Voltage Injection Device for Orthogonal Signal Modes
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Solution Overview
Problem
Existing communications systems using multiple conductors face challenges in efficiently injecting signals to enhance transmission capacity and reliability, particularly in achieving orthogonality among injections, which is not adequately addressed by existing methods and devices.
Innovation Solution
A device for voltage multi-injection on multiple conductors, comprising signal inputs, transformers for orthogonal mode injection, differential mode chokes, and conditioners/filters, allowing for common, differential, and pseudo-differential mode injections, ensuring signal orthogonality and coexistence with existing signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If signal injection is performed on multiple conductors to enhance transmission capacity, then communication performance is improved, but signal interference and lack of orthogonality occur
Solution Approach 1:
The device segments the signal injection process by providing separate injection circuits for each conductor, allowing independent control of injection signals on each conductor. This segmentation enables precise control over signal distribution across multiple conductors, achieving orthogonality and minimizing interference while maximizing transmission capacity.
Solution Approach 2:
The device changes the parameter of signal phase relationship by controlling injection signals to be orthogonal (90-degree phase difference) across different conductors. This parameter change ensures that signals on multiple conductors do not interfere with each other, allowing enhanced transmission capacity without signal degradation.
2Ease of operation
If existing capacitative coupling methods are used, then signal coupling is achieved, but only single-ended injection is possible with strict safety measures
Solution Approach 1:
The device provides universal signal injection capability that works across different conductor configurations and safety requirements. It can perform differential mode injection between conductors, pseudo-differential mode injection involving reference planes, and common mode injection, making it adaptable to various communication scenarios without requiring strict ground connections or single-ended operation.
Solution Approach 2:
Instead of coupling signals to a single phase with respect to ground as in existing capacitative coupling methods, this device inverts the approach by enabling differential mode injection between conductors themselves, allowing signals to be injected differentially across multiple conductors without requiring ground connections, thus achieving greater versatility.
3Reliability
If orthogonality among injections is achieved, then signal interference is reduced, but device complexity increases
Solution Approach 1:
The device uses segmented injection circuits, with each conductor having its own injection circuit that can be independently controlled. This segmentation simplifies the overall design by breaking down the complex multi-conductor injection problem into manageable individual circuits, making it easier to achieve and maintain orthogonality without excessive complexity.
Solution Approach 2:
The device introduces intermediary components (injection circuits with controlled impedance and phase shift elements) between the signal sources and the conductors. These intermediaries facilitate orthogonal signal distribution by controlling phase relationships and impedance matching, achieving reliable orthogonality while keeping the overall device structure manageable through modular design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device enables optimal signal injection in multiple conductors, enhancing communication performance by reducing interference and increasing coverage, while accommodating various signal modes and existing signals without interference.
Implementation Method 1
E signal transformers for injecting them by orthogonal modes between different conductors
Implementation Method 2
C differential mode chokes
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Which permits the application of methods for increasing the performance of a communications system on a medium made up of N conductors (51 - 5N) and a reference plane (6) by means of injecting voltage signals (41 - 4N) in up to N combinations of the conductors, including injection in common mode, such that said injected signals can be made to be orthogonal to each other.