Journal of Systems Engineering and Electronics ›› 2024, Vol. 35 ›› Issue (1): 43-54.doi: 10.23919/JSEE.2023.000147

• RADAR DETECTION AND INTERFERENCE SUPPRESSION • Previous Articles    

Adaptive detection of range-spread targets in homogeneous and partially homogeneous clutter plus subspace interference

Tao JIAN1,*(), Jia HE1(), Bencai WANG2(), Yu LIU1(), Congan XU1(), Zikeng XIE1()   

  1. 1 Research Institute of Information Fusion, Naval Aviation University, Yantai 264001, China
    2 Air Force Early Warning Academy, Wuhan 430019, China
  • Received:2022-05-16 Accepted:2023-10-26 Online:2024-02-18 Published:2024-03-05
  • Contact: Tao JIAN E-mail:work_jt@163.com;1191804968@qq.com;springbook7559@126.com;liuyu77360132@126.com;xcatougao@163.com;1397850644@qq.com
  • About author:
    JIAN Tao was born in 1980. He received his B.S., M.S., and Ph.D. degrees in electronic engineering from Naval Aeronautical and Astronautical University (NAAU), Yantai, China, in 2003, 2006, and 2011, respectively. His research interest is radar target adaptive detection. E-mail: work_jt@163.com

    HE Jia was born in 1999. He received his B.S. degree in electronic engineering from the Naval Aviation University, Yantai, China, in 2020, where he is currently pursuing his master ’s degree. His research interest is radar signal processing. E-mail: 1191804968@qq.com

    WANG Bencai was born in 1980. He received his Ph.D. degree in information and communication engineering, from the Naval Aviation University, Yantai, China in 2011. Since 2013. His research interest is radar signal processing. E-mail: springbook7559@126.com

    LIU Yu was born in 1986. He received his B.S. and Ph.D. degrees in information and communication engineering from the Naval Aviation University, Yantai, China, in 2008 and 2014, respectively. His research interests include radar signal and data processing. E-mail: liuyu77360132@126.com

    XU Congan was born in 1987. He received his M.S. and Ph.D. degrees from Naval Aviation University, Yantai, China, in 2013 and 2016, respectively. His research interests include intelligent perception and fusion, and deep learning and its application. E-mail: xcatougao@163.com

    XIE Zikeng was born in 1998. He received his B.S. degree in systems engineering from the Naval Aviation University, Yantai, China, in 2020, where he is currently pursuing his master’s degree. His research interest is radar signal processing E-mail: 1397850644@qq.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (61971432), Taishan Scholar Project of Shandong Province (tsqn201909156), and the Outstanding Youth Innovation Team Program of University in Shandong Province (2019KJN031).

Abstract:

Adaptive detection of range-spread targets is considered in the presence of subspace interference plus Gaussian clutter with unknown covariance matrix. The target signal and interference are supposed to lie in two linearly independent subspaces with deterministic but unknown coordinates. Relying on the two-step criteria, two adaptive detectors based on Gradient tests are proposed, in homogeneous and partially homogeneous clutter plus subspace interference, respectively. Both of the proposed detectors exhibit theoretically constant false alarm rate property against unknown clutter covariance matrix as well as the power level. Numerical results show that, the proposed detectors have better performance than their existing counterparts, especially for mismatches in the signal steering vectors.

Key words: adaptive detection, subspace interference, constant false alarm rate, Gradient test, partially homogeneous environment