Adaptive waveform optimization design for target detection in cognitive radar

Xiaowen Zhang; Kaizhi Wang; Xingzhao Liu

doi:10.1117/1.JRS.11.015024

20 March 2017 Adaptive waveform optimization design for target detection in cognitive radar

Xiaowen Zhang, Kaizhi Wang, Xingzhao Liu

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 11, Issue 1, 015024 (March 2017). https://doi.org/10.1117/1.JRS.11.015024

Abstract

The problem of adaptive waveform design for target detection in cognitive radar (CR) is investigated. This problem is analyzed in signal-dependent interference, as well as additive channel noise for extended target with unknown target impulse response (TIR). In order to estimate the TIR accurately, the Kalman filter is used in target tracking. In each Kalman filtering iteration, a flexible online waveform spectrum optimization design taking both detection and range resolution into account is modeled in Fourier domain. Unlike existing CR waveform, the proposed waveform can be simultaneously updated according to the environment information fed back by receiver and radar performance demands. Moreover, the influence of waveform spectral phase to radar performance is analyzed. Simulation results demonstrate that CR with the proposed waveform performs better than a traditional radar system with a fixed waveform and offers more flexibility and suitability. In addition, waveform spectral phase will not influence tracking, detection, and range resolution performance but will greatly influence waveform forming speed and peak-to-average power ratio.

Citation Download Citation

Xiaowen Zhang, Kaizhi Wang, and Xingzhao Liu "Adaptive waveform optimization design for target detection in cognitive radar," Journal of Applied Remote Sensing 11(1), 015024 (20 March 2017). https://doi.org/10.1117/1.JRS.11.015024

Received: 16 November 2016; Accepted: 28 February 2017; Published: 20 March 2017

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KEYWORDS

Radar

Target detection

Chromium

Filtering (signal processing)

Receivers

Signal detection

Signal processing

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