基于直接阵元-脉冲域对消的PSTAP风切变检测

doi:10.12305/j.issn.1001-506X.2026.02.10

Abstract

Abstract:

To address the issue that the performance of existing polarimetric space-time adaptive processing （PSTAP） methods for wind shear detection declines due to the severe shortage of independent and identically distributed samples in non-uniform environments, a PSTAP wind shear detection method based on direct element-pulse domain cancellation is proposed. Firstly, a clutter basis matrix is constructed based on prior knowledge, and the clutter source amplitude is iteratively estimated using a weighted least squares criterion to complete the reconstruction of clutter data. Secondly, the reconstructed clutter data is directly canceled in the element-pulse domain. Finally, the clutter-suppressed signals undergo polarimetric fusion processing, wind speed estimation, and factor calculation to detect low-altitude wind shear. Simulation experiment results show that compared with other methods, the proposed method achieves smaller errors in wind speed estimation, and its estimation results exhibit a higher degree of consistency with the original wind speed distribution; the hazardous-region decision based on the F-factor is consistent with the true F-factor decision, which verify that the proposed method can effectively detect polarimetric wind shear signals in non-uniform environments.

Key words: airborne dual-polarization weather radar, polarimetric space-time adaptive processing (PSTAP), inhomogeneous environment, wind shear detection

CLC Number:

959.4

Hai LI, Jingrui GUO, Yifan QIU, Qingbin FAN, Yi FAN. PSTAP wind shear detection based on direct element-pulse domain cancellation[J]. Systems Engineering and Electronics, 2026, 48(2): 478-489.

Figures/Tables 12

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References 30

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地表类型	$ {\sigma }_{c} $	$ {A}_{0} $	$ {B}_{0} $	$ {\beta }_{0} $
农田	1	0.004000	$ 0.5\text {π} $	0.200
高山	1	0.004000	$ 0.5\text {π} $	0.500
泥地	1	0.001945	$ 0.5\text {π} $	0.155
雪地	1	0.002630	$ 0.5\text {π} $	0.170
草地	1	0.005720	$ 0.5\text {π} $	0.240
庄稼地	1	0.007400	$ 0.5\text {π} $	0.280
树林	1	0.009160	$ 0.5\text {π} $	0.320
裸石地	1	0.010880	$ 0.5\text {π} $	0.360
丘陵	1	0.012600	$ 0.5\text {π} $	0.400

地表类型	$ {\delta }_{c} $	$ {r}_{c} $	$ \rho \sqrt{{r}_{c}} $
水面	0.05	3.54	1.67
草地	0.19	1.03	0.53
裸土	0.08	2.04	1.27
树林	0.16	0.89	0.61
建筑物	0.02	0.11	0.22
混合植被	0.19	1.08	0.6
城市道路	0.19	1.69	0.77

参数	值	参数	值
飞机高度/m	600	阵元数量	8
波长/m	0.05	相干脉冲数	64
PRF/Hz	7000	杂噪比/dB	50
飞机速度/（m/s）	75	信噪比/dB	5
距离分辨率/m	150	主瓣指向/（°）	（90,0）

估计方法	均方根误差
最优PSTAP	15.7740
双极化通道融合的STAP	11.7432
单极化直接阵元−脉冲域对消	4.4590
所提方法	1.4803

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PSTAP wind shear detection based on direct element-pulse domain cancellation

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