Broadcast Channel Distribution via Digital Multiplexing
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Solution Overview
Problem
There is a growing need for an agile system capable of efficiently distributing analog broadcast QAM channels, which current communication networks, such as CCAP and edge QAM systems, struggle to manage effectively due to the requirement for multiple radio frequency ports and varying channel processing needs.
Innovation Solution
A distribution system comprising multiple radio frequency outputs, channel processing units, and digital upconversion units, coupled with digital to analog converters, that generate and convert digital multiplexes into analog multiplexes for efficient transmission across multiple radio frequency outputs, incorporating QAM modulators and routers for frequency allocation and channel processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio frequency ports are used to transmit both narrowcast and broadcast QAM channels, then channel distribution capability is improved, but system complexity increases
Solution Approach 1:
The system divides channel processing into separate units: narrowcast channel processing units and broadcast channel processing units. Each unit handles specific channel types independently, then merges them at the radio frequency output stage. This segmentation allows flexible configuration of processing units while maintaining efficient distribution across multiple ports.
Solution Approach 2:
The digital up conversion units and digital to analog converters serve multiple functions: they process both narrowcast and broadcast channels, and can be configured to output to different radio frequency ports. This multi-functionality reduces the need for separate dedicated processing paths for each channel type.
2Productivity
If analog broadcast QAM channels are distributed to multiple ports, then content delivery efficiency is improved, but processing requirements increase
Solution Approach 1:
The system performs digital up conversion and analog conversion of broadcast channels before distribution to multiple radio frequency ports. This preliminary processing at the digital domain allows efficient replication and distribution of channel content without requiring complex analog signal processing at each individual port.
Solution Approach 2:
Multiple broadcast channels are combined into a single digital multiplex signal before being converted to analog and distributed to multiple ports. This merging approach reduces the number of separate processing paths required while maintaining efficient content delivery to all ports.
3Reliability
If digital multiplexes are converted to analog multiplexes for transmission, then signal compatibility is improved, but conversion complexity increases
Solution Approach 1:
The digital to analog converters serve as intermediary components that bridge the digital processing domain and the analog transmission domain. These standardized converter units simplify the overall system architecture by providing a clear interface between digital multiplex generation and analog signal distribution.
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
Enables efficient distribution of digital broadcast channels across multiple radio frequency outputs, supporting both narrowband and broadcast channels, improving the agility and efficiency of content delivery in communication networks.
Implementation Method 1
a set of digital to analog converters coupled between the group of channel processing and digital up conversion units and the multiple radio frequency outputs... The set of digital to analog converters is arranged to convert the multiple digital multiplexes to provide multiple analog multiplexes
Implementation Method 2
Edge QAM (quadrature amplitude modulation) systems, such as the NSGTM 9000-40G HectoQAM® by Harmonic, Inc.
Data Source
AI summary
A distribution system that may include multiple radio frequency outputs, a group of channel processing and digital up conversion units, and a set of digital to analog converters. The set of digital to analog converters is coupled between the group of channel processing and digital up conversion units and the multiple radio frequency outputs. The group of channel processing units may be arranged to generate multiple digital multiplexes and to provide the multiple digital multiplexes to the set of digital to analog converters. Each digital multiplex comprises digital broadcast channels provided from at least two channel processing and digital up conversion units. The set of the digital to analog converters may be arranged to convert the multiple digital multiplexes to provide multiple analog multiplexes and to provide the multiple analog multiplexes to the multiple radio frequency outputs.