BER Estimation Using DME Coding Violations in PHY Receivers
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Solution Overview
Problem
Existing technologies face challenges in efficiently estimating and correcting bit error rates in signals transmitted through shared transmission media of wired local area networks, particularly in noisy environments like automotive networks, due to complex Digital Signal Processing techniques that consume significant power and chip real estate.
Innovation Solution
The use of Differential Manchester Encoding (DME) coding violation rates to estimate bit error rates, combined with oversampling and quadrature clocks to identify missing transitions, allows for efficient bit error correction without requiring complicated analog support circuitry, leveraging DME violation correction to improve network reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Digital Signal Processing techniques are used to estimate and correct bit error rates, then measurement precision is improved, but use of energy and device complexity increase significantly
Solution Approach 1:
The patent extracts the essential function of BER estimation from complex DSP algorithms and implements it through a simplified counter-based mechanism that counts coding violations directly, eliminating the need for sophisticated signal processing while maintaining estimation accuracy
Solution Approach 2:
The invention replaces expensive, power-intensive DSP hardware with inexpensive counter registers and simple comparison logic that consume minimal power, effectively substituting complex computational resources with simple, low-cost architectural elements
2Measurement precision
If Digital Signal Processing techniques are used to estimate and correct bit error rates, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent removes the complex DSP processing block from the architecture and replaces it with simple counter registers and violation detection logic, significantly reducing the area occupied on the chip while preserving the core functionality of BER estimation
Solution Approach 2:
The invention uses simple counter registers to copy and accumulate violation events over time, creating a statistical representation of BER without requiring complex computational hardware, thereby reducing device complexity
3Reliability
If oversampling and quadrature clocks are used to identify missing transitions, then reliability is improved, but use of energy increases
Solution Approach 1:
The patent employs periodic oversampling at quadrature clock phases to detect transitions, using rhythmic sampling intervals that improve reliability through multiple observation points while maintaining energy efficiency by limiting sampling to specific periodic moments rather than continuous monitoring
4Reliability
If DME violation correction is used to correct bit errors, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the error correction function from complex algorithms and implements it through a straightforward process of inverting corrected symbols based on detected coding violations, simplifying the correction logic while maintaining reliability improvements
Data Source
AI summary
Physical layer devices and related methods for determining Bit Error Rates (BERs) and correcting errors in signals received through shared transmission media of wireless local area networks are disclosed. A physical layer device is configured to identify coding violations in received signal, determine a rate of the coding violations in the signal, and estimate a BER of the signal to be equal to the determined rate of the coding violations. A physical layer device is configured to invert a half symbol immediately preceding or immediately following a coding violation based, at least in part, on signal integrities of the half symbol immediately preceding and the half symbol immediately following the coding violation to correct a bit error.