A Survey With Simulation on DVB-Based Passive Radar

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Radmard, Mojtaba | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39589 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Bastani, Mohammad Hassan; Behnia, Ferydon
Abstract:
One of non-cooperative illuminators recently considered for passive radar application is the DVB-T signal. Its thumbtack ambiguity function beside the constancy over time makes it very desirable. But there are some ambiguities in its ambiguity function that can not be neglected. In this paper, after studying the reasons of the ambiguities we propose some processings to remove them. It is shown that for removing the ambiguities, it’s sufficient to filter out continual pilots and equalize scattered pilots. The results show that an ambiguity function relatively without ambiguities will be obtained. A method for compensating the target’s range migration-that results in processing gain decrease with time integration increase- is proposed. Also DVB-T’s CAF processing gain, constancy over time and direct path interference (DPI) cancellation are studied.
Keywords:
Cross Ambiguity Function ; Direct Path Interference ; Passive Radar ; Digital Video Broadcasting (DVB)

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