Adaptive compensation for wideband radar system distortion based on cross range profiles

Pengjiang Hu; Shiyou Xu; Wenzhen Wu

doi:10.1117/1.JRS.13.014520

21 February 2019 Adaptive compensation for wideband radar system distortion based on cross range profiles

Pengjiang Hu, Shiyou Xu, Wenzhen Wu

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 13, Issue 1, 014520 (February 2019). https://doi.org/10.1117/1.JRS.13.014520

Abstract

Inverse synthetic aperture radar is driven to a larger bandwidth to achieve a finer resolution. However, severe amplitude-phase distortion of radar greatly destroys the amplitude and phase of the chirp signal and hence becomes a major challenge to the fulfillment of the desired high-resolution performance. An adaptive framework is proposed to compensate for the distortion of a wideband radar system without the measurement of its intrinsic characteristic. The distorted image of the target is obtained first and then used to get cross-range profiles (CRPs). Based on the CRPs, amplitude distortion and phase distortion are compensated by the noise level and the autofocus algorithm, respectively. The proposed framework facilitates the compensation and works well in practical applications. Performance of the proposed framework is validated on simulated and measured data.

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Pengjiang Hu, Shiyou Xu, and Wenzhen Wu "Adaptive compensation for wideband radar system distortion based on cross range profiles," Journal of Applied Remote Sensing 13(1), 014520 (21 February 2019). https://doi.org/10.1117/1.JRS.13.014520

Received: 21 June 2018; Accepted: 31 January 2019; Published: 21 February 2019

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KEYWORDS

Distortion

Radar

Image quality

Fourier transforms

Satellites

Spherical lenses

Detection and tracking algorithms

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