Broadcast Satellite Single Wire Interface Design
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Solution Overview
Problem
Current satellite broadcasting systems are inefficient in delivering multiple channels over a single wire interface, lacking a practical all-digital implementation for demultiplexing, multiplexing, and direct digital demodulation, which limits channel distribution and increases wired bandwidth requirements.
Innovation Solution
A computationally efficient design incorporating high-speed analog-to-digital converters and digital signal processing techniques for direct sampling and processing of downconverted satellite signals, allowing all-digital demultiplexing and multiplexing, and providing a single wire interface with adjustable sampling frequency and In-phase/Quadrature phase near-baseband outputs for networked distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple feedhorns and multiswitch are used to deliver multiple channels, then channel distribution capability is improved, but device complexity and wired bandwidth requirements increase
Solution Approach 1:
The patent merges multiple channel signals into a single wire interface by combining multiple LNB outputs and feedhorns into one integrated system. The single wire interface consolidates what previously required multiple separate connections, reducing device complexity while maintaining the ability to distribute multiple channels to multiple IRDs
Solution Approach 2:
The single wire interface is designed to perform multiple functions simultaneously - it can deliver multiple channels, support multiple IRDs, and provide both audio and video signals through one physical interface. This multi-functional design eliminates the need for separate dedicated interfaces for each function
2Productivity
If traditional analog demultiplexing is used, then implementation simplicity is maintained, but processing efficiency and channel capacity are limited
Solution Approach 1:
The patent replaces traditional analog demultiplexing mechanisms with digital signal processing techniques. Instead of using analog switching and mechanical feedhorns, the system uses digital filters, modulators, and demodulators to separate and process channels, achieving higher processing efficiency and channel capacity
Solution Approach 2:
The system changes the operating parameters by using high-speed A/D converters that can sample at rates sufficient to capture multiple channels simultaneously. By adjusting sampling frequency and using digital signal processing, the system efficiently handles multiple channels through a single wire interface
3Adaptability or versatility
If additional channels are broadcast to viewers, then service versatility is improved, but wired bandwidth requirements increase
Solution Approach 1:
The patent transitions from a one-dimensional analog signal transmission to a multi-dimensional digital signal transmission. By converting signals to digital format and using multiple sampling rates and processing dimensions, the system can pack more channels into the same bandwidth, increasing service versatility without proportionally increasing wired bandwidth requirements
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 enables the distribution of more channels within the same bandwidth, supports additional IRDs with reduced wired bandwidth, offers cost-effective integration of IRD front-end functionality, and provides flexibility for future system designs with a smaller footprint and simplified interfaces.
Implementation Method 1
a low noise block amplifier module having multiple outputs
Implementation Method 2
a plurality of filter banks, each filter bank coupled to each of the outputs of the low noise block amplifier module in a respective fashion and comprising a plurality of filters
Implementation Method 3
a plurality of analog-to-digital (A/D) converters, each A/D converter coupled to a filter in the plurality of filters in the plurality of filter banks in a respective fashion, wherein the A/D converters directly sample incoming downconverted broadcast satellite signals
Data Source
AI summary
A broadcast satellite single wire interface comprises a low noise block amplifier module having multiple outputs, a plurality of filter banks, each filter bank coupled to each of the outputs of the low noise block amplifier module in a respective fashion and comprising a plurality of filters, and a plurality of analog-to-digital (A/D) converters, each A/D converter coupled to a filter in the plurality of filters in the plurality of filter banks in a respective fashion, wherein the A/D converters directly sample incoming downconverted broadcast satellite signals and the sampled incoming downconverted broadcast signals are output on a single wire in a stacked output.