MIMO Optical Transceiver Node Orientation
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Solution Overview
Problem
Existing visible light communication systems using MIMO architecture with multiple LEDs and PDs require separate deployment of transmitters and receivers, hindering unified signal processing.
Innovation Solution
Implementing a MIMO communication system with optical transmission modules of different orientations on a centralized transmitter node and optical detection modules of different orientations on a centralized receiver node, allowing for unified signal processing and avoiding overlapping links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple LEDs and multiple PDs are deployed separately in different positions to achieve MIMO architecture, then spatial multiplexing and transmitting/receiving diversity are achieved, but unified processing of signals becomes difficult
Solution Approach 1:
The patent merges multiple separate transmitter nodes (LEDs) and receiver nodes (PDs) into centralized transmitter and receiver units. Each centralized node contains multiple optical transmission modules and optical detection modules respectively, allowing unified signal processing while maintaining spatial multiplexing capability through the multiple modules within each node.
Solution Approach 2:
The patent segments the centralized transmitter node into multiple optical transmission modules with different orientations, and the centralized receiver node into multiple optical detection modules with different orientations. This segmentation enables independent signal transmission and reception paths while maintaining centralized control for unified processing.
2Adaptability or versatility
If multiple LEDs and multiple PDs are deployed separately, then MIMO architecture is achieved, but overlapping links occur between different transmitter-receiver pairs
Solution Approach 1:
The patent employs asymmetric orientation configurations for the optical transmission modules and optical detection modules. Different modules within the same node have different orientations, which creates non-overlapping transmission and reception beams, thereby avoiding link overlap interference while maintaining MIMO architecture.
3Reliability
If transmitters and receivers are deployed separately, then spatial diversity is achieved, but centralized signal processing is hindered
Solution Approach 1:
The patent combines multiple transmitters and receivers into centralized nodes that maintain spatial diversity through multiple modules while enabling unified signal processing. The centralized architecture allows coordinated control and processing of signals from multiple modules, resolving the contradiction between spatial diversity and processing unity.
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
This configuration enhances channel capacity and diversity gains in indoor visible light communication systems by enabling independent and non-overlapping links between LEDs and PDs, facilitating improved multiplexing and unified signal processing.
Implementation Method 1
receiving, by a number of optical detection modules of a receiver node, an optical signal transmitted by a number of optical transmission modules of a transmitter node
Implementation Method 2
receiving, by a number of optical detection modules of a receiver node, an optical signal transmitted by a number of optical transmission modules of a transmitter node
Data Source
AI summary
Embodiments of the present disclosure provide a MIMO communication method and system, and a receiver node. The method includes: receiving, by a number of optical detection modules of a receiver node, optical signals transmitted by a number of optical transmission modules of a transmitter node. Different optical detection modules of the receiver node have different orientations, and different optical transmission modules of the transmitter node have different orientations.