Multi-Stage Equalizer Gain Control via Adaptive Data Sequence Selection
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Solution Overview
Problem
High-speed serial data receivers face challenges in controlling the gain of multi-stage equalizers due to low-speed clock frequencies, leading to data attenuation and fixed data processing intervals, which affects the accuracy and performance of signal compensation.
Innovation Solution
A method for controlling the gain of a multi-stage equalizer in a serial data receiver involves selecting continuous data sequences, extracting predetermined bits, calculating an equalization gain identifier, and adjusting the gain value based on this identifier, using sliding windows and sequence length values to optimize parameter adjustment and improve compatibility and functional performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a low-speed clock is used for gain detection circuit, then device complexity is reduced, but measurement precision of data processing deteriorates due to fixed interval processing
Solution Approach 1:
The patent applies dynamics by making the data selection process adaptive rather than fixed. The equalization gain identifier calculation dynamically selects different data sequences based on signal conditions, allowing the system to adapt to varying signal qualities while operating at low clock speeds. This resolves the contradiction by enabling precision without requiring high-speed fixed-interval processing.
Solution Approach 2:
The patent changes the parameter of data sequence selection by using multiple different sequence lengths (e.g., 3, 7, 10, 13, 15 bits) and selecting among them based on signal characteristics. This parameter variation allows accurate gain detection at low speeds by choosing optimal data sequences for different signal conditions, rather than using a single fixed processing interval.
2Device complexity
If fixed ratio between serial data rate and working frequency is used, then device complexity is reduced, but adaptability deteriorates causing deviation in equalizer gain control
Solution Approach 1:
The system dynamically adjusts which data sequences are used for gain detection based on signal conditions rather than relying on a fixed clock-to-data-rate ratio. This dynamic adaptation allows accurate equalizer gain control across different data rates and signal conditions without changing the fundamental low-speed clock architecture.
Solution Approach 2:
The patent creates a universal gain detection mechanism that works across different serial data rates by using multiple data sequence options. The same low-speed clock can process various data rates accurately by selecting appropriate data sequences, making the system versatile without increasing complexity.
3Device complexity
If periodic data processing is used at low working frequency, then device complexity is reduced, but loss of information increases due to discarding serial data
Solution Approach 1:
The patent extracts only the necessary information from the serial data stream for gain detection by selecting specific continuous data sequences and extracting predetermined bits. This extraction approach obtains sufficient equalization gain information without requiring high-speed processing of all serial data, minimizing information loss while maintaining low complexity.
Solution Approach 2:
The system performs partial processing by selecting specific data sequences of various lengths (3-15 bits) rather than processing all serial data at high speed. This partial action provides sufficient information for gain detection at low clock speeds without the excessive processing required by full-rate approaches.
Data Source
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AI summary
The invention comprises a method for controlling a gain of a multi-stage equalizer of a serial data receiver, applied to the serial data receiver, the serial data receiver comprising the multi-stage equalizer, wherein the method comprises the steps of: Step S1, enabling the serial data receiver to receive a set of serial data; Step S2, selecting a continuous first data sequence from the set of serial data according to a preset first rule; Step S3, selecting a continuous second data sequence from the first data sequence according to a preset second rule; Step S4, extracting a predetermined bit from the second data sequence; Step S5, calculating an equalization gain identifier of the data sequence by using each predetermined bit; and Step S6, controlling the gain value of the multi-stage equalizer according to the equalization gain identifier. The method has the beneficial effects that data actually processed at a low working frequency are not fixed in periodic data in a serial data stream, so that the compatibility and the functional performance of the serial data receiver are improved.