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Adaptive Waveform Design and Sequential Hypothesis Testing for Target Recognition With Active Sensors

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3 Author(s)
Goodman, N.A. ; Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ ; Venkata, P.R. ; Neifeld, M.A.

Cognitive radar is a recently proposed approach in which a radar system may adaptively and intelligently interrogate a propagation channel using all available knowledge including previous measurements, task priorities, and external databases. A distinguishing characteristic of cognitive radar is that it operates in a closed loop, which enables constant optimization in response to its changing understanding of the channel. In this paper, we compare two different waveform design techniques for use with active sensors operating in a target recognition application. We also propose the integration of waveform design with a sequential-hypothesis-testing framework that controls when hard decisions may be made with adequate confidence. The result is a system that updates multiple target hypotheses/classes based on measured data, customizes waveforms as the class probabilities change, and draws conclusions when sufficient understanding of the propagation channel is achieved

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Selected Topics in Signal Processing, IEEE Journal of  (Volume:1 ,  Issue: 1 )