Multiplexing Apparatus Reducing RF Cable Count
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Solution Overview
Problem
The increasing number of radio frequency cables in cell towers is costly to install and maintain, and poses wind-loading challenges for telecom carriers, necessitating a reduction in cable count while ensuring effective communication between base stations and antennae.
Innovation Solution
A multiplexing apparatus at the base of the cell tower, combined with a low noise amplifier, is used to pass signals in multiple spectral regions between a radio frequency cable and multiple base transceiver stations, reducing the number of cables needed by utilizing band pass filters and a receiver path to amplify and transmit signals across different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio frequency cables are used to connect base stations to antennae, then communication coverage and capacity are improved, but installation cost and wind-loading increase
Solution Approach 1:
The patent combines multiple radio frequency cables into a single cable by using a multiplexer to aggregate signals from multiple base stations. This merging approach maintains communication capacity while reducing the number of physical cables, thereby decreasing wind-loading on the tower.
Solution Approach 2:
The single cable system is designed to handle multiple spectral regions and multiple base station connections simultaneously through the multiplexer and band pass filters. This multi-functional approach allows one cable to perform the work of multiple cables, reducing wind-loading while maintaining communication versatility.
2Adaptability or versatility
If multiple radio frequency cables are installed in cell towers, then base station connectivity is improved, but installation and maintenance cost increase
Solution Approach 1:
The multiplexer combines multiple base station signals into a single cable, reducing the number of cables that need to be installed and maintained. This directly lowers installation and maintenance costs while preserving connectivity to multiple base stations through the filtering and signal separation capabilities.
Solution Approach 2:
The single cable system with multiplexer and band pass filters provides universal connectivity to multiple base stations across different spectral regions. This multi-functional design eliminates the need for separate cables for each base station, reducing overall installation and maintenance expenses.
3Quantity of substance
If band pass filters are used to multiplex signals in a single cable, then cable count is reduced, but signal interference and loss may increase
Solution Approach 1:
The patent employs band pass filters with specific frequency responses tailored to each base station's spectral region. This local optimization of filter characteristics ensures that each signal passes through with minimal attenuation and interference, maintaining signal quality while using a single cable.
Solution Approach 2:
The multiplexer acts as an intermediary device that manages signal aggregation and separation. It coordinates with the band pass filters to ensure clean signal transmission, preventing interference while reducing cable count. The low noise amplifier further mediates signal strength to compensate for any losses.
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 solution effectively reduces the number of radio frequency cables required, lowering installation and maintenance costs while maintaining efficient communication across various spectral regions, thereby addressing the wind-loading and cost issues associated with multiple cables.
Implementation Method 1
a low noise amplifier operable to amplify signals in a first spectral region
Implementation Method 2
The multiplexing apparatus is configured to pass signals in the first spectral region between the cable and a first-band base transceiver station... and pass signals in a second spectral region between the cable and at least one second-band base transceiver station
Data Source
AI summary
A system for transceiving radio frequency signals is provided. The system includes a multiplexing apparatus at a base of a tower and communicatively coupled to a cable, and a low noise amplifier at the base of the tower. The multiplexing apparatus includes a transmitter path, a portion of a receiver path, and a transceiver path portion. The low noise amplifier is operable to amplify signals in a first spectral region and is communicatively coupled to the multiplexing apparatus. The multiplexing apparatus is configured to pass signals in the first spectral region between the cable and a first-band base transceiver station via the low noise amplifier. The multiplexing apparatus is further configured to pass signals in a second spectral region between the cable and at least one second-band base transceiver station.