Mountain dense forest emergency rescue communication system and waveform design method based on unmanned aerial vehicle

Abstract

The invention discloses a mountain dense forest emergency rescue communication system and waveform design method based on an unmanned aerial vehicle, and the method comprises the following steps: S1, enabling a prototype filter with good time-frequency focusing performance to be the most core content of an FBMC system, and designing a 20-order Hermite filter function with good time-frequency focusing performance; s2, in mathematical simulation software, generating an input data symbol for cutting the DFT extended coding matrix; s3, after the input data of the tailored DFT extended coding algorithm is obtained in the step S2, a transmitting signal of a transmitting end is calculated; s4, after the transmitting signal of the transmitting end is obtained in the step S3, the peak-to-average ratio (PAPR) of the signal is calculated; and S5, introducing a channel model of the dense mountain forest, and introducing the transmitted signal into the channel model of the dense mountain forest for processing. According to the mountainous region dense forest emergency rescue communication system based on the unmanned aerial vehicle and the waveform design method, subcarrier parameters can be flexibly configured, and the broadband transmission effect is achieved; and the problem of multipath severity in the mountain dense forest environment can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of mobile communication for emergency rescue, in particular to a communication system and waveform design method for emergency rescue in mountain jungles based on unmanned aerial vehicles. Background technique [0002] In recent years, major natural disasters such as earthquakes, forest fires, and mudslides have occurred frequently, and the occurrence of natural disasters usually causes the loss of emergency communication capabilities at the accident site, resulting in interruption of emergency communication, which poses a serious threat to people's lives and property safety. . For example, the forest fire caused by the lightning strike in Muli County, Liangshan, Sichuan in 2019, the ignition point was about 3,800 meters above sea level. The terrain was very complex, the slopes were steep and the valleys were deep, and the fire scene was high in mountains and dense forests. The firefighters were affected by ...

AI Technical Summary

Problems solved by technology

For example, in 2019, the forest fire caused by lightning strikes in Muli County, Liangshan, Sichuan. The fire point was at an altitude of about 3,800 meters. The terrain was very complex, with steep slopes and deep valleys. , suddenly encountered a mountain fire detonation, resulting in interruption of communication, dozens of firefighters lost contact, resulting in unnecessary huge casualties

Therefore, in order to solve the problems of severe multipath, poor signal coverage, lack of broadband channel model, and limited power of emergency rescue terminals in mountainous and dense forest environments, a high-reliability, high-power amplifier, and high-efficiency multi-carrier signal enhancement technology for mountainous and dense forests is urgently needed. Improve signal penetration, increase communication distance under limited transmission power, and solve communication problems for emergency rescue in mountainous and dense forest environments

Images