Distributed receiving-based maritime floating type communication relay system and communication method thereof

Abstract

The invention discloses a maritime floating type communication relay system based on distributed receiving and a communication method of the maritime floating type communication relay system. Variouscommunication systems such as underwater acoustic communication and electromagnetic wave communication are fused. Data returned by an overwater or underwater observation platform can be received and forwarded to an onshore server. The offshore communication relay system is low in power consumption, wide in area and high in reliability. The system structurally comprises a mechanical subsystem, a communication subsystem and a power supply subsystem. A distributed receiving antenna is installed in an antenna support on the upper portion of a floating body and connected with a data processing andcontrol module through an antenna feeder arranged in a main supporting support. A miniaturized hydrophone is installed at the bottom of the floating body to receive underwater acoustic signals. A softdecoding scheme based on multipath distributed transparent hard decision reception is adopted in a decoding scheme of the data processing and control module, so that Rayleigh fading and multipath effects in offshore wireless communication can be effectively resisted. The packet loss rate and the data error rate are reduced.

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, ...

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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

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