Title :
Tomographic radar imaging using frame theory
Author :
Ya Jing Huang ; Xuezhi Wang ; Xiang Li ; Moran, Bill
Author_Institution :
Sch. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
Image of a target, which is reconstructed using the return pulses of an inverse synthetic aperture radar (ISAR), can be thought as a vector in a Hilbert space spanned by a frame. In such a vector space, a target image is simply the projection of target returned signals onto the frame. In this paper, a frame processing (FP) method for ISAR imaging is proposed. We show that a dual frame of the target image vector space can be constructed from knowledge of radar parameters and target motion. The image of target can then be reconstructed by the inner product of radar returns and the dual frame. As an alternative to the existing fast Fourier transform (FFT) based approaches, the proposed FP method for ISAR imaging does not suffer from the range walk which is a critical issue associated with FFT based approaches in the ISAR imaging when a long signal sequence is considered to increase the synthetic aperture as to capture more target information. Simulated and experimental results are presented to demonstrate the effectiveness of the proposed method.
Keywords :
Hilbert spaces; fast Fourier transforms; image reconstruction; radar imaging; synthetic aperture radar; FFT; FP method; Hilbert space; ISAR imaging; fast Fourier transform; frame processing method; inverse synthetic aperture radar; radar parameters; target image vector space; target motion; target returned signal projection; tomographic radar imaging; Apertures; Image reconstruction; Image resolution; Imaging; Radar imaging; Vectors; Frame theory; ISAR; Radar imaging; Radar signal processing; Radar waveforms;
Conference_Titel :
Information Fusion (FUSION), 2012 15th International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-0417-7
Electronic_ISBN :
978-0-9824438-4-2