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| Citation: | Wang Yuzhuo, Zhu Shengqi, Xu Jingwei. A Range-ambiguous Clutter Suppression Method for MIMO Bistatic Airborne Radar[J]. Journal of Radars, 2018, 7(2): 202-211. doi: 10.12000/JR18016
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A Range-ambiguous Clutter Suppression Method for MIMO Bistatic Airborne Radar
doi: 10.12000/JR18016
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Abstract
The ground clutter of sidelooking Multiple-Input Multiple-Output (MIMO) bistatic radar has severe problems of range-dependence and clutter spectrum spreading. In this paper, the clutter characteristics of bistatic airborne radars are analyzed and a method of range-ambiguous clutter suppression is proposed. This method employs the range-dependent phase term in the traditional MIMO bistatic radar to provide extra degrees of freedom. The range information of the phase term enables clutter separation with different ranges and consequent suppression. Thus, a range-ambiguous clutter suppression for bistatic airborne early warning radars is achieved. The simulation results show the accuracy of the method. By a comparison with the existing Doppler Warping (DW) and clutter suppression method with the Improved Factor (IF) line, the results showed that the method has better performance, which proved the effectiveness of ambiguous clutter suppression in MIMO bistatic radars. -
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References
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- Figure 1. Geometric schematic diagram of FDA-MIMO bistatic radar
- Figure 2. Block diagram of receiving signal processing
- Figure 3. Bistatic radar clutter spectrum
- Figure 4. Flow chart of radar data processing
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Figure 6. The corresponding clutter spectrum of
$\Delta f$ - Figure 5. Bistatic radar clutter spectrum
- Figure 7. Bistatic radar clutter spectrum
- Figure 8. IF characteristics of radar clutter
- Figure 9. Bistatic MIMO radar clutter ridge
- Figure 10. FDA-MIMO bistatic radar clutter spectrum of DW compensation method
- Figure 11. Comparison of FDA-MIMO bistatic radar IF lines