Parameter Scanning for Signal Over-Sampling Equalization
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Solution Overview
Problem
Digital receivers face challenges in maintaining signal quality due to variations in data phase, amplitude, and noise, which affect data transmission and result in poor display quality for audio-visual data, especially when dealing with different transmitter characteristics and cable lengths.
Innovation Solution
A method and apparatus for parameter scanning in signal over-sampling receivers, which evaluates signals to determine the 'eye' status and adjusts parameters such as equalization and PLL bandwidth to ensure sufficient signal quality, using techniques like relaxed eye operations and separate equalization monitoring to reduce processing time and improve data recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data tracking and receiver parameter settings are used to address data issues, then some data problems may be mitigated, but signal quality still suffers due to variances in data and noise
Solution Approach 1:
The receiver automatically performs parameter scanning and equalization optimization without requiring manual configuration. The system self-adjusts by evaluating eye opening measurements and selecting optimal parameter combinations, eliminating the need for complex manual setup while improving signal quality across varying transmission conditions.
2Reliability
If multiple samples are taken for each data unit to handle noise, then noise resistance improves, but processing complexity increases
Solution Approach 1:
The parameter optimization process is segmented into distinct phases: initial parameter scanning, eye opening evaluation, and selective refinement. By dividing the complex parameter tuning into manageable segments based on eye opening measurements, the system handles noise effectively without overwhelming processing complexity.
3Reliability
If parameter scanning is performed to identify optimal settings, then signal quality improves, but processing time increases
Solution Approach 1:
The system performs preliminary parameter scanning and eye opening evaluation during initialization or low-traffic periods. By conducting parameter optimization in advance, the system establishes optimal settings before critical data transmission occurs, improving signal quality without causing time loss during actual data transfer.
Solution Approach 2:
Parameter scanning and eye opening measurements are performed periodically rather than continuously. The system monitors eye opening at regular intervals and adjusts parameters only when degradation is detected, maintaining signal quality while minimizing processing time overhead during normal operation.
Data Source
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AI summary
A method and apparatus for parameter scanning for signal over-sampling. An embodiment of an apparatus includes an equalizer to equalize received data values, and a sampler to over-sample the equalized data. The apparatus includes an eye monitor to generate information regarding quality of signal eyes for the over-sampled data, and an equalization monitor to generate information regarding sufficiency of signal equalization. The apparatus further includes a scan engine to scan possible values of a plurality of parameters for the apparatus.