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Multichannel radar adaptive signal detection in interference and structure nonhomogeneity

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Abstract

In this paper, we consider the problem of multichannel radar signal detection in interference and structure nonhomogeneity. The interference is often caused by electromagnetic countermeasure (ECM) systems or industrial activity, while the nonhomogeneity usually arises because of rapid variations in terrain or radar antenna structure. We propose three adaptive detectors according to three common criteria of detector design, namely, the generalized likelihood ratio test (GLRT), Rao test, and Wald test. Extensive performance comparisons are conducted under different scenarios. It is shown that when the nonhomogeneity is severe, the detector devised according to the GLRT achieves the best detection performance. In other scenarios, the detector designed according to the Wald test may be the best choice, which has the highest probability of detection.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 61501505, 61501351).

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Correspondence to Yong-Liang Wang.

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Conflict of interest The authors declare that they have no conflict of interest.

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Liu, W., Han, H., Liu, J. et al. Multichannel radar adaptive signal detection in interference and structure nonhomogeneity. Sci. China Inf. Sci. 60, 112302 (2017). https://doi.org/10.1007/s11432-016-9105-7

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Keywords

  • adaptive detection
  • generalized likelihood ratio test
  • heterogeneity
  • interference
  • multichannel signal
  • nonhomogeneity
  • Rao test
  • Wald test