Automatic Gain Control (AGC) For Multichannel/Wideband Communications System
AssigneeEdgewater Computer Systems, Inc.
InventorsManish Bhardwaj, Garret Shih
Life of this patent
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Abstract
Automatic Gain Control (AGC) system for multi-channel signals attenuates an incoming multi-channel signal by providing a gain. The system further adjusts each individual channel, of the multi-channel signal, by supplying a second gain if needed. The AGC system is designed to ensure a received signal power is at an optimal level for analog to digital conversion or any other form of signal processing. The system also enables elimination of mid-packet gain adjustments.
Claims22
A multi-channel receiver comprising:
- an outer programmable gain controller controlling gain of a multi-channel signal prior to said multi-channel signal being split into a plurality of individual channels;
- and
- a plurality of inner programmable gain controllers, each inner gain controller controlling gain of one of said individual channels,
- wherein the outer gain controller receives feedback from each individual channel to adjust gain values.
A method of automatic gain control for multi-channel communications comprising:
- automatically controlling gain of a multi-channel signal with an outer programmable gain controller, prior to said multi-channel signal being split into a plurality of individual channels;
- automatically controlling gain of said individual channels with a plurality of inner programmable gain controllers;
- and
- receiving feedback from each channel to adjust gain values.
A multi-channel receiver comprising:
- an attenuation gain control means for adjusting gain for a multi-channel signal, prior to said multi-channel signal being split into a plurality of individual channels;
- a plurality of gain control means for individually adjusting gain of said individual channels of the multi-channel signal;
- and
- a plurality of feedback mechanisms providing feedback from respective individual channels to the outer analog gain controller to adjust gain values.
A multi-channel receiver comprising:
- an outer variable gain amplifier that receives a multi-channel input signal;
- an outer analog gain controller that controls the gain applied to the multi-channel input signal;
- an analog to digital converter that digitizes the multi-channel input signal after gain adjustment;
- a plurality of band pass filters, said filters receiving the multi-channel signal and each filter outputting an individual channel;
- a plurality of inner variable gain amplifiers, each receiving a respective individual channel;
- a plurality of inner digital gain controllers, each controlling the gain applied to a respective individual channel;
- and
- a plurality of feedback mechanisms providing feedback from respective individual channels to the outer analog gain controller to adjust gain values.
Dependencies are inferred from the claim text.