Signal Processing Device for Crosstalk Suppression in Multi-Phase Systems
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Solution Overview
Problem
High-speed communication systems, particularly those using multiple phases and lines, face challenges in suppressing crosstalk and maintaining signal quality due to increased attenuation and crosstalk interference, which degrades waveform quality.
Innovation Solution
A signal processing device incorporating dual comparators, delay units, and subtractors to compare signals with threshold values and subtract delayed comparison results, effectively reducing crosstalk through decision feedback equalization (DFE) or feed forward equalization (FFE) techniques, which are applicable to systems with multiple phases and lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-speed transmission is implemented in multi-phase systems, then data transmission rate is improved, but crosstalk interference increases and waveform quality deteriorates
Solution Approach 1:
The received signal is segmented into multiple components through parallel comparison operations with different threshold values. Multiple comparators process different aspects of the signal simultaneously, dividing the complex signal processing task into manageable segments that can be processed independently and then combined to suppress crosstalk.
Solution Approach 2:
The delay unit introduces a predetermined time delay to the comparison results before they are combined. This preliminary timing adjustment aligns the signals properly for constructive interference of the desired signal while causing destructive interference of the crosstalk components, enabling effective suppression before final signal reconstruction.
2Measurement precision
If multiple comparators are used for signal processing, then signal quality is improved, but device complexity increases
Solution Approach 1:
Each comparator in the parallel configuration serves multiple functions: it compares the received signal against a specific threshold, generates a binary decision output, and contributes to the overall crosstalk suppression through its delayed output. This multi-functionality justifies the use of multiple comparators by maximizing their utility in a single integrated system.
Solution Approach 2:
The outputs from multiple comparators are merged through addition in the combining unit. This merging operation integrates the decisions from multiple threshold comparisons into a single enhanced signal that benefits from the collective information, achieving superior signal quality without requiring each individual comparator to be overly complex.
Data Source
AI summary
The present technology relates to a signal processing device, a signal processing method, and an electronic device that reduce the influence of crosstalk. In one example, a signal processing device includes a plurality of comparators; a delay unit adapted to delay output of each of the plurality of comparators; and a subtractor adapted to subtract, from a supplied signal, a signal from the delay unit. The signal processing device processes signals transmitted in N phases and includes (N-1) or more comparators. Each of the plurality of comparators has a different threshold value set and compares a received signal with the threshold value, and in a case where the signal transitions between a plurality of voltage levels, the threshold value is set to a value within adjacent voltage levels. In a second example, a reception device that receives a signal transmitted in multiple phases and via multiple lines.