Channel Stacking System With Frequency Translation
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Solution Overview
Problem
Existing multiple dwelling channel stacking systems face challenges in providing a high number of user bands while minimizing design complexity, power consumption, and user band allocation issues, and ensuring privacy and fair distribution of user bands among multiple users.
Innovation Solution
A channel stacking system with multiple CSS output connectors, a CSS module generating multiple user bands, and a CSS output interface that couples CSS module outputs to subsets of output connectors with frequency translation, allowing fair distribution and reduced propagation of user band allocation issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single CSS module output is coupled to multiple CSS output connectors without frequency translation, then the system complexity is reduced and power consumption is minimized, but the number of user bands that can be provided is limited and user band allocation issues propagate across all connected receivers
Solution Approach 1:
The CSS module output signal is segmented into multiple frequency subsets, with each subset being frequency-translated to a different frequency range before being coupled to a separate CSS output connector. This allows each connector to serve independent groups of receivers with dedicated user bands, increasing system versatility while maintaining manageable complexity through modular frequency management
Solution Approach 2:
The system transitions from a single-frequency-dimension approach to a multi-frequency-dimension approach by applying frequency translation to create multiple distinct frequency ranges from a single CSS module output. This dimensional expansion in the frequency domain enables multiple independent user band allocations without requiring multiple CSS module outputs, thus increasing adaptability while controlling complexity
2Adaptability or versatility
If frequency translation is applied to all CSS output connectors, then user band allocation privacy is improved and fair distribution is achieved, but power consumption and device complexity increase
Solution Approach 1:
Frequency translation is applied selectively rather than uniformly across all CSS output connectors. The system applies frequency translation only to specific connectors based on local requirements for user band isolation and privacy, while other connectors maintain direct coupling to the CSS module output. This localized application of frequency translation achieves the necessary privacy and fair distribution benefits while minimizing overall power consumption and complexity
3Adaptability or versatility
If multiple CSS module outputs are used to serve multiple CSS output connectors, then the number of user bands increases and user band allocation issues are isolated, but design complexity and power consumption increase
Solution Approach 1:
A single CSS module output is designed to serve multiple CSS output connectors through the application of frequency translation. The CSS module output signal is processed to create multiple frequency subsets that can be distributed to different connectors, making the single CSS module output multi-functional. This approach increases the number of available user bands and isolates allocation issues while avoiding the need for multiple CSS module outputs, thus controlling design complexity
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
The system effectively provides a high number of user bands to multiple users with reduced power consumption, design complexity, and increased privacy, ensuring fair distribution and minimizing unallowable share of user bands.
Implementation Method 1
a second interface circuit coupled to the single CSS module output, the second interface circuit including a frequency translation module configured to frequency translate a subset of the user bands from the CSS module output signal
Data Source
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AI summary
A CSS module (100) and a CSS output interface (500) of the channel stacking system are operated such that each of the CSS output connector signals (200) comprises a respective subset (220) of user bands (110) of a corresponding CSS module output signal (400). A first CSS output connector (20.A) is coupled without frequency translation to the CSS output interface (500), and at least one further CSS output connector (20.B) is coupled to the CSS module (100) via a frequency translation module (510).