Post-adaptive processing time-delay beamforming for clutter suppression in airborne radar

2008 ◽  
Vol 44 (5) ◽  
pp. 378 ◽  
Author(s):  
G.M. Herbert ◽  
P.G. Richardson
Keyword(s):  
Time Delay ◽  
Processing Time ◽  
Airborne Radar ◽  
Adaptive Processing ◽  
Clutter Suppression

Short-Range Clutter Suppression for Non-Side Looking Airborne Radar by Elevation Constraint Adaptive Processing

2014 ◽  
Vol 543-547 ◽  
pp. 2414-2417
Author(s):  
Fei He ◽  
Dong Chu Jiang
Keyword(s):  
Covariance Matrix ◽  
Short Range ◽  
Accurate Estimate ◽  
Airborne Radar ◽  
Adaptive Processing ◽  
Clutter Suppression ◽  
Noise Covariance Matrix ◽  
Noise Covariance ◽  
Eigen Decomposition ◽  
Space Time Adaptive Processing

Space-time adaptive processing (STAP) can obtain excellent clutter suppression performance based on the accurate estimate of clutter plus noise covariance matrix which is obtained by enough identical independent distributed samples. However, the short-range clutter of non-side looking airborne radar (non-SLAR) occurs range dependence. As a result, the clutter plus noise covariance matrix can not be estimated accurately and thus the clutter suppressing performance by STAP declines greatly. In this paper, an elevation constraint adaptive processing method is proposed. This method obtains the elevation target steering vector by the eigen-decomposition of the elevation covariance matrix on the ambiguous pure far-range clutter, it is used to suppress short-range clutter and the residual range-independent clutter can be suppressed by two-dimensional azimuth-Doppler STAP methods. Simulation results show validity of the proposed method.

scholarly journals Cross Beam STAP for Nonstationary Clutter Suppression in Airborne Radar

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Yongliang Wang ◽  
Keqing Duan ◽  
Wenchong Xie
Keyword(s):  
Short Range ◽  
Degrees Of Freedom ◽  
Spatial Information ◽  
Space Time ◽  
Primary Component ◽  
Airborne Radar ◽  
Adaptive Processing ◽  
Clutter Suppression ◽  
Simulation Results ◽  
Space Time Adaptive Processing

A novel space-time adaptive processing (STAP) method for nonstationary clutter suppression is proposed. The developed method forms a multibeam along the cross line to participate in adaptive processing, which sufficiently utilizes the spatial information both in azimuth and elevation and guarantees the least system degrees of freedom (DOFs). The characteristics of this structure help to suppress the short-range clutter which is the primary component of nonstationary clutter. Therefore, this method provides favorable clutter suppression performance when clutter range dependence exists. Approach analysis and simulation results are given to demonstrate the effectiveness of the method.

scholarly journals Sparse Bayesian Learning-Based Space-Time Adaptive Processing With Off-Grid Self-Calibration for Airborne Radar

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 47296-47307 ◽  
Author(s):  
Huadong Yuan ◽  
Hong Xu ◽  
Keqing Duan ◽  
Wenchong Xie ◽  
Weijian Liu ◽  
...  
Keyword(s):  
Bayesian Learning ◽  
Space Time ◽  
Airborne Radar ◽  
Sparse Bayesian Learning ◽  
Adaptive Processing ◽  
Self Calibration ◽  
Space Time Adaptive Processing

An Improved Clutter Suppression Method for Non-Sidelooking Uniform Linear Array Antennas Airborne Radar

2013 ◽  
Vol 681 ◽  
pp. 175-180
Author(s):  
Jun Zhao ◽  
Xu Hang
Keyword(s):  
Linear Array ◽  
Compensation Method ◽  
Airborne Radar ◽  
Clutter Suppression ◽  
Uniform Linear Array ◽  
Array Antennas ◽  
Compensation Methods ◽  
Suppression Method ◽  
Simulation Results ◽  
Independent Identically Distributed

The clutter distribution of airborne radar with non-sidelooking uniform linear array antennas varies with ranges and samples in different range gates are not independent identically distributed vectors, so that the statistical STAP methods degrade greatly. In this paper, an improved clutter range dependence compensation method for airborne radar with uniform linear array is proposed. This method involves in a preprocessing with ADC method to align the mainlobe of clutter spectrum in different range gates and subsequently clutter suppression in other azimuths with EDBU technology. Simulation results show the proposed method can reduce the clutter spectrum dispersion significantly and outperform conventional local compensation methods.

Analysis of the impact of the processing time-delay on the stability of a digital GMI magnetometer

2021 ◽  
Author(s):  
Papa Silly Traore ◽  
Serge Konan ◽  
Aktham Asfour ◽  
Jean-Paul Yonnet
Keyword(s):  
Time Delay ◽  
Processing Time ◽  
The Stability ◽  
The Impact
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