Hardware implementation of parametric algorithm for asynchronously gathered measurement data based on the FPGA technology

• Autorzy: Janowski T. , Szworski K. , Zając R.
• Języki publikacji: EN

Abstrakty

EN

The hydroacoustic system based on DOA estimation utilizes passive antenna composed of many hydrophones. The samples of the arriving acoustic signal must be gathered synchronously from each hydrophone. This enables to take advantage of parametric processing signals methods. These methods make possible determination of the amplitude and the phase relationship among particular hydrophones. The newest complex systems made up of many sub modules uses network solutions. In the case of Ethernet network some standards (e.g. Precision Time Protocol) are defined to enable synchronization of the data (samples) gathered from many hydrophones by the clock synchronization. When the antenna consists of few hydrophones then the special concentrator connected point-to-point to hydrophones can be utilized. This article discusses the issue related to PTP as well as concentrator based on FPGA technology, which uses simple UDP protocol. In the case of concentrator the synchronous method of the I/Q detection which not requires synchronous samples acquisition is also presented.

Słowa kluczowe

EN

hardware implementation; FPGA technology; hydroacoustic system

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2009
• Tom: Vol. 12
• Strony: 83--90
• Opis fizyczny: Bibliogr. 6 poz., rys.,wykr.

Twórcy

autor

Janowski T.

autor

Szworski K.

autor

Zając R.

• Ośrodek Badawczo-Rozwojowy Centrum Techniki Morskiej S.A., Poland, 81-109 Gdynia, ul Dickmana 62,

Bibliografia

• [1] E. B. Hogenauer, An Economical Class of Digital Filters for Decimation and Interpolation, IEEE Transactions on Acoustic, Speech, and Signal Processing No.2 , April 1981.
• [2] Xilinx CIC Compiler v1.2, Product Specification DS613 April 2008.
• [3] Xilinx Virtex-5 Family Overview DS100, February 2008.
• [4] J. Eidson, IEEE-15888 Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control System, October 2005.
• [5] National Semiconductor DP83640 Precision PHYTER-IEEE 1588 Precision Time Protocol Transceiver, February 2008.
• [6] Bjorge, NAXYS Ethernet Hydrophone 02345, Product specification.