Method and apparatus for providing a digital automatic gain...

Details Method and apparatus for providing a digital automatic gain... Method and apparatus for providing a digital automatic gain...

2011-05-03

2011-05-03

Ahn, Sam K (Department: 2611)

Pulse or digital communications

Receivers

Automatic gain control

Reexamination Certificate

active

07936850

ABSTRACT:
A method and apparatus for providing a digital automatic gain control (AGC) for a radio-frequency (RF) receiver. The receiver comprises a logarithmic analog-to-digital converter for sampling the analog RF signals, a FIR filter for filtering the digitized signals, a resampler for resampling the digitized signals, and an automatic gain control circuit. The AGC circuit controls the resampling process to provide automatic gain control function in the digital domain. The resampler circuit has as its input a digital signal having a first plurality of bits. The output signal from the resampler has a second plurality of bits, where the second plurality of bits are less than the first plurality of bits. The automatic gain control circuit controls the resampling of the first plurality of bits to form the second plurality of bits in accordance with an automatic gain control signal.

REFERENCES:
patent: 5083304 (1992-01-01), Cahill
patent: 2003/0145328 (2003-07-01), Rabinowitz et al.
patent: 2003/0227986 (2003-12-01), Filipovic

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