volume | PIER Journals

Abstract

This paper addresses the problem of detecting multiple point-like targets in the presence of steering vector mismatches and Gaussian disturbance with unknown covariance matrix. To this end, we first model the actual useful signal as a vector belonging to a proper cone whose axis coincides with the whitened direction of the nominal array response. Then we develop two robust adaptive detectors resorting to the two-step GLRT-based design procedure without assignment of a distinct set of secondary data. The performance assessment has been conducted by Monte Carlo simulation, also in comparison to previously proposed detectors, and confirms the effectiveness of the newly proposed ones. In the last part of the work, in order to restore the detection performance of the newly proposed detectors in the presence of a large number of range cells contaminated by useful signals, we consider two adaptive detectors which resort to the structure information of the disturbance covariance matrix, and show that the a-priori information on the covariance structure can lead to a noticeable performance improvement.

1. Kelly, E. J., "An adaptive detection algorithm," IEEE Transactions on Aerospace and Electronic Systems, Vol. 22, No. 1, 115-127, 1986.
doi:10.1109/TAES.1986.310745

2. Robey, F. C., D. L. Fuhrman, E. J. Kelly, and R. Nitzberg, "A CFAR adaptive matched filter detector," IEEE Transactions on Aerospace and Electronic Systems, Vol. 29, No. 1, 208-216, 1992.
doi:10.1109/7.135446

3. Conte, E., M. Lops, and G. Ricci, "Adaptive matched filter detection in spherically invariant noise," IEEE Signal Processing Letters, Vol. 3, No. 8, 248-250, 1996.
doi:10.1109/97.511809

4. Pulsone, N. B. and C. M. Rader, "Adaptive beamformer orthogonal rejection test," IEEE Transactions on Signal Processing, Vol. 49, No. 3, 521-529, 2001.
doi:10.1109/78.905870

5. Bandiera, F., A. De Maio, and G. Ricci, "Adaptive CFAR radar detection with conic rejection," IEEE Transactions on Signal Processing, Vol. 55, No. 6, 2533-2541, 2007.
doi:10.1109/TSP.2007.893763

6. Greco, M., F. Gini, and A. Farina, "Radar detection and classification of jamming signals belonging to a cone class," IEEE Transactions on Signal Processing, Vol. 56, No. 5, 1984-1993, 2008.
doi:10.1109/TSP.2007.909326

7. De Maio, A., "Robust adaptive radar detection in the presence of steering vector mismatches," IEEE Transactions on Aerospace and Electronic Systems, Vol. 41, No. 4, 1322-1337, 2005.
doi:10.1109/TAES.2005.1561887

8. Bandiera, F., D. Orlando, and G. Ricci, Advanced Radar Detection Schemes under Mismatched Signal Models, Morgan & Claypool Publishers, USA, 2009.

9. Richmond, C. D., "Performance of the adaptive sidelobe blanker detection algorithm in homogeneous environments," IEEE Transactions on Signal Processing, Vol. 48, No. 5, 1235-1247, 2000.
doi:10.1109/78.839972

10. Hao, C., B. Liu, S. Yan, and L. Cai, "Parametric adaptive radar detector with enhanced mismatched signals rejection capabilities," EURASIP Journal on Advances in Signal Processing, Vol. 2010, Article ID 375136, 11 pages, 2010.

11. Hao, C., B. Liu, and L. Cai, "Performance analysis of a two-stage Rao detector," Signal Processing, Vol. 91, No. 8, 2141-2146, 2011.
doi:10.1016/j.sigpro.2011.03.005

12. Park, J. I. and K. T. Kim, "A comparative study on ISAR imaging algorithms for radar target identification," Progress In Electromagnetics Research, Vol. 108, 155-175, 2010.
doi:10.2528/PIER10071901

13. Huang, C. W. and K. C. Lee, "Application of ICA technique to PCA based radar target recognition," Progress In Electromagnetics Research, Vol. 105, 157-170, 2010.
doi:10.2528/PIER10042305

14. Han, S. K. and H. T. Kim, "Effcient radar target recognition using a combination of range profile and time frequency analysis," Progress In Electromagnetics Research, Vol. 108, 131-140, 2010.
doi:10.2528/PIER10071601

15. Jia, Y., L. J. Kong, and X. B. Yang, "A novel approach to target localization through unknown walls for through-the-wall radar imaging," Progress In Electromagnetics Research, Vol. 119, 107-132, 2011.
doi:10.2528/PIER11052402

16. Deng, H. and H. Ling, "Clutter reduction for synthetic aperture radar imagery based on adaptive wavelet packet transform," Progress In Electromagnetics Research, Vol. 29, 1-23, 2000.
doi:10.2528/PIER99120602

17. Lee, K.-C., C.-W. Huang, and M.-C. Fang, "Radar target recognition by projected features of frequency-diversity RCS," Progress In Electromagnetics Research, Vol. 81, 121-133, 2008.
doi:10.2528/PIER08010206

18. Qu, Y., G. Liao, S.-Q. Zhu, X.-Y. Liu, and H. Jiang, "Performance analysis of beamforming for MIMO radar," Progress In Electromagnetics Research, Vol. 84, 123-134, 2008.
doi:10.2528/PIER08062306

19. Lee, K.-C., J.-S. Ou, and M.-C. Fang, "Application of SVD noise-reduction technique to PCAbased radar target recognition," Progress In Electromagnetics Research, Vol. 81, 447-459, 2008.
doi:10.2528/PIER08032101

20. Habib, M. A., M. Barkat, B. Aissa, and T. A. Denidni, "CA-CFAR detection performance of radar targets embedded in `non centered Chi-2' clutter," Progress In Electromagnetics Research, Vol. 88, 135-148, 2008.
doi:10.2528/PIER08092203

21. Yueh, S. H., J. A. Kong, J. K. Jao, R. T. Shin, H. A. Zebker,T. Le Toan, and H. Ottl, "K-distribution and polarimetric radar clutter," Progress In Electromagnetics Research, Vol. 3, 237-275, 1990.

22. Alyt, O. A. M., A. S. Omar, and A. Z. Elsherbeni, "Detection and localization of RF radar pulses in noise environments using waveletpacket transform and higher order statistics," Progress In Electromagnetics Research, Vol. 58, 301-317, 2006.
doi:10.2528/PIER05070204

23. Bandiera, F., D. Orlando, and G. Ricci, "CFAR detection strategies for distributed targets under conic constraints," IEEE Transactions on Signal Processing, Vol. 57, No. 9, 3305-3316, 2009.
doi:10.1109/TSP.2009.2021707

24. Besson, O., "Adaptive detection with bounded steering vectors mismatch angle," IEEE Transactions on Signal Processing, Vol. 55, No. 4, 1560-1564, 2007.
doi:10.1109/TSP.2006.890820

25. Bandiera, F., D. Orlando, and G. Ricci, "CFAR detection of extended and multiple point-like targets without assignment of secondary data," IEEE Signal Processing Letters, Vol. 13, No. 4, 240-243, 2006.
doi:10.1109/LSP.2005.863653

26. Bandiera, F. and G. Ricci, "Adaptive detection and interference rejection of multiple point-like radar targets," IEEE Transactions on Signal Processing, Vol. 54, No. 12, 4510-4518, 2006.
doi:10.1109/TSP.2006.881223

27. Nitzberg, R., "Application of maximum likelihood estimation of persymmetric covariance matrices to adaptive processing," IEEE Transactions on Aerospace and Electronic Systems, Vol. 16, No. 1, 124-127, 1980.
doi:10.1109/TAES.1980.308887

28. Cai, L. and H. Wang, "A persymmetric multiband GLR algorithm," IEEE Transactions on Aerospace and Electronic Systems, Vol. 28, No. 3, 806-816, 1992.
doi:10.1109/7.256301

29. Casillo, M., A. De Maio, S. Iommelli, and L. Landi, "A persymmetric GLRT for adaptive detection in partially-homogeneous environment," IEEE Signal Processing Letters, Vol. 14, No. 12, 1016-1019, 2007.
doi:10.1109/LSP.2007.906209

30. Pailloux, G., P. Forster, J. P. Ovarlez, and F. Pascal, "Persymmetric adaptive radar detectors," IEEE Transactions on Aerospace and Electronic Systems, Vol. 47, No. 4, 2376-2390, 2011.
doi:10.1109/TAES.2011.6034639

Dr. Chengpeng Hao

Dr. Francesco Bandiera

Dr. Jun Yang

Dr. Danilo Orlando

Dr. Shefeng Yan

Dr. Chaohuan Hou