Unmanned aerial vehicle data link communication system based on spread-spectrum communication

Abstract

The invention relates to an unmanned aerial vehicle data link communication system based on spread-spectrum communication. The system comprises an unmanned aerial vehicle, a wireless communication module and a ground station. The unmanned aerial vehicle is provided with a flight control module and a sending / receiving end connected with the flight control module; the sending / receiving end comprisesan MCU and a radio frequency transceiving unit; the radio frequency transceiving unit is an SX1278 chip; and the SX1278 chip adopts a CSS spread-spectrum communication encoding mode. Compared to theprior art, the unmanned aerial vehicle data link communication system has the advantages of high resistance to multi-path interference, high sensitivity, low power consumption, long transmission distance and the like.

Description

technical field [0001] The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle data link communication system based on spread spectrum communication. Background technique [0002] With the advancement of information and communication technology, data links have emerged in the field of drones. The UAV data link generally works in a very complex communication environment, so the data link is required to have the most basic reliability. The design of the data link is a great challenge for both hardware and software design. In the field of civilian unmanned aerial vehicles, the development of data link technology is not as perfect as that used in military applications. It is characterized by multiple and complex technical versions and inconsistent technical standards. [0003] Among them, the data communication link between the UAV and the ground control station is the key link to ensure the normal flight of the UAV ...

AI Technical Summary

Problems solved by technology

Frequency hopping technology is the most widely used in various military and civilian radio stations. Due to its characteristics of rapid carrier frequency hopping, frequency hopping technology can resist tracking and forwarding man-made interference in a "dodge" way, and solve the problem of " Far-near effect" problem, but its anti-multipath interference ability is not strong

The DSSS spread spectrum system has the following disadvantages: (1) The generation of PN (Pseudo-noise code, pseudo-random sequence) sequence is complicated

The disadvantage is that the power consumption is large, the price is relatively expensive, and the transmission distance is relatively short

[0006] 2. Bluetooth: The technical part of Bluetooth wireless transmission adopts FHSS spread spectrum technology, so the transmission speed is relatively slow

Its advantages are low power consumption and self-organizing network. The transmission distance depends on the transmission power, ranging from several hundred to several kilometers, generally 20-30kps, but the price is expensive and the receiving sensitivity is low.

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