Adaptive Equalizer Control Circuit for Channel Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing equalizer adaptation methods are slow to adapt and often result in inappropriate compensation, leading to unstable system operation and increased intersymbol interference due to channel environment changes.
Innovation Solution
A signal processing device with an equalizer and a control circuit that determines an equalizer control code based on the output signal from the equalizer, allowing for adaptive equalization and minimizing intersymbol interference by adjusting the equalizer gain in response to changes in the channel environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing equalizer adaptation methods are used, then the equalizer can be adapted to channel changes, but the adaptation takes a long time and system operation becomes unstable
Solution Approach 1:
The patent applies preliminary action by using a training signal (preliminary known signal) to pre-adapt the equalizer before actual data transmission. The control circuit determines optimal equalizer control codes during this preliminary training phase, so when channel changes occur, the equalizer is already prepared with appropriate compensation parameters, reducing the time needed for subsequent adaptations.
Solution Approach 2:
The patent implements feedback by having the control circuit continuously monitor the equalizer output signal quality and adjust the equalizer control codes accordingly. The system measures signal characteristics (such as eye opening or signal strength) and feeds this information back to modify the equalizer parameters, enabling rapid adaptation to channel changes while maintaining stable operation.
2Adaptability or versatility
If existing equalizer adaptation methods are used, then the equalizer can compensate for channel distortion, but intersymbol interference is not minimized due to inappropriate compensation size
Solution Approach 1:
The control circuit uses feedback from the equalizer output signal to determine the optimal equalizer control code. By monitoring signal quality metrics (such as eye pattern opening or signal strength) and adjusting the equalizer parameters accordingly, the system achieves appropriate compensation that minimizes intersymbol interference rather than applying fixed or excessive compensation.
Solution Approach 2:
The patent changes the equalizer parameters (control codes) dynamically based on the detected signal characteristics. Instead of using a fixed compensation size, the system adjusts the equalizer gain and other parameters to match the actual channel conditions, ensuring optimal compensation that minimizes intersymbol interference for the specific channel environment.
3Ease of operation
If existing equalizer adaptation methods are used, then the equalizer can operate with fixed gain, but system operation becomes unstable when channel environment changes
Solution Approach 1:
The patent transforms the equalizer from a static fixed-gain device to a dynamic adaptive system. The control circuit continuously adjusts the equalizer control codes based on real-time signal quality measurements, allowing the equalizer to adapt its gain and parameters to changing channel conditions while maintaining simple operation through automated control.
Solution Approach 2:
The system uses feedback from the equalizer output to automatically adjust parameters when channel conditions change. This closed-loop control maintains system stability by detecting degradation in signal quality and applying appropriate compensation, eliminating the need for manual intervention while ensuring reliable operation across varying channel environments.
Data Source
AI summary
Disclosed are a signal processing device and an image display apparatus including the same. The signal processing device comprises an equalizer configured to receive an input signal through a channel and equalize the received input signal and a control circuit configured to determine an equalizer control code in response to a first signal output from the equalizer and output the determined equalizer control code to the equalizer, wherein the equalizer may equalize the received input signal based on the equalizer control code. Accordingly, there is an effect of effectively adapting the equalizer even when a channel environment changes.