Terminal Uplink Power Control for Antenna Motion PSD Compliance

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Solution Overview

Problem

In satellite communications, existing uplink power control systems face challenges in efficiently managing power spectral density (PSD) to avoid interference with neighboring satellites, particularly when antenna motion is involved, as they often rely on hub-based solutions that incur delays and require static power margin settings.

Innovation Solution

Implementing a method for adaptive uplink power control that generates a power margin based on the motion profile of satellite terminal antennas, allowing for dynamic and scalable power adjustments at the terminal level, reducing the need for PSD table updates and enabling more efficient power utilization by accounting for current and historical motion data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If hub-based power control solutions are used to manage PSD and avoid interference with neighboring satellites, then compliance with regulatory PSD limits is achieved, but system delays increase and responsiveness to antenna motion decreases

Engineering Contradiction:

ImprovePSD complianceVSAvoidcontrol delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent extracts the power control functionality from the hub and implements it locally at the terminal. The terminal autonomously generates power margins based on its own motion profile data, eliminating the need for hub-based control loops and reducing control delays while maintaining PSD compliance

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The terminal serves itself by autonomously determining its motion profile, calculating appropriate power margins, and adjusting transmit power without requiring hub intervention. This self-service approach enables real-time adaptation to antenna motion while ensuring regulatory compliance

Inventive Principle:

Principle #25Self-service

2Ease of operation

If static power margin settings are used in uplink power control, then implementation simplicity is maintained, but power utilization efficiency decreases and uplink throughput is limited

Engineering Contradiction:

Improveimplementation simplicityVSAvoiduplink throughput

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent transitions from static power margin settings to dynamic power margins that adapt in real-time based on the terminal's motion profile. The power margin is continuously adjusted according to actual antenna motion characteristics, improving power utilization efficiency and uplink throughput while maintaining operational simplicity through automated calculations

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the power margin parameter from a fixed static value to a dynamic value that varies with motion conditions. By calculating power margins based on actual motion profile data (including current and historical motion), the system optimizes power utilization without increasing operational complexity

Inventive Principle:

Principle #35Parameter changes

3Reliability

If excessive power margins are applied to account for antenna motion, then compliance with PSD limits is ensured, but transmit power is reduced and network capacity decreases

Engineering Contradiction:

ImprovePSD limit complianceVSAvoidtransmit power

Core Design Contradiction:

ReliabilityVSPower

Solution Approach 1:

The patent applies local quality by determining motion-specific power margins tailored to each terminal's actual motion characteristics rather than using uniform conservative margins for all terminals. This allows each terminal to use the minimum necessary power margin for its specific motion profile, maximizing transmit power while ensuring PSD compliance

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system uses feedback from motion profile data (current and historical motion information) to dynamically adjust power margins. This feedback mechanism ensures that power margins are neither excessive nor insufficient, optimizing the balance between PSD compliance and transmit power utilization

Inventive Principle:

Principle #23Feedback

4Reliability

If bandwidth of transmit channels is expanded to avoid PSD mask non-compliance, then regulatory compliance is achieved, but system flexibility decreases when bandwidth is fixed

Engineering Contradiction:

ImprovePSD mask complianceVSAvoidbandwidth flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent performs preliminary action by calculating and applying motion-based power margins before transmit operations begin. This proactive approach ensures PSD compliance is maintained without needing to dynamically adjust bandwidth, which is particularly valuable in systems with fixed bandwidth configurations

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11811489B2Adaptive and learning motion mitigation for uplink power control

Publication Date: 2023.11.07 KYMETA CORP

AI summary

Techniques for motion mitigation for uplink power control are disclosed. In one embodiment, a method for use in a satellite communication system comprises: generating a power margin associated with motion of an antenna of a satellite terminal; and generating a first power limit representing a maximum transmit power for the antenna based, at least in part, on the power margin.