Coaxial Cable MIMO Signal Distribution via Frequency Conversion
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Solution Overview
Problem
Wireless communication with mobile devices is adversely affected by signal fading, multi-path, and electromagnetic wave propagation through walls, necessitating methods and systems to improve communication performance.
Innovation Solution
The use of spatial multiplexing in conjunction with a wire-based medium, where input streams are converted into signals occupying different frequency ranges, transported over the medium, shifted to a single wireless frequency, and transmitted via antennas to achieve spatial multiplexing, thereby mitigating interference and enhancing communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication is used for mobile devices, then communication flexibility and mobility are improved, but signal fading, multi-path interference, and electromagnetic wave propagation through walls deteriorate communication quality
Solution Approach 1:
The system segments the communication process into two distinct parts: wire-based transmission for reliable signal delivery and wireless transmission for mobility and flexibility. The base converter divides the signal into multiple frequency components that can be transmitted over the coaxial cable to different locations, then recombined and transmitted wirelessly. This segmentation allows each medium to perform its strength function - the cable provides reliable signal delivery while wireless provides mobility.
Solution Approach 2:
The patent merges the advantages of wired and wireless communication systems into a hybrid architecture. The base converter combines multiple frequency signals from the coaxial cable into a unified wireless transmission that maintains spatial multiplexing capabilities. This merging allows the system to enjoy both the reliability of wired transmission and the flexibility of wireless transmission simultaneously.
2Productivity
If spatial multiplexing is used to transmit multiple data streams, then communication capacity and efficiency are improved, but wire-based interference and signal degradation worsen transmission quality
Solution Approach 1:
The base converter acts as an intermediary between the wire-based medium and the wireless transmission. It receives multiple frequency signals from the coaxial cable, processes them through spatial multiplexing, and converts them to wireless signals that can be transmitted without wire-based interference. This intermediary function allows the system to benefit from both wired signal delivery and wireless transmission quality.
Solution Approach 2:
The system changes the frequency parameters of the signals during transmission. The base converter receives signals at multiple frequency ranges from the coaxial cable and transforms them to occupy a single wireless frequency range. This parameter change allows the signals to maintain their spatial multiplexing structure while being transmitted wirelessly, avoiding wire-based interference in the process.
3Reliability
If multiple signals are transported over a wire-based medium, then signal delivery reliability is improved, but interference between signals and wire-based noise deteriorates communication quality
Solution Approach 1:
The base converter segments the signal transmission process into distinct stages: receiving multiple frequency signals from the coaxial cable, processing them through spatial multiplexing, and transmitting them wirelessly. This segmentation allows the wire-based medium to deliver signals reliably while the wireless transmission stage avoids wire-based interference, as the signals are converted to wireless format before final transmission.
Data Source
AI summary
Systems and methods for using spatial multiplexing in conjunction with a coaxial cable deployed in-house. Input streams associated with spatial multiplexing are converted into respective signals occupying different respective frequencies. The signals are transported, via a coaxial cable deployed in-house, into a certain room located in-house, thereby enabling a presence of the plurality of signals in the certain room. The signals are shifted into respective output signals that occupy a single wireless frequency by up-converting each signal from the corresponding different frequency into the single wireless frequency. The output signals are transmitted wirelessly, using only the single wireless frequency, via respective antennas located in the certain room, all said antennas operating in conjunction with the single wireless frequency, thereby achieving spatial multiplexing in the certain room and in conjunction with the coaxial cable.