Multimode Transmission Line CMIMO for Stable High-Capacity Channels
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Solution Overview
Problem
Conventional wired transmission systems face limitations in channel capacity due to difficulties in generating multiple high-order modes simultaneously and mode coupling, while CMIMO in wireless communication suffers from unstable channel environments and high computational demands.
Innovation Solution
A wired cooperative multiple input multiple output (CMIMO) signal transmission method utilizing a multimode transmission line, which includes designing a multiport excitation and receiving structure to support multiple eigenmodes, optimizing the transmission coefficient matrix for full rank and reversibility, and using these eigenmodes as multiple paths to enhance channel capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mode division multiplexing is applied to wired communication to improve channel capacity, then the channel capacity increases, but mode coupling occurs resulting in reduced channel capacity
Solution Approach 1:
The invention divides the channel into multiple independent spatial paths using MIMO technology with multiple transmit and receive antennas. Each antenna pair creates an independent spatial channel, avoiding the mode coupling problem inherent in mode division multiplexing while still achieving capacity expansion through spatial diversity.
Solution Approach 2:
The invention transitions from mode division multiplexing (operating within the same spatial channel) to spatial multiplexing (utilizing the spatial dimension). By introducing multiple spatial paths through multiple antennas, the system expands the transmission dimension from single-mode to multi-path spatial channels, thereby avoiding mode coupling while improving capacity.
2Productivity
If CMIMO technology is applied to wireless communication to improve channel capacity, then the channel capacity increases, but cooperative jamming and frequent signaling exchange occur due to time-variant channel environment
Solution Approach 1:
The invention inverts the application scenario from wireless CMIMO to wired CMIMO. By applying MIMO technology to wired interconnection systems with stable channel characteristics, the system eliminates the need for frequent channel estimation and signaling exchange required in wireless environments, while retaining the capacity benefits of spatial multiplexing.
Solution Approach 2:
The stable wired channel environment inherently provides consistent transmission characteristics without requiring active channel management. The system leverages the natural stability of wired connections to eliminate the need for frequent signaling and computational overhead associated with wireless channel variations, making the system self-sufficient in maintaining optimal performance.
3Productivity
If a single transmission line is used to generate multiple high-order modes simultaneously to improve channel capacity, then the channel capacity increases, but the excitation structure becomes highly complicated
Solution Approach 1:
The invention combines multiple transmit antennas into a unified MIMO system rather than attempting to generate multiple modes within a single transmission line. This merging approach distributes the complexity across multiple simpler antenna elements rather than concentrating it in a single complex excitation structure, achieving the same capacity goal with reduced individual component complexity.
Solution Approach 2:
The invention uses multiple standard antennas that can each independently transmit signals, rather than requiring a specialized single transmission line with complex mode-generating structures. Each antenna serves multiple functions including transmission, spatial diversity, and channel formation, simplifying the overall system while achieving high capacity through spatial multiplexing.
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 method provides a stable channel environment, reduces computational complexity, and improves channel capacity by utilizing eigenmodes as multiple paths, enhancing energy utilization and signal-to-noise ratios.
Implementation Method 1
a wired cooperative multiple input multiple output (CMIMO) signal transmission method based on the multimode transmission line
Data Source
AI summary
Disclosed is a wired cooperative multiple input multiple output (CMIMO) signal transmission method based on a multimode transmission line. The method includes the following step: selecting a type of the multimode transmission line; constructing a wired CMIMO transmission system based on the multimode transmission line; performing channel measurement to obtain a transmission coefficient matrix; judging whether the transmission coefficient matrix satisfies a full rank and reversibility and has a condition number satisfying conditions; optimizing a structure of the multimode transmission line, a multiport excitation structure, and a multiport receiving structure to obtain the transmission coefficient matrix which satisfies a full rank and reversibility and has a condition number satisfying conditions; making the transmission coefficient matrix be equivalent to a channel matrix of the wired CMIMO transmission system; and completing signal excitation, transmission and reception of the wired CMIMO transmission system based on the multimode transmission line.