MIMO Signal Processor Frequency to Spatial Diversity Conversion
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Solution Overview
Problem
Current communication systems face challenges in efficiently managing and transmitting signals between multiple-input multiple-output (MIMO) systems, particularly in transitioning between wireline and wireless mediums while maintaining signal diversity and minimizing interference.
Innovation Solution
The system employs a signal processor configured to facilitate both wireline and wireless signaling by converting frequency diverse signals into spatially diverse signals, using remote antenna units and end stations to enhance spatial diversity and beamforming, allowing for seamless communication over hybrid-fiber coax (HFC) networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency diverse signals are transmitted over multiple paths in MIMO systems, then capacity and throughput are increased, but signal interference and complexity of managing multiple paths worsen
Solution Approach 1:
The patent segments the transmission medium into distinct wireline and wireless portions, allowing separate optimization of each segment. The wireline portion uses frequency diverse signals for robust long-haul transport, while the wireless portion leverages spatial diversity for capacity enhancement, thereby managing interference through medium segmentation
Solution Approach 2:
The patent introduces an intermediary conversion process where frequency diverse signals from the wireline medium are transformed into spatially diverse signals for the wireless medium. This intermediary transformation allows the system to leverage the advantages of both signaling types while mitigating their respective disadvantages
2Reliability
If remote antenna units are used to enhance spatial diversity, then signal reliability and capacity are improved, but device complexity and cost increase
Solution Approach 1:
The patent transitions from frequency diversity (one dimension) to spatial diversity (another dimension) when signals move from wireline to wireless transmission. Remote antenna units are strategically positioned at different geographic locations to create spatial separation, enabling diversity gain without requiring complex processing at each antenna location
3Length of moving object
If hybrid-fiber coax networks are used for wireline transport, then long-haul signal transmission is enabled, but adaptation to wireless mediums and maintaining signal diversity becomes more difficult
Solution Approach 1:
The patent applies parameter changes by transforming signal characteristics from frequency diversity (suitable for wireline HFC networks) to spatial diversity (suitable for wireless transmission). This parameter transformation allows seamless adaptation between different transmission mediums while maintaining signal integrity and diversity benefits
Data Source
AI summary
A multiple-input multiple-output (MIMO) capable system is contemplated. The communication system may include a signal processor configured to separate an input stream into multiple signal paths to facilitate simultaneous transport through a communication medium. The capability to simultaneously transmit multiples signal paths may be beneficial in order to maximize throughput and/or minimize expense.