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A uuv mobile underwater acoustic communication technology based on vector hydrophone array

A technology of vector hydrophone and underwater acoustic communication, which is applied in the direction of measuring vibration, instruments, measuring devices, etc., to achieve the effect of fast communication rate, small size, and improved signal-to-noise ratio.

Active Publication Date: 2022-01-14
HARBIN ENG UNIV
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Problems solved by technology

Yu Hua studied the parameter estimation method of delay-Doppler dual spread channel based on fractional Fourier transform, but this method needs to cooperate with matched filter to complete the measurement of multipath delay in underwater acoustic channel

Method used

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  • A uuv mobile underwater acoustic communication technology based on vector hydrophone array
  • A uuv mobile underwater acoustic communication technology based on vector hydrophone array
  • A uuv mobile underwater acoustic communication technology based on vector hydrophone array

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Embodiment Construction

[0034] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0035] figure 1 It is a flow chart of the communication method. This technology can realize robust underwater acoustic communication between UUVs under the condition of movement. The vector hydrophone receiving array is installed between the bow and the tail of the UUV, with a total of 4 array elements.

[0036] 1. Vector multi-channel decision feedback equalization technology:

[0037] The present invention proposes a multi-channel decision feedback equalizer (VM-DFE) based on a vector hydrophone, and its principle block diagram is as follows figure 2 As shown, it mainly includes two parts: one is the vector signal processing part, which suppresses the interference in the undesired direction through vector combination and improves the signal-to-noise ratio of the input signal; the other is the multi-channel decision feedback equalization part, ...

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Abstract

The invention discloses a UUV mobile underwater acoustic communication technology based on a vector hydrophone array, which belongs to the technical field of underwater mobile communication. (1) A vector multi-channel decision feedback equalizer is proposed, which mainly includes two parts: i. The vector signal processing part suppresses the interference in the undesired direction through vector combination and improves the signal-to-noise ratio of the input signal; ii. The multi-channel decision The feedback equalization part suppresses the inter-symbol interference caused by the multi-channel expansion of the underwater acoustic channel by adjusting the coefficients of the forward filter and the feedback filter. (2) On this basis, in view of the complex Doppler effect generated in the UUV mobile communication process, an underwater acoustic channel delay-Doppler function estimation method based on fractional Fourier transform is proposed. Sampling techniques suppress Doppler-generated signal distortions. The fractional Fourier transform can achieve accurate Doppler estimation, and the vector multi-channel decision feedback equalizer achieves robust communication performance and significantly reduces the bit error rate.

Description

technical field [0001] The invention belongs to the technical field of underwater mobile communication, and in particular relates to a UUV mobile underwater acoustic communication technology based on a vector hydrophone array. Background technique [0002] Although satellite remote sensing can obtain a large amount of ocean observation data, it cannot go deep below the sea surface. In order to perceive the temporal and spatial changes inside the ocean, various ocean observation technologies such as unmanned underwater vehicle (UUV) have been developed rapidly. UUV can be equipped with a variety of sensors to obtain underwater environmental data, and transmit the data back to the surface mother ship through underwater acoustic communication technology. However, the underwater acoustic channel is considered to be the most difficult wireless communication channel. In order to overcome the severe multi-path extension and fast fading of the underwater acoustic channel, it is usu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H3/00
CPCG01H3/00
Inventor 韩笑李林殷敬伟郭龙祥生雪莉
Owner HARBIN ENG UNIV
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