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Proceedings Paper

Passive coherent location FPGA implementation of the cross ambiguity function
Author(s): Michael Kvasnička; Antonín Heřmánek; Michal Kuneš; Martin Pelant; Radek Plšek
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Paper Abstract

One of key problem in passive coherent location (PCL) is effective and accurate computation of the cross ambiguity function (CAF). This function is related to the direct signal and signals reflected from localized targets. PCL systems exploit high-power commercial transmitters of opportunity (FM, TV, etc.) to take advantage of lower frequencies, multistatic geometries and covert deployment. The transmitter does not have to cooperate with the receiver. The CAF represent power spectral density distribution of the cross-correlation between direct and reflected signals. It depends on mutual time delay and frequency shift of the input signals and is considerate as primary information for detection, localization and identification of the tracked targets. Regarding above mentioned reasons has to be important develop optimal (numerically effective and sufficiently accurate) implementation of the HW architecture based on FPGA for CAF computation, which will be suitable for future real-time PCL systems. As a first result which originates on the ongoing mutual cooperation between ERA a.s. and UTIA is design of the PC accelerator card for CAF computation based on Xilinx FPGA processor. The presented contribution gives overall information about used algorithms, FPGA accelerator card design and achieved performance. The future possibilities of the additional enhancements are discussed.

Paper Details

Date Published: 26 April 2006
PDF: 8 pages
Proc. SPIE 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 615918 (26 April 2006); doi: 10.1117/12.675069
Show Author Affiliations
Michael Kvasnička, ERA a.s. (Czech Republic)
Antonín Heřmánek, UTIA AV CR (Czech Republic)
Michal Kuneš, UTIA AV CR (Czech Republic)
Martin Pelant, ERA (Czech Republic)
Radek Plšek, Technical Univ. of Pardubice (Czech Republic)

Published in SPIE Proceedings Vol. 6159:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV
Ryszard S. Romaniuk, Editor(s)

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