Signal Processing for High-Altitude Wireless Communication
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Solution Overview
Problem
Wireless communication devices operating at high altitudes experience significant propagation loss, leading to degraded communication quality when collecting data from the ground, particularly in IoT applications where signal strength and coverage are compromised.
Innovation Solution
A signal processing device and method that utilize multiple antennas on a wireless communication device moving in a predetermined orbit above a celestial body to acquire and synthesize signals, determining synthesis parameters based on the position of a transmission terminal and orbit data to enhance communication quality by compensating for propagation loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the wireless communication device operates at high altitude, then the coverage area is expanded, but the propagation loss increases and communication quality deteriorates
Solution Approach 1:
The patent combines signals received by multiple antennas through synthesis processing to create a composite signal with improved strength and quality. This merging of multiple signal paths compensates for the propagation loss inherent in high-altitude operation, allowing the system to maintain communication quality while achieving expanded coverage area.
Solution Approach 2:
The patent dynamically adjusts synthesis parameters based on the relative position between the wireless communication device and the transmission terminal. By changing parameters such as synthesis weights and beamforming coefficients according to positional information, the system optimizes signal quality for varying propagation conditions at different altitudes and locations.
2Reliability
If multiple antennas are used for signal acquisition, then the signal synthesis capability is improved, but the device complexity increases
Solution Approach 1:
The patent performs preliminary determination of synthesis parameters based on pre-acquired position information of the transmission terminal and the wireless communication device. By calculating and preparing synthesis parameters in advance before actual signal synthesis, the system reduces the computational complexity during real-time operation while maintaining high signal synthesis capability.
Solution Approach 2:
The patent introduces position information as an intermediary element that links the multiple antenna signals to the synthesis process. This intermediary parameter enables the system to coordinate multiple antenna outputs effectively without requiring complex real-time interactions between all antenna elements, thereby simplifying the overall device architecture.
Data Source
AI summary
An acquisition unit acquires a plurality of signals received by a plurality of antennas included in a wireless communication device that moves in a predetermined orbit above a celestial body. A parameter determination unit determines a synthesis parameter of the plurality of signals according to the position of a transmission terminal provided on the celestial body, the orbit, and the reception time of the plurality of signals. A synthesis unit synthesizes a transmission signal of the transmission terminal according to the plurality of signals and the synthesis parameter.