Satellite Terminal Transmit Power Control for Nonlinear Distortion
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Solution Overview
Problem
Existing methods for optimizing terminal transmit power in satellite communication systems are costly, require human intervention, and fail to dynamically adjust power levels to avoid non-linear distortion and interference, especially in systems with varying modulation and coding schemes.
Innovation Solution
A method for dynamically adjusting terminal transmit power by determining metrics of non-linear distortion and other impairments in received signals, allowing for optimized power settings that minimize interference and maximize signal-to-noise ratio without human intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminal transmit power is increased to maximize signal-to-noise ratio, then communication efficiency is improved, but non-linear distortion and interference to adjacent carriers increase
Solution Approach 1:
The patent implements dynamic transmit power adjustment by continuously monitoring link quality metrics (SNR, carrier-to-distortion ratio) and adapting power levels in real-time. The system transitions from static power settings to dynamic control, allowing the terminal to adjust its transmit power based on current channel conditions, modulation scheme, and coding rate to maximize communication efficiency while minimizing non-linear distortion.
Solution Approach 2:
The patent establishes a feedback mechanism where the hub monitors link quality metrics including signal-to-noise ratio and carrier-to-distortion ratio, then feeds this information back to the terminal. Based on this feedback, the terminal adjusts its transmit power to maintain optimal performance. The feedback loop enables continuous optimization of the power level to balance communication efficiency and distortion generation.
2Productivity
If terminal transmit power is increased to maximize signal-to-noise ratio, then communication efficiency is improved, but interference to adjacent carriers increases
Solution Approach 1:
The system dynamically adjusts transmit power based on real-time monitoring of interference levels and link quality. When the hub detects that increasing power would cause excessive interference to adjacent carriers or degrade overall system performance, it reduces the power level accordingly. This dynamic adaptation allows the system to maximize communication efficiency while preventing interference problems.
Solution Approach 2:
The hub monitors system-wide link quality metrics and feeds this information back to terminals, enabling them to adjust their power levels to avoid interfering with adjacent carriers. The feedback mechanism includes information about carrier-to-distortion ratio and overall link conditions, allowing terminals to optimize their power settings in the context of the entire system's interference landscape.
3Device complexity
If fixed power levels are used for all terminals, then system complexity is reduced, but adaptability to varying link conditions deteriorates
Solution Approach 1:
The patent implements local quality control by allowing each terminal to have its own optimized power level based on its specific link conditions, rather than using a uniform power setting for all terminals. Each terminal adjusts its power independently based on its signal-to-noise ratio, carrier-to-distortion ratio, and channel conditions. This approach increases adaptability while keeping individual terminal control simple.
Solution Approach 2:
The system changes the power parameter dynamically based on link conditions, modulation scheme, and coding rate. Instead of fixed power levels, the system adapts the power parameter in response to changing conditions. The hub monitors link quality metrics and adjusts power levels accordingly, allowing the system to maintain optimal performance across varying conditions without requiring complex manual intervention.
4Manufacturing precision
If manual calibration methods are used to optimize transmit power, then manufacturing precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent implements self-service power optimization where the terminal automatically adjusts its own power level based on feedback from the hub. Instead of requiring manual calibration or expert intervention, the system performs self-calibration using automated monitoring of link quality metrics. The terminal independently optimizes its power setting based on real-time feedback, eliminating the need for manual operation while maintaining precision.
Solution Approach 2:
The system uses feedback mechanisms to automatically optimize power levels without manual intervention. The hub continuously monitors link quality including signal-to-noise ratio and carrier-to-distortion ratio, and feeds this information back to the terminal, which then automatically adjusts its power level. This automated feedback loop replaces manual calibration processes, making the system easier to operate while maintaining precise power optimization.
Data Source
AI summary
A method for adjusting transmit power of a terminal transmitter on a return link between the terminal transmitter and a receiver. The method includes: a) determining on a version of at least one data burst signal comprised in the receive signal, and a first metric is indicative of the amount of non-linear distortion with which the version of the at least one data burst signal is impaired; b) determining on at least a part of the receive signal a second metric indicative of at least one impairment other than the amount of non-linear distortion; c) determining an updated transmit power value for a next data burst signal to be sent from the first terminal transmitter, thereby taking into account the first and second metric.