Symbol Interference Cancellation Circuit for High-Speed Signal Accuracy
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Solution Overview
Problem
As semiconductor integrated circuits increase in speed, signal transmission and reception also increase, leading to higher interference between symbols, which complicates accurate and fast signal transmission and reception.
Innovation Solution
A symbol interference cancellation circuit is designed to generate interference-cancelled signals by canceling post cursor components using weight application signals and sampling output signals, with multiple interference cancellation circuits and sampling circuits operating in synchronization with different clock signals to effectively remove interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the transmission and reception speed of signal is increased, then the speed parameter is improved, but interference between signal symbols increases causing deterioration in accuracy
Solution Approach 1:
The patent converts the harmful post cursor interference components into useful cancellation signals by sampling them at specific timings and combining them with inverted polarity to eliminate interference at the decision point, thereby enabling high-speed transmission while maintaining accuracy
2Measurement precision
If interference cancellation circuits are added to cancel post cursor components, then signal accuracy is improved, but circuit area and complexity increase
Solution Approach 1:
The patent merges multiple interference cancellation operations into a unified circuit structure where sampling outputs from different timings are combined through adders and weight application circuits, achieving comprehensive post cursor cancellation while minimizing the number of separate circuits required
Solution Approach 2:
The patent segments the interference cancellation process into distinct stages: sampling at multiple timings, weight application to each sample, and combination through addition, allowing each segment to be optimized independently while working together to solve the overall problem
Data Source
AI summary
A symbol interference cancellation circuit may be provided. The symbol interference cancellation circuit may include an interference cancellation circuit configured for generating an interference-cancelled signal based on weight application signals, sampling output signals, and a clock signal.