Ground observation post ultrashort wave over-the-horizon information transmission equipment and transmission method

Abstract

Disclosed is an ultrashort-wave over-the-horizon information transmission device for a ground observation post, which includes a surface control unit, a channel unit, a baseband unit, a power amplifier unit, a power supply unit, a motherboard unit, a filter unit, and an antenna. Also provided is a ground observation post ultrashort wave over-the-horizon information transmission method. In terms of transmission method, the present invention aims at the characteristics of large transmission loss, weak scattering signal and multipath effect in tropospheric scatter propagation, by improving link gain, reducing receiver noise figure, compensating link transmission loss to the greatest extent and weak signal processing Technology to achieve beyond-line-of-sight communication capabilities. The device of the present invention has the advantages of stable all-weather transmission performance, light weight, convenient portability, simple operation, etc., and can greatly increase the communication range between individual soldiers, vehicles, and command nodes, and can greatly improve the communication range under complex terrain. Short distance communication effect.

Description

technical field [0001] The invention relates to the field of ultrashort wave-based wireless communication, in particular to a ground observation post ultrashort wave over-the-horizon information transmission device and a transmission method. Background technique [0002] The wavelength of ultrashort wave is between 1 and 10 meters, the frequency is 30 to 300MHz, and the bandwidth is 10 times that of short wave. It has high stability and is less affected by seasonal and day-night changes. Ultrashort wave communication equipment generally consists of a transmitter, receiver, antenna and power supply. With the development and progress of microelectronics technology, ultrashort wave communication equipment is developing towards smaller volume, lighter weight, and higher integration. First, the communication stability is improved by using frequency synthesizer and digital storage technology; second, the transmission power can be increased by using synthetic radio frequency power;...

AI Technical Summary

Problems solved by technology

[0004] Ultra-short wave trans-horizon transmission mainly relies on the refraction and scattering of electromagnetic waves by the troposphere and terrain, and the energy loss of the transmission signal is large, especially in bad weather conditions, the loss is even more serious

In addition, there is multi-path interference in the received signal, which is manifested as noise in the device, and the signal-to-noise ratio of the received signal is low, so there are many challenges in realizing trans-horizon transmission

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