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MIMO sonar system

A sonar and sub-array technology, applied in the field of multi-input and multi-output sonar systems, can solve the problems of reduced sonar range, inability to obtain the gain and directivity of the emission array, and achieve the effect of avoiding complicated processing

Active Publication Date: 2017-01-11
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

For MIMO sonar, if each array element emits different waveforms, the gain and directivity of the transmitting array cannot be obtained, and the sonar range is greatly reduced

Method used

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Embodiment Construction

[0023] The present invention will be further described below through the accompanying drawings and specific embodiments, but it should be understood that these embodiments are only used for more detailed description, and should not be construed as limiting the present invention in any form, that is, not intended To limit the protection scope of the present invention.

[0024] In one embodiment, the present invention provides a MIMO sonar system based on sub-array division, including a transmitting end and a receiving end. figure 2 is a schematic diagram of MIMO sonar or radar based on sub-array division, by figure 2 As shown, the transmitting array at the transmitting end is divided into sub-arrays, the elements of each sub-array transmit the same medium waveform, and each sub-array transmits different waveforms, thereby realizing waveform diversity. In addition, in the same sub-array, the phase is adjusted by weighting to realize The transmitting beam is formed to obtain t...

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Abstract

The invention relates to an MIMO sonar system comprising a transmitting end and a receiving end. A transmitting array of the transmitting end is divided into a plurality of subarrays, each subarray comprises a plurality of array elements, all array elements in each subarray transmit the same waveform, all subarrays transmit different waveforms, and therefore waveform diversities are formed; in the same subarray, transmitting wave beam forming can be realized via all array elements through weighting adjustment of phase positions, and transmitting array gain can be obtained; an echo signal received by each receiving array element is subjected to matching operation via a receiving array of the receiving end, orientation estimation can be performed according to a matching result, and an incidence angle DOA of each array element can be obtained. According to the MIMO sonar system, via subarray dividing operation, all subarrays transmit different waveforms, and therefore waveform diversities can be realized. In the same subarray, the transmitting wave beam forming can be realized through weighting adjustment of the phase positions, and transmitting array gain can be obtained. Each array element in the MIMO sonar system only outputs one waveform, and complex processing of superposition of a plurality of waveforms can be prevented; in terms of hardware, only slight adjustment of a transmitter system of a conventional sonar system is needed.

Description

technical field [0001] The present application relates to the technical field of underwater communication, in particular to a multiple-input multiple-output (Multiple-Input Multiple-output, MIMO) sonar system. Background technique [0002] In the 1990s, in the field of wireless communication, in order to overcome the problem of communication channel fading, MIMO communication was proposed, which realized high-speed wireless communication by using the scattering of the wireless channel. Sex detection offers a new way of thinking. Researchers in the field of radar have introduced the concept of MIMO into radar. With the development of MIMO radar, the research of MIMO detection has also been carried out in the field of sonar. [0003] In the past decade or so, the concept of MIMO has been in full swing, but underwater acoustic channels have complex time-space-frequency characteristics and random fluctuations, and the acoustic propagation conditions are far worse than wireless...

Claims

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Application Information

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IPC IPC(8): G01S15/02G01S7/52G01S7/534
CPCG01S7/52015G01S7/534G01S15/02
Inventor 李璇马晓川陈模江
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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