher H
ATI Technologies Inc.
Jacobson Allan
Phu Phuong
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