Adaptive Equalization for Wide Signal Amplitude Ranges
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Solution Overview
Problem
Existing adaptive equalization systems fail to accurately compensate for channel loss across a wide range of signal amplitudes, often resulting in either over-equalization or under-equalization, which inadequately reverses signal distortions.
Innovation Solution
The method involves detecting the peak amplitude of the equalizer output signal, selecting a set of reference voltage levels, and iteratively adjusting the equalization level based on hit counts to determine the optimal equalization level, ensuring accurate compensation for channel loss across varying amplitudes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing adaptive equalization systems are used, then equalization can be performed, but accurate compensation for channel loss cannot be achieved across a wide range of signal amplitudes
Solution Approach 1:
The patent implements dynamic adaptation of equalization parameters based on detected signal amplitude. The system automatically adjusts equalization levels by comparing hit counts against reference voltage levels and modifying equalization accordingly, enabling reliable equalization across varying signal amplitudes without manual intervention.
Solution Approach 2:
The system changes equalization parameters dynamically based on signal characteristics. By detecting peak amplitude and adjusting equalization levels through controlled modifications (increasing or decreasing based on over/under-equalization detection), the system maintains accurate compensation across different signal conditions.
2Device complexity
If fixed equalization levels are applied, then device complexity is reduced, but over-equalization or under-equalization occurs
Solution Approach 1:
The equalization system performs self-adjustment by automatically detecting signal amplitude, comparing hit counts to reference levels, and modifying equalization parameters without external control. This self-service mechanism maintains signal reproduction accuracy while avoiding the complexity of manual adjustment interfaces.
Solution Approach 2:
The system implements feedback control by continuously monitoring equalization output through hit count comparisons and adjusting equalization levels based on detected performance. The feedback loop identifies over-equalization or under-equalization conditions and automatically corrects them, maintaining precision without complex external control systems.
3Reliability
If adaptive equalization is implemented, then signal distortion reversal is improved, but device complexity increases
Solution Approach 1:
The patent segments the equalization process into distinct operational phases: initial equalization application, hit count collection, distribution evaluation, and equalization adjustment. This segmentation simplifies the overall system by breaking down complex adaptive equalization into manageable, sequential steps that can be implemented with straightforward control logic.
Data Source
AI summary
Methods and systems of adaptive equalization to compensate channel loss are disclosed. A method includes detecting a peak amplitude of an equalizer output signal and selecting a set of reference voltage levels from M sets based on the peak amplitude of the equalizer output signal, each of the M sets having N reference voltage levels. The method includes continuing to increase an equalization level in predetermined steps to a next higher equalization level if the applied equalization level does not correspond to the over-equalization level and evaluating the distribution of the resulting hit counts for each increase to the next higher equalization level until the applied equalization level corresponds to the over-equalization level. The method includes decreasing to the previously applied lower equalization level if the applied equalization level corresponds to the over-equalization level.