A wake-up signal detection method for underwater acoustic communication nodes based on frame synchronization signal

A technology of frame synchronization signal and wake-up signal, which is applied in the direction of synchronization device, wireless communication, sustainable communication technology, etc., can solve the problems of high complexity of frequency detection method and low reliability of energy detection method, and achieve the effect of reducing energy consumption

Active Publication Date: 2020-07-21
ZHEJIANG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a wake-up signal detection method for underwater acoustic communication nodes based on frame synchronization signals for the shortcomings of low reliability of energy detection methods and high complexity of frequency detection methods.

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  • A wake-up signal detection method for underwater acoustic communication nodes based on frame synchronization signal
  • A wake-up signal detection method for underwater acoustic communication nodes based on frame synchronization signal
  • A wake-up signal detection method for underwater acoustic communication nodes based on frame synchronization signal

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[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] A wake-up signal detection method for underwater acoustic communication nodes based on frame synchronization signals. The system model is as follows: figure 1 As shown, the underwater acoustic communication network node set D={d 1 , d 2 , d 3 , d 4}, there are 3 fixed underwater sensing nodes, and one mobile node is used to collect data, here node d 4 to node d 1 A data collection request is initiated to illustrate the specific working steps of the present invention. Send signal frame structure such as figure 2 As shown, set the signal detection false alarm probability p f =10 -6 , the frame synchronization signal used for detection is an LFM signal, the sweep frequency range is 16-22KHz, the duration T=50ms, and the sampling rate of the low-power duty circuit of the receiving node is f s 50KHz.

[0035] Such as image 3 As shown, the method ...

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Abstract

The invention discloses an underwater acoustic communication node wake-up signal detection method based on a frame synchronization signal. According to an existing method, due to the influence of impulse noise and specific environmental noise, the reliability of a detection result is not high, and the computational complexity of a frequency detection and cross-correlation detection related methodin the long-time underwater detection process is high. The method comprises the following steps: firstly, constructing a corresponding MT signal for each node in a communication network, setting two equal-length sliding windows at a receiving end to realize preliminary energy provider detection, and then performing MT frequency confirmation on the signal detected by the preliminary energy providerby using a Goertzel algorithm to realize reliable signal arrival detection. The method is suitable for an underwater communication network with a plurality of communication nodes, accurate awakeningof a target node is realized through an MT signal, the calculation complexity is low, and the energy consumption of long-time signal detection of the underwater communication network node in a dormantstate can be reduced.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic signal processing, and in particular relates to a method for detecting wake-up signals of underwater acoustic communication nodes based on frame synchronization signals. Background technique [0002] With the development of marine resources and the increasing demand for underwater environment monitoring, underwater observation equipment is continuously deployed, and underwater wireless communication has attracted more and more attention. Acoustic waves are currently the main carrier of underwater wireless information transmission. At the same time, underwater acoustic networks can be flexibly applied to scenarios with different coverage scales, water depths, and network structures. Information exchange between observation devices. [0003] In the actual underwater acoustic communication system, the communication node needs to work for a long time underwater and rely on its own battery...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/02H04W56/00
CPCH04W52/0229H04W56/001Y02D30/70
Inventor 谢磊陈惠芳凌志强
Owner ZHEJIANG UNIV
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