UAV Communication System Using Dual Frequency Bands
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Solution Overview
Problem
Ensuring stable and secure communication links between unmanned aerial vehicles (UAVs) and ground control systems is crucial for safe operation, as existing systems face challenges in maintaining reliable connections, especially in civilian UAVs where frequency collisions can occur, impacting safety and mission efficiency.
Innovation Solution
A communication system for UAVs that utilizes a preset frequency band for secure communication between the UAV and ground control systems, employing an onboard communication apparatus with dual antennas for improved alignment and reduced interference, ensuring stable uplink and downlink signals through a C-band and 5.1 GHz band respectively, preventing frequency collisions and enhancing transmission speed and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a mobile communications system is used for UAV communication, then device complexity and weight are reduced, but communication reliability and security deteriorate due to frequency collisions and interference
Solution Approach 1:
The communication system is divided into two independent segments: a first communication apparatus using C-band frequency and a second communication apparatus using 5.1 GHz band frequency. This segmentation allows simultaneous operation on different frequency bands, preventing frequency collisions while maintaining simplified device architecture.
Solution Approach 2:
The system transitions from single-frequency-band communication to multi-frequency-band communication by introducing a vertical dimension of frequency diversity. The dual-antenna setup operates on orthogonal frequency bands, eliminating interference through frequency domain separation.
2Weight of moving object
If a single communication apparatus is used, then device weight is reduced, but communication reliability deteriorates due to potential signal interference and lack of redundancy
Solution Approach 1:
Two communication apparatuses are merged into a single integrated communication system with dual antennas. The first antenna communicates via C-band frequency and the second antenna via 5.1 GHz band frequency, combining the benefits of redundancy and frequency diversity while minimizing weight through integrated design.
Solution Approach 2:
The communication system achieves multi-functionality by enabling simultaneous operation on two different frequency bands. The integrated communication apparatus can selectively use C-band for one communication stream and 5.1 GHz band for another, providing both redundancy and interference avoidance in a single device.
3Reliability
If preset frequency bands are used for communication, then frequency collisions are prevented, but available communication bandwidth is limited
Solution Approach 1:
The system resolves the bandwidth limitation by adding a frequency band dimension. Instead of competing for bandwidth within a single frequency band, the system operates simultaneously on two orthogonal frequency bands (C-band and 5.1 GHz), effectively multiplying the available communication capacity.
Data Source
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AI summary
A communication system for an unmanned aerial vehicle according to one embodiment of the present invention comprises: an onboard communication apparatus, mounted on an unmanned aerial vehicle, for communicating by means of a previously configured frequency band; and a ground communication apparatus for communicating with the onboard communication apparatus by means of the previously configured frequency band.