MIMO (multiple input multiple output) based high-resolution underwater target detection device and method

Abstract

The invention discloses an MIMO (multiple input multiple output) based high-resolution underwater target detection device and method. According to the invention, a potential target is actively detected through a plurality of mutually-orthogonal detection waveforms transmitted by a transmitting transducer array in a hydroacoustic environment, and a hydrophone-array received target echo is received. Through MIMO processing, a method for carrying out detection and estimation on an MIMO frame is established, and the extension of waveform diversity gains and virtual array apertures is obtained. By using the MIMO based underwater target detection method disclosed by the invention, in the process of carrying out hydroacoustic target detection, compared with conventional phase control, a higher detection resolution and higher parameter identification performance can be obtained.

Description

technical field [0001] The invention relates to a MIMO-based high-resolution underwater target detection method, is a new sonar signal processing method, and belongs to the field of underwater acoustic target detection and positioning. Background technique [0002] The existing underwater target detection methods based on the horizontal transceiver array structure are all phased array structures. The transmitting array sends the same detection signal to a certain direction, and detects all interested directions by scanning, and the receiving array receives the signal echo. , realize target detection and localization by beamforming and matched filtering of the received signal. The target resolution of the phased array detection method is proportional to the array aperture of the receiving array. Therefore, in order to improve the resolution of the target, it can be achieved by increasing the aperture of the transmitting and receiving array, but the expansion of the aperture ...

AI Technical Summary

Problems solved by technology

Therefore, in order to improve the resolution of the target, it can be achieved by increasing the aperture of the transmitting and receiving array, but the expansion of the aperture of the array requires more transmitting and receiving equipment, a more complex sonar system design, and a greater economic cost

Moreover, the phased array emits the same signal in a directional manner, and can only detect one azimuth of interest at a time. To achieve all-round detection, multiple omni-directional scans are required, which requires a lot of detection time.

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