Low-Orbit Satellite Beam Constant Offset Spectrum Sharing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Low-orbit communication satellites face challenges in sharing radio spectrum with geosynchronous satellites due to interference issues, requiring complex beam biasing methods that are costly and require high precision, limiting orbit correction and increasing design and operational costs.
Innovation Solution
A method for sharing radio spectrum based on a constant beam bias, where low-orbit communication satellites perform constant beam bias conversions at specific orbital positions, maintaining a uniform overlapping coverage region without high-precision devices, allowing seamless coverage and reduced interference with geosynchronous satellites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If complex beam biasing methods are used to share radio spectrum with geosynchronous satellites, then interference is reduced, but device complexity and cost increase
Solution Approach 1:
The beam biasing operation is segmented into discrete constant bias states rather than continuous adjustment. The patent applies constant beam bias conversions at specific orbital positions (ascending node, descending node, Arctic region, Antarctic region), dividing the orbital cycle into distinct segments where each segment uses a fixed bias angle, simplifying the control system while maintaining interference reduction.
Solution Approach 2:
The patent implements periodic constant beam bias conversions at specific orbital positions throughout the satellite's orbit. The beam bias is adjusted periodically at four key positions (ascending node, descending node, Arctic region, Antarctic region), creating a rhythmic pattern of bias application that simplifies control compared to continuous adjustment while effectively managing interference with geosynchronous satellites.
2Adaptability or versatility
If high-precision beam biasing devices are used, then spectrum sharing is enabled, but manufacturing cost increases
Solution Approach 1:
The patent employs constant beam bias conversions that can be implemented with relatively simple control mechanisms rather than expensive high-precision devices. By using discrete bias angles applied at specific orbital positions, the system achieves spectrum sharing capability without requiring costly high-precision beam control hardware, reducing manufacturing costs while maintaining functionality.
Solution Approach 2:
The patent changes the beam bias parameter discretely at specific orbital positions rather than requiring continuous high-precision adjustment. By applying constant bias conversions at four key positions (ascending node, descending node, Arctic region, Antarctic region), the system achieves spectrum sharing with simpler, more cost-effective control mechanisms that do not require expensive high-precision devices.
3Object-affected harmful factors
If progressive beam bias is applied, then interference is managed, but orbit correction is limited
Solution Approach 1:
The patent segments the beam biasing operation into discrete constant bias applications at specific orbital positions rather than using continuous progressive biasing. This segmentation allows the satellite to perform orbit correction maneuvers between these fixed bias positions without interfering with the beam coverage, thereby maintaining both interference management and orbit correction capabilities.
Solution Approach 2:
The patent applies constant beam bias conversions at predetermined orbital positions (ascending node, descending node, Arctic region, Antarctic region) before the satellite reaches positions where orbit correction may be needed. This preliminary action establishes the beam configuration in advance, allowing subsequent orbit correction operations to be performed without disrupting the beam biasing strategy, thus maintaining versatility.
Data Source
AI summary
Provided are a method for sharing a radio spectrum with high-orbit communication satellites, which comprise a geosynchronous satellite and operate in a near-equatorial orbit, on the basis of a beam constant offset, and a low-orbit communication satellite system. The method comprises: low-orbit communication satellites completing, near the South and North Poles and the equator, the conversion of a transmitting beam constant offset state, wherein before and after each implementation, beam offset directions are the opposite of each other, and the beam offset degree is a fixed constant; the low-orbit communication satellites near the equator all deflect towards the equator; during beam offset conversion near the North and South Poles, services are provided by beams of other low-orbit communication satellites in two other orbits, which are adjacent to each other, at both sides of the current orbit; and during the implementation of beam offset conversion near an ascending node and a descending node, beam coverage services are provided by adjacent low-orbit communication satellites located at the other side of the ascending node or the descending node in the same orbit.