Modular Digital Channelizer for Satellite Beam Management
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Solution Overview
Problem
Designing digital telecommunications payloads for satellite communication systems that maximize on-orbit flexibility while minimizing costs, mass, power, and size is a challenging task, especially for providing high data rate communication services to underserved areas.
Innovation Solution
A modular digital channelizer system that allows for flexible assignment of receive and transmit beams using digital beamforming, incorporating a programmable digital channelizer that routes data among multiple receive and transmit modules, enabling time-domain beam hopping and reconfigurable switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital beamforming and reconfigurable switching are implemented to maximize on-orbit flexibility, then adaptability is improved, but device complexity increases
Solution Approach 1:
The digital payload is divided into multiple functional modules including receive modules, transmit modules, and switching modules. Each module can be independently configured and reconfigured, allowing flexibility without requiring complete system redesign. The channelizer is segmented into multiple channels that can be independently managed.
Solution Approach 2:
The system implements dynamic reconfigurable switching that allows beam assignments and signal routing to be changed during satellite operation. The switching modules can dynamically adjust beam hopping patterns and reassign frequency channels based on real-time communication demands, maximizing on-orbit adaptability.
2Productivity
If modular channelizer with multiple receive and transmit modules is used to provide high data rate services, then productivity is improved, but device complexity increases
Solution Approach 1:
The switching modules serve multiple functions simultaneously: they perform beam switching, frequency channel assignment, and signal routing operations. The same modular architecture handles both receive and transmit paths, reducing the need for separate dedicated hardware for each function and managing complexity while maintaining high data rates.
3Adaptability or versatility
If time-domain beam hopping and reconfigurable switching are implemented, then adaptability is improved, but use of energy increases
Solution Approach 1:
The system implements periodic beam hopping where satellites switch between predetermined beams in a cyclic pattern. This periodic operation allows the system to maintain adaptability and coverage flexibility while managing power consumption through regular, predictable switching cycles rather than continuous random switching.
Data Source
AI summary
An example of a channelizer includes a plurality of receiver circuits, an individual receiver circuit including a frequency demultiplexer that is configured to demultiplex a plurality of subchannels and a time-division demultiplexer coupled to the frequency demultiplexer, the time-division demultiplexer configured to time-division demultiplex the plurality of subchannels to provide a plurality of time-division outputs, an individual time-division output including portions of data from each of the plurality of subchannels; and a plurality of switch circuits, each configured to receive a different time-division output of the plurality of time-division outputs from the individual receiver.