Detection of low probability of intercept radar signals

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Authors
  1. Wong, K.M.
  2. Davidson, T.
  3. Abelkader, S.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN);McMaster Univ, Hamilton ONT (CAN)
Abstract
Modern radar systems employ new type of signals, which are more difficult to detect and exploit. These signals are known as Low Probability of Intercept (LPI) signals. In this project, we study the performance of the intercept receiver in the scenario of LPI signals. We propose different techniques to detect and characterize the intercepted signals. We study the application of time-frequency techniques to this problem. Namely, we apply the Wigner-Ville distribution method to construct the time-frequency spectrum of the received signal and detect the presence of a radar signal. We apply the Hough transform, as a line detector, to the Wigner-Ville spectrum to enhance the performance of signal detection and estimation. We also propose the use of a novel technique for the detection/estimation of the intercepted radar signals. This technique is based on cross-correlation properties, and is shown to enjoy very fast processing time together with very accurate detection/estimation performance. Various numerical examples are included to evaluate the performance of these proposed methods under different scenarios.

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Keywords
Low Probability of Intercept (LPI) signals;Wigner-Ville distribution;cross-correlation
Report Number
DRDC-OTTAWA-CR-2009-142 — Contractor Report
Date of publication
01 Sep 2009
Number of Pages
52
DSTKIM No
CA032871
CANDIS No
532085
Format(s):
Electronic Document(PDF)

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