Offshore floating communication relay system and communication method based on distributed reception

Abstract

The invention discloses an offshore floating communication relay system based on distributed reception and a communication method thereof, which integrates various communication systems such as underwater acoustic communication and electromagnetic wave communication, and can receive data sent back from above-water or underwater observation platforms and It is forwarded to the land server to provide a low-power wide-area high-reliability maritime communication relay system. The system structure includes: mechanical subsystem, communication subsystem, and power supply subsystem. The distributed receiving antenna is installed in the antenna bracket on the upper part of the floating body, and is connected to the data processing and control module through the antenna feeder line arranged inside the main support bracket, and A miniaturized hydrophone is installed at the bottom of the floating body to receive underwater acoustic signals. In the decoding scheme of the data processing and control module, a soft decoding scheme based on multi-channel distributed transparent hard decision reception is adopted, which can effectively combat Rayleigh fading and multipath effects in maritime wireless communication, and reduce packet loss rate and data error. code rate.

Description

technical field [0001] The invention relates to the technical field of ocean observation information communication, in particular to a distributed reception-based maritime floating communication relay system capable of long-distance transmission. Background technique [0002] With the advancement of our national marine development strategy, marine economic activities have increased, and the demand for exploration of the ocean and monitoring of the marine ecological environment has increased. The deep sea mainly communicates through satellites, and the near coast mainly communicates through commercial cellular networks. However, the traditional offshore floating platforms still face many problems in the process of ocean observation, for example: (1) Satellite communication is expensive, and the cost of use is high, making it difficult to deploy and apply on a large scale. (2) Cellular network communication is subject to the specific electromagnetic environment of the ocean, ...

AI Technical Summary

Problems solved by technology

In addition, floating communication platforms are mostly powered by batteries, and the transmission power is limited, which limits the transmission distance of electromagnetic waves.

(3) The communication system is single, and multiple platforms cannot be effectively networked to achieve joint observation of specific sea areas

[0005] At present, most maritime wireless communication platforms adopt the form of sending and receiving with a single communication antenna, and the signals at the receiving end have the disadvantages of high packet loss rate and poor transmission performance.

In the solution to improve transmission quality by adding channel coding, channel coding can detect and correct some errors, but the improvement performance is limited when fading and multipath are severe

Images