Effects of wideband waveforms on simultaneous scattering matrix measurement of manoeuvring targets. Issue 5 (1st May 2019)

• Record Type: Journal Article
• Authors: Liu, Qiao‐ling; Pang, Chen; Li, Yong‐zhen; Wang, Xue‐song
• Is Part Of: IET radar, sonar & navigation. Volume 13:Issue 5(2019)
• Page Start: 802
• Page End: 813
• Publication Date: 2019-05-01
• Subjects: Doppler radar -- echo -- S‐matrix theory -- radar detection -- polarisation -- radar imaging -- radar cross‐sections -- phase coding -- filtering theory -- target tracking -- radar signal processing -- matched filters -- radar resolution -- radar target recognition -- frequency modulation; Taylor series expansion -- phase expressions -- phase errors -- time–frequency allocation -- orthogonal waveforms -- PSM -- frequency modulation waveforms -- phase‐coded waveforms -- orthogonal linear frequency modulation signals -- SNR loss -- velocity error effect -- wideband waveforms -- simultaneous scattering matrix measurement -- manoeuvring targets -- polarimetry -- Doppler characteristics -- remote sensing applications -- Doppler information -- dynamic properties -- radar targets -- accurate polarisation measurements -- high‐speed targets -- relativistic effect -- conventional matched filter -- scale effect -- polarisation scattering matrix -- signal‐to‐noise ratio loss; Signal processing -- Periodicals; Radar -- Periodicals; Sonar -- Periodicals; Electronics in navigation -- Periodicals; Navigation -- Periodicals; 621.3848
• DOI: 10.1049/iet-rsn.2018.5268
• Languages: English
• ISSNs: 1751-8784

Abstract

Abstract : Both polarimetry and Doppler characteristics can be employed in remote sensing applications. Doppler information provides insight into the dynamic properties of radar targets, and polarimetry is associated with the intrinsic attributes of targets. Determining how to obtain accurate polarisation measurements from Doppler information has been a concern. For high‐speed targets, the relativistic effect on radar wideband echoes may be notable. With the conventional matched filter, this scale effect may produce significant amplitude and phase errors between two columns of the polarisation scattering matrix (PSM), except for signal‐to‐noise ratio (SNR) loss. On the basis of the Taylor series expansion, the amplitude and phase expressions are derived in this study. Theoretical analysis shows that the amplitude and phase errors are related to the time–frequency allocation of the orthogonal waveforms and that the accuracy of the PSM is more susceptible to scale factors using frequency modulation waveforms than phase‐coded waveforms. To suppress these amplitude and phase errors, a compensation method is proposed for orthogonal linear frequency modulation signals. Furthermore, the performances of the SNR loss and the velocity error effect are given. Finally, some numerical experimental results are provided to illustrate the effectiveness of the compensation.