Satellite Ranging Power Level Determination via Frequency Segmentation
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Solution Overview
Problem
Existing satellite communication systems face inefficiencies in determining frequency-specific interference floors due to terminal-specific perturbations and varying noise levels, leading to time-consuming and resource-intensive multi-frequency ranging processes.
Innovation Solution
An optimized linear estimator model is implemented, using a processor to aggregate ranging data from multiple terminals, determining power levels for each frequency, and broadcasting interference floor variations to reduce the need for multi-frequency ranging, with the model accounting for terminal-specific offsets and weather conditions through weighted least squares estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spectral density is assumed to be flat across all inroute frequencies, then the ranging procedure becomes simpler and faster, but the accuracy of power level determination deteriorates due to varying noise and interference levels at different frequencies
Solution Approach 1:
The patent segments the frequency spectrum into multiple inroute frequencies and performs ranging separately at each frequency. The processor determines power levels and interference floors individually for each frequency based on ranging data collected at that specific frequency, rather than assuming a flat spectral density across all frequencies. This segmentation allows accurate capture of frequency-specific noise and interference variations while maintaining systematic efficiency through automated processing.
2Measurement precision
If multi-frequency ranging is performed to account for varying interference floors, then the accuracy of power level determination improves, but the time and system resources required increase significantly
Solution Approach 1:
The patent merges ranging operations across multiple frequencies by having the processor aggregate ranging data from multiple terminals and multiple frequencies simultaneously. The processor determines power levels for each frequency by combining and analyzing the collected ranging data in an integrated manner, which reduces redundant operations and optimizes resource utilization while maintaining accurate frequency-specific interference floor estimation.
Solution Approach 2:
The patent changes the approach from assuming a constant flat spectral density parameter to dynamically determining frequency-specific power levels and interference floors based on actual ranging data. The processor adjusts the spectral density parameter for each frequency based on measured noise and interference levels, allowing accurate adaptation to varying conditions without requiring exhaustive multi-frequency ranging at full system capacity.
3Reliability
If terminal-specific perturbations are accounted for in ranging data, then the reliability of power level determination improves, but the complexity of the estimation process increases
Solution Approach 1:
The patent extracts and separates terminal-specific perturbations from the ranging data through the processor's analysis. By identifying and isolating terminal-specific effects from the overall ranging measurements, the system can determine accurate frequency-specific power levels and interference floors while compensating for individual terminal variations. This extraction approach maintains reliability by accounting for terminal differences without requiring a fully complex custom model for each terminal.
Data Source
AI summary
A telecommunications system includes a plurality of ranging terminals programmed to communicate with a plurality of satellites over a plurality of frequencies. A processor, having a memory, is programmed to receive ranging data from each of the plurality of ranging terminals, determine a plurality of power levels for each of the plurality of terminals, and transmit the plurality of power levels to each of the plurality of ranging terminals. Each power level is associated with one of the plurality of frequencies. The plurality of ranging terminals is programmed to transmit signals to the plurality of satellites over the plurality of frequencies in accordance with the power levels determined by the processor.