@article{396a7a7e0ab243bdae57b2cfe530e9f0,
title = "Adaptive waveform design for improved detection of low-RCS targets in heavy sea clutter",
abstract = "The dynamic adaptation of waveforms for transmission by active radar has been facilitated by the availability of waveform-agile sensors. In this paper, we propose a method to employ waveform agility to improve the detection of low radar-cross section (RCS) targets on the ocean surface that present low signal-to-clutter ratios due to high sea states and low grazing angles. Employing the expectation-maximization algorithm to estimate the time-varying parameters for compound-Gaussian sea clutter, we develop a generalized likelihood ratio test (GLRT) detector and identify a range bin of interest. The clutter estimates are then used to dynamically design a phase-modulated waveform that minimizes the out-of-bin clutter contributions to this range bin. A simulation based on parameters derived from real sea clutter data demonstrates that our approach provides around 10 dB improvement in detection performance over a nonadaptive system.",
keywords = "Detection, Sea clutter, Waveform design, Waveform-agile sensing",
author = "Sira, {Sandeep P.} and Douglas Cochran and Antonia Papandreou-Suppappola and Darryl Morrell and William Moran and Howard, {Stephen D.} and Robert Calderbank",
note = "Funding Information: Manuscript received September 1, 2006; revised February 14, 2007. This work was supported in part by the U.S. Department of Defense under Multi University Research Initiative Grant AFOSR FA9550-05-1-0443 administered by the Air Force Office of Scientific Research; by DARPA, Waveforms for Active Sensing Program under NRL Grant N00173-06-1-G006; and the International Science Linkages established under the Australian Government{\textquoteright}s innovation statement “Backing Australia{\textquoteright}s Ability.” The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Maria Sabrina Greco. Funding Information: Dr. Moran is a Fellow of the Australian Academy of Science and a Member of Australian Research Council College of Experts. He also serves as a Consultant to the Australian Department of Defence, through the Defence Science and Technology Organization.",
year = "2007",
month = jun,
doi = "10.1109/JSTSP.2007.897048",
language = "English (US)",
volume = "1",
pages = "56--66",
journal = "IEEE Journal on Selected Topics in Signal Processing",
issn = "1932-4553",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "1",
}