Transmission Equalizer Preset Selection for Fast Link Equalization
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Solution Overview
Problem
As data processing speeds increase in electronic devices, the vulnerability of signals to noise also increases, making signal restoration more difficult, especially during link equalization operations.
Innovation Solution
An electronic device capable of performing high-speed link equalization by measuring figure of merit (FoM) values for different presets, identifying the optimal preset type, and transmitting an equalizing setup request to control the transmission equalizer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data transmission speed is increased, then communication efficiency is improved, but signal vulnerability to noise increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission equalizer settings (preset types, preshoot values, de-emphasis values) based on measured FoM values. The system changes these parameters in response to channel conditions to maintain signal quality at high transmission speeds, directly resolving the contradiction between speed and reliability.
2Reliability
If comprehensive preset testing is performed to find optimal settings, then signal quality is improved, but link equalization time increases
Solution Approach 1:
The patent segments the preset testing process into two phases: initial comprehensive testing of all preset types to identify candidate types, followed by focused testing of only those candidate types. This segmentation reduces the total number of measurements required while maintaining signal quality optimization, thereby reducing link equalization time.
Solution Approach 2:
The patent performs preliminary action by conducting initial FoM measurements for all preset types first, then using those results to identify candidate preset types before performing the final selection. This preliminary classification action eliminates the need to test all presets exhaustively, reducing overall equalization time while ensuring optimal signal quality.
3Measurement precision
If multiple FoM measurements are performed for all presets, then optimal preset selection is improved, but measurement complexity increases
Solution Approach 1:
The patent segments the measurement process into distinct stages: initial FoM measurement for all preset types, identification of candidate preset types based on those measurements, and final FoM measurement only for candidate types. This segmentation reduces the total number of measurements and simplifies the overall process while maintaining selection accuracy.
Solution Approach 2:
The patent performs preliminary FoM measurements for all presets to identify which preset types are worth further investigation. This preliminary action filters out poor performing presets early, reducing the complexity of the final selection process while ensuring that the optimal preset is not missed.
Data Source
AI summary
An operation method includes measuring figure of merit (FoM) values for a first group of presets having different preset types, based on equalized signals output from a transmission equalizer included in an external device adjusted based on the first group, identifying a preset type of a first preset corresponding to first FoM value which is a greatest value from among the FoM values for the first group, measuring FoM values for a second group of presets having the identified preset type, based on equalized signals output from the transmission equalizer adjusted based on the second group, determining a second preset corresponding to second FoM value which is a greatest value from among the first FoM value and the FoM values for the second group, and transmitting an equalizing setup request that controls the transmission equalizer to the external device, based on the determined second preset.