Automatic Gain Control Using Nonzero Saturation Rate Feedback
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Solution Overview
Problem
Conventional analog-to-digital conversion systems face challenges in minimizing quantization distortion, particularly due to unbounded saturation errors in signal processing, which complicates automatic gain control and signal strength detection.
Innovation Solution
The method involves splitting signals into blocks, applying a measurement matrix, indexing, and quantizing each block to calculate a saturation rate, then adjusting the gain based on deviations from a desired nonzero saturation rate to maintain optimal signal acquisition and avoid saturation events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional automatic gain control targets saturation rates close to zero, then saturation events can be used to detect high signal strength, but detecting low signal strength becomes difficult and additional measures are required
Solution Approach 1:
The patent changes the target saturation rate parameter from close to zero (conventional) to a predetermined nonzero value. This parameter change enables the saturation rate itself to provide sufficient feedback for both high and low signal strength detection, eliminating the need for additional measures like signal power monitoring.
2Speed
If saturation rate is used as feedback for automatic gain control, then system responsiveness improves, but conventional systems require additional measures beyond saturation rate alone
Solution Approach 1:
The patent implements a feedback mechanism where the saturation rate directly controls the gain adjustment. By targeting a predetermined nonzero saturation rate, the system uses saturation rate feedback alone (without additional signal power measures) to achieve effective automatic gain control, improving responsiveness while simplifying the feedback system.
3Measurement precision
If conventional AGC uses multiple measures (saturation rate and signal power), then gain control accuracy improves, but system cost and complexity increase
Solution Approach 1:
The patent extracts and eliminates the need for additional signal power measurement measures by optimizing the saturation rate target to a predetermined nonzero value. This allows the saturation rate feedback alone to provide sufficient information for accurate gain control, reducing system complexity and cost while maintaining control accuracy.
Data Source
AI summary
A method for automatic gain control comprising the steps of measuring a signal using compressed sensing to produce a sequence of blocks of measurements, applying a gain to one of the blocks of measurements, adjusting the gain based upon a deviation of a saturation rate of the one of the blocks of measurements from a predetermined nonzero saturation rate and applying the adjusted gain to a second of the blocks of measurements. Alternatively, a method for automatic gain control comprising the steps of applying a gain to a signal, computing a saturation rate of the signal and adjusting the gain based upon a difference between the saturation rate of the signal and a predetermined nonzero saturation rate.