Abstract
In this paper, we consider the problem of adaptive detection for distributed targets embedded in Gaussian disturbance without secondary data. We suppose that some a-priori spectral models for the interference in the cells under test and a lower bound on the power spectral density of the white disturbance term are available. First, we propose an approximate estimation algorithm for the unknown parameters under both hypotheses. Then, we propose a generalized likelihood ratio test that employs the approximate estimates. Finally, we evaluate the performance of the proposed detector under Gaussian disturbance and verify its advantage to some existing techniques.
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Notes
The radar sends a succession of N periodic pulses, i.e., N repetitions of a waveform, over a coherent processing interval (CPI).
The covariance matrices are Hermitian. For a general \(N \times N\) complex Hermitian matrix, there is a total of \((N\times N+N)/2\) free complex parameters.
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Acknowledgments
This work was sponsored by National Natural Science Foundation of China (61301266, 61178068 and 61201276) and by Fundamental Research Funds of Central Universities (ZYGX2012YB005 and ZYGX2012Z001) and by Program for New Century Excellent Talents in University (A1098524023901001063).
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Zhou, Y., Yang, H., Li, N. et al. Adaptive Detection of Distributed Targets in Gaussian Clutter Based on Multiple A-Priori Spectral Models. Circuits Syst Signal Process 36, 420–434 (2017). https://doi.org/10.1007/s00034-016-0300-0
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DOI: https://doi.org/10.1007/s00034-016-0300-0