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Multiple target parameter estimation in multi-frequency array radar

Sebt, M. A ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. Publisher: 2010
  3. Abstract:
  4. Since space diversity and frequency diversity are both efficient techniques in the radar applications, we propose in this paper a method for simultaneous usage of both techniques. On this basis, multi-frequency array radar in which all frequencies are used simultaneously to increase the number of targets that can be uniquely identified, is introduced and analyzed. First, the signal model for such a system is derived and then, it is shown how the use of multi-frequency signal can noticeably improve the parameter identifiability. Specifically, we show the maximum number of targets that can be uniquely identified by the multi-frequency array radar is L times that of its single-frequency array counterpart, where L is the number of frequencies. Finally, the Maximum Likelihood estimator and Cramer-Rao lower bound are derived for the fluctuating and constant reflection coefficient models. By extensive simulations, it is demonstrated that the use of the fluctuating reflection coefficient model estimator is necessary since the constant reflection coefficient model estimator may lead to high estimation errors. Also, it is shown that for a fixed total transmitted power, the parameter estimation error decreases as the number of frequencies increases
  5. Keywords:
  6. Array radar ; Multi-frequency ; Parameter estimation
  7. Source: International Review of Electrical Engineering ; Volume 5, Issue 6 , Nov/Dec , 2010 , Pages 2692-2709 ; 18276660 (ISSN)