A short-wave/ultra-short-wave radio station long-distance relay communication system and method

Abstract

The invention discloses a short-wave / ultrashort-wave station long-distance relay communication system and method. The system includes a main station, a relay station and N subordinate stations, N≤20; the subordinate stations are distributed around the relay station, and the main station and There are obstacles between the relay stations, and there is no obstacle between the repeater station and the subordinate station; the main station and the repeater station send and receive information through the short-wave antenna, and the repeater station and the subordinate station send and receive information through the ultra-short-wave antenna , direct information transmission between stations; the present invention combines short-wave and ultra-short-wave communication methods, which not only exerts the advantages of short-wave communication in long-distance transmission, but also exerts the advantages of ultra-short-wave anti-interference ability, which can effectively guarantee The ultra-long-distance transmission problem in the medium, and has a strong invulnerability at the same time.

Description

technical field [0001] The invention belongs to the technical field of wireless relay communication, and in particular relates to a short-wave / ultrashort-wave station long-distance relay communication system and method. Background technique [0002] With the continuous development of communication technology, the military's demand for radio stations is also increasing. The existing military communication systems are generally short wave (frequency range 3-30MHz), ultrashort wave (frequency range 30-300MHz), satellite communication, etc. The main propagation path of shortwave is sky wave. After the shortwave signal is sent by the antenna, it is reflected back to the ground by the ionosphere, and then reflected back to the ionosphere by the ground. It can be reflected many times, so the propagation distance is very far, and it is not blocked by ground obstacles. However, in the process of sky-wave propagation, factors such as time delay, atmospheric noise, and multipath effec...

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Problems solved by technology

Since all links in satellite communication are wireless links, and the position of the satellite may be constantly changing, the control system is also relatively complicated

After the wireless communication technology has been widely used in society, the electromagnetic environment has shown increasingly complex characteristics, and the communication environment has changed. At present, any communication technology cannot meet the requirements of strong anti-interference ability and long-distance communication.

[0004] The existing technology can no longer meet the actual needs of communication when performing long-distance transmission in a complex electromagnetic environment

During the propagation process of short-wave communication, it is easily affected by factors such as day and night, season, climate, etc., with poor stability and high noise

Ultrashort wave communication is greatly affected by terrain, buildings, and jungle areas, and will be blocked or absorbed by these interference factors, causing difficulties for ultrashort wave communication

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