Cable Amplifier Architecture for Full-Duplex Without Diplex Filters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cable television and data networks face limitations in bandwidth and flexibility due to the use of diplex filters, which restrict the use of full duplex technology and require frequent modifications to accommodate changing bandwidth demands.
Innovation Solution
The implementation of a system comprising a first amplifier for conditioning upstream signals, a second amplifier for conditioning downstream signals, and a shaping module to enable bidirectional communication using a full duplex frequency range without diplex filters, allowing for simultaneous or offset bidirectional signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If diplex filters are used to separate forward and return signal paths, then signal direction separation is achieved, but network flexibility and bandwidth are limited
Solution Approach 1:
The patent removes diplex filters from the amplifier system, extracting the frequency separation function from the amplification path. This allows amplifiers to handle both upstream and downstream signals without dedicated filters, enabling full-duplex operation and improving network flexibility while maintaining signal direction separation through alternative means.
Solution Approach 2:
The patent makes amplifiers universal by enabling them to amplify both upstream and downstream signals simultaneously without requiring dedicated diplex filters for each direction. This multi-functionality allows a single amplifier configuration to serve multiple signal paths, enhancing adaptability and bandwidth utilization.
2Reliability
If diplex filters are used to dedicate amplifiers to specific band splits, then signal path separation is maintained, but frequent modifications are required to accommodate changing bandwidth demands
Solution Approach 1:
The patent implements a dynamic system where amplifier configurations can be adjusted without physical filter changes. The system adapts to changing bandwidth demands through reconfigurable amplifier settings rather than requiring manual modification of diplex filters, reducing maintenance frequency and improving ease of operation.
3Adaptability or versatility
If full duplex communication is implemented without diplex filters, then network flexibility and bandwidth are enhanced, but signal conditioning complexity increases
Solution Approach 1:
The patent combines signal conditioning functions into integrated amplifier modules that can handle both upstream and downstream signals. By merging frequency separation and amplification functions into a unified system without diplex filters, the overall device complexity is reduced while maintaining full-duplex capability and enhancing network flexibility.
Data Source
AI summary
A cable network system for bidirectionally communicating signals at an enhanced duplex frequency range, which may be between about 5 MHz and about 650 MHz. This system may include a first amplifier, which may be configured to condition an upstream signal proceeding from a subscriber premises to a headend, without necessarily conditioning a downstream signal proceeding from the headend to the subscriber premises, a second amplifier, which may be configured to condition the downstream signal without necessarily conditioning the upstream signal, and a shaping circuit, which may condition the upstream and downstream signals. This system also may simultaneously, or in an overlapping or offset manner, communicate signals at a full duplex frequency range without a diplex filter.