A scheme of auto ship detection for skywave OTH radar within short CITs

Auto ship detection for high frequency (HF) skywave over-the-horizon (OTH) radar, being a valuable application, has not been achieved virtually within short coherent integration times (CITs). Because the ships' lines in the spectrum can be covered by the ocean clutter's easily as a result of the poor resolution, which attenuates the validities of ocean clutter suppression algorithms. Besides, when the backscatter echo of ocean clutter becomes complicated, which can often be caused by the complex environmental factors, the performance of ocean clutter suppression algorithms also degrades. To achieve auto ship detection within short CITs, a scheme employing algorithms including Orthogonal Matching Pursuit (OMP), eigenvalue-decomposition (EVD) and constant false alarm rate (CFAR) processor, called OEC scheme which is the acronym for the methods applied, is proposed in this paper. Simulations approves the validation of the scheme.

[1]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[2]  B. Root,et al.  HF radar ship detection through clutter cancellation , 1998, Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197).

[3]  Joel A. Tropp,et al.  Signal Recovery From Random Measurements Via Orthogonal Matching Pursuit , 2007, IEEE Transactions on Information Theory.

[4]  Lucy R. Wyatt,et al.  Evaluation of the use of the modified-covariance method in HF radar ocean measurement , 2001 .

[5]  Benjamin T. Root,et al.  HF‐over‐the‐horizon radar ship detection with short dwells using clutter cancelation , 1998 .

[6]  Gao Shan,et al.  Detection of ships for OTHR based on AR-MUSIC algorithm , 2009, 2009 International Conference on Wireless Communications & Signal Processing.

[7]  Lie Wang,et al.  Orthogonal Matching Pursuit for Sparse Signal Recovery With Noise , 2011, IEEE Transactions on Information Theory.

[8]  Jianwen Chen,et al.  A method to estimate subspace via Doppler for ocean clutter suppression in skywave radars , 2011, Proceedings of 2011 IEEE CIE International Conference on Radar.

[9]  J. Barnum,et al.  Ship detection with high-resolution HF skywave radar , 1986 .

[10]  D. Crombie,et al.  Doppler Spectrum of Sea Echo at 13.56 Mc./s. , 1955, Nature.

[11]  Martin W. Y. Poon,et al.  A singular value decomposition (SVD) based method for suppressing ocean clutter in high frequency radar , 1993, IEEE Trans. Signal Process..

[12]  Qiang Yong.  Transient Interference Excision in OTHR , 2002 .

[13]  Bao Zheng,et al.  An approach to detecting the targets of aircraft and ship together by over-the-horizon radar , 2001, 2001 CIE International Conference on Radar Proceedings (Cat No.01TH8559).

[14]  Liu Xing-zhao.  An Improved Ocean Clutter Cancellation Algorithmwith Short Dwells in Sky-wave Radars , 2004 .