Orthogonal Differential Vector Signaling for Noise Resilient Data Bus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional differential signaling methods are inefficient in terms of pin-efficiency and susceptible to noise, especially in high-speed communications, requiring multiple wires and increased energy consumption to maintain throughput, while single-ended signaling lacks resilience to noise and reference issues.
Innovation Solution
The implementation of orthogonal differential vector signaling using non-simple orthogonal or unitary matrices for data transformation, allowing for resilient signal transmission over a data bus without a common reference and achieving higher pin-efficiency by transforming signals into a form resistant to common-mode, independent, and reference noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional differential signaling is used, then noise resilience is improved, but pin-efficiency deteriorates and the number of wires increases
Solution Approach 1:
The patent combines multiple signal paths into a unified orthogonal transformation framework where N input signals are transformed into N output signals using a single transformation matrix, reducing the need for separate differential pairs while maintaining noise resilience through the orthogonal transformation properties
Solution Approach 2:
The orthogonal transformation matrix serves multiple functions simultaneously: it performs signal transformation, provides noise rejection, and enables efficient pin utilization. The same transformation structure handles both the signal encoding and the noise immunity, eliminating the need for separate mechanisms
2Reliability
If conventional differential signaling is used, then noise resilience is improved, but energy consumption increases
Solution Approach 1:
The patent merges the signal transmission function with the noise rejection function into a single orthogonal transformation process, eliminating the need for separate differential signaling paths and reducing overall energy consumption while maintaining noise resilience
3Device complexity
If single-ended signaling is used, then pin-efficiency is improved, but noise resilience deteriorates
Solution Approach 1:
The patent changes the transformation parameters from simple single-ended voltage levels to orthogonal transformed signals that incorporate noise rejection properties. The orthogonal transformation matrix is designed to maintain pin-efficiency while introducing noise resilience through its mathematical properties
4Productivity
If higher modulation is used, then information transmission capacity is improved, but susceptibility to reference issues and noise increases
Solution Approach 1:
The patent replaces the mechanical reference voltage system with an orthogonal transformation mathematical framework. Instead of relying on physical reference voltages that are susceptible to noise and drift, the system uses orthogonal transformations that are inherently reference-independent and noise-resistant
Data Source
AI summary
Using a transformation based at least in part on a non-simple orthogonal or unitary matrix, data may be transmitted over a data bus in a manner that is resilient to one or more types of signal noise, that does not require a common reference at the transmission and acquisition points, and/or that has a pin-efficiency that is greater than 50% and may approach that of single-ended signaling. Such transformations may be implemented in hardware in an efficient manner. Hybrid transformers that apply such transformations to selected subsets of signals to be transmitted may be used to adapt to various signal set sizes and/or transmission environment properties including noise and physical space requirements of given transmission environments.