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Sonar signal processing method based on ZYNQ-7000 platform

A signal processing and sonar technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of complex design and insufficient logic resources, and achieve the effect of fast processing and saving logic resources

Inactive Publication Date: 2016-07-20
ZHEJIANG UNIV
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Problems solved by technology

[0007] The invention discloses a sonar signal processing method based on the ZYNQ-7000 platform, which divides the MVDR direction finding algorithm into modules, and the divided modules run on the platform's dual-core processor and FPGA respectively, solving the problem of simply using the FPGA The MVDR direction-finding algorithm was implemented on the ZYNQ-7000 platform for the problems of insufficient logic resources and complex design when processing sonar signals

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[0038] The sonar signal processing method based on the ZYNQ-7000 platform of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] Main algorithm processing module division and data flow chart of the present invention are attached figure 1 shown.

[0040] The front end of the MVDR direction finding module has 4 channels of sampling data (the sampling data is a time domain signal). The input sampling data takes a frequency point at intervals of 1 Hz in each frequency band (frequency band width 100 Hz), and 101 frequency points are obtained in each frequency band, and each frequency point is subjected to 2000-point fast discrete Fourier transform.

[0041] The ZYNQ-7000 platform includes a dual-core processor (PS) and FPGA (PL). The inverse matrix solution of the MVDR direction finding algorithm is completed by PL in conjunction with PS. PL sends four discrete Fourier transform results S i (i≤4), i is the serial number,...

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Abstract

The present invention discloses a sonar signal processing method based on a ZYNQ-7000 platform. The ZYNQ-7000 platform comprises a dual-core processor and a FPGA which perform data interaction through an AXI bus protocol; prior to the sonar signal processing, the FGPA source of the ZYNQ-7000 platform is estimated; the MVDR direction finding algorithm is divided into a main body algorithm and an auxiliary algorithm based on the estimation result and the MVDR direction finding algorithm; the main body algorithm is realized on the FPGA, and the auxiliary algorithm is realized on the dual-core processor; and when the sonar signal processing is performed, the sonar signals are received, and the main body algorithm and the auxiliary algorithm are called to obtain the processing results. The sonar signal processing method based on a ZYNQ-7000 platform is able to perform modularization division of the MVDR direction finding algorithm, divided modules are operated in the dual-core processor and the FPGA of the platform, and the processing speed is fast and the logic source of the FPGA is saved.

Description

technical field [0001] The invention relates to the technical field of sonar signal processing, in particular to a sonar signal processing method based on the ZYNQ-7000 platform. Background technique [0002] In the field of sonar signal processing, embedded systems are generally used to process real-time sampling signals. Based on the characteristics of sonar signals, there are often high requirements for the real-time performance and processing speed of the system. Therefore, general embedded systems often use DSP processors or FPGAs to process real-time signals. [0003] The MVDR algorithm uses the correlation matrix containing the sound field information provided by the matrix to realize the estimation of the azimuth spectrum. This method uses the underwater acoustic sensor array to obtain the target radiation signal, estimates the sound pressure of the plane wave in the specified direction, and determines the position of the sound source. [0004] The function of MVDR ...

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Application Information

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IPC IPC(8): G01S7/539
CPCG01S7/539
Inventor 田翔陈耀武周凡王益忠
Owner ZHEJIANG UNIV
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