Nonstationary Clutter Suppression Based on Joint-time Secondary Data Selection

doi:10.3969/j.issn.1000-1093.2013.09.005

Abstract

Abstract:

The range dependence is one of the intrinsic features for the clutter of airborne radar, which degrades the performance of conventional space-time adaptive processor (STAP). A novel algorithm of nonstationary clutter suppression, which is based on the joint-time secondary data selection, is presented. Due to the stationarity of radar echo in time domain and the slow change in the Doppler frequency with range, both the slow and quick time secondary data are used as the training samples for sub-CPI adaptive processing to mitigate the range dependence, and ultimately the loss of time aperture is decreased by summing the outputs of all the sub-processors coherently. The simulation results indicate that the algorithm can improve the precision of covariance matrix and the performance of main-lobe clutter suppression, and has a higher robustness.

Key words: radar engineering, clutter suppression, range dependence, time domain, secondary data selection

CLC Number:

TN959. 73

ZHAO Yao-dong, LYU Xiao-de, XIANG Mao-sheng. Nonstationary Clutter Suppression Based on Joint-time Secondary Data Selection[J]. Acta Armamentarii, 2013, 34(9): 1084-1090.

References

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