26 April 2006 Passive coherent location FPGA implementation of the cross ambiguity function
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Proceedings Volume 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV; 615918 (2006); doi: 10.1117/12.675069
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 2005, Wilga, Poland
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.
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Michael Kvasnička, Antonín Heřmánek, Michal Kuneš, Martin Pelant, Radek Plšek, "Passive coherent location FPGA implementation of the cross ambiguity function", Proc. SPIE 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 615918 (26 April 2006); doi: 10.1117/12.675069; https://doi.org/10.1117/12.675069
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KEYWORDS
Field programmable gate arrays

Signal detection

Signal processing

Computing systems

Standards development

Lithium

Signal analyzers

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