Time-frequency-based detection of fast maneuvering targets using high-frequency surface-wave radar

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Authors
  1. Thayaparan, T.
  2. Stankovic, L.
  3. Dakovic, M.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
The time-frequency representation is a powerful tool for the analysis of non-stationary signals. In the past decades, time-frequency representations have been primarily devoted to analysis tasks in the sense that they were introduced so as to depict the time-frequency structure of time-varying signals and non-stationary processes in the time-frequency plane. However, besides this approach, there has been also a permanent interest for tackling decision problems by means of time-frequency representations. In this report, we present a time-frequency-based detection scheme for the high-frequency surface-wave radar (HFSWR) for the detection of maneuvering air targets in the presence of strong sea-clutter. The performance of the proposed method is evaluated using both synthetic and experimental data. In addition, the proposed time-frequency detection scheme is examined in detail with different signal-to-noise ratio and various examples are considered. The time-frequency-based detection method is then compared with the Fourier-based detector. Results clearly demonstrate that the time-frequency-based detector can significantly improve the detection performance of the HFSWR and add considerable physical insight over what can be achieved by conventional Fourier-based detector currently used by HFSWRs. These results distinctly suggest that the Fourier-based detector is optimal for stationary signals, whereas the Time-Frequency-based detector is optimal for non-stationary signals.

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Report Number
DRDC-OTTAWA-TM-2009-282 — Technical Memorandum
Date of publication
01 Feb 2010
Number of Pages
44
DSTKIM No
CA033609
CANDIS No
532996
Format(s):
Electronic Document(PDF)

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