Journal ArticleDOI
Oblique projection polarisation filtering for interference suppression in high-frequency surface wave radar
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TLDR
In this article, an oblique projection polarisation filter (OPPF) is proposed for interference suppression in high-frequency surface wave radar (HFSWR), which can be constructed from the polarisation subspaces of the target signal and those of the interference or directly from experimental data.Abstract:
Polarisation filtering is a valid approach for interference suppression in high-frequency surface wave radar (HFSWR) and other systems. Based on the fundamental principle of the oblique projection and polarised filtering, an oblique projection polarisation filter (OPPF), which can be constructed from the polarisation subspaces of the target signal and those of the interference or directly from experimental data, is proposed in this study. Generalised methods for constructing the OPPF operators (theoretical OPPF and improved OPPF) are provided and the impact on the performance caused by the estimation errors is also discussed. Numerical results from simulation and experimental data demonstrate that the proposed filter is an effective means of interference cancellation. It is proved that OPPF is an extension of the conventional polarised filter, whereas the improved OPPF is more suitable for the situation where the interference is unknown.read more
Citations
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A W-Band High-Aperture-Efficiency Multipolarized Monopulse Cassegrain Antenna Fed by Phased Microstrip Patch Quad
TL;DR: In this paper, a W-band multipolarized monopulse Cassegrain antenna is proposed, in which a phased dual-polarized microstrip patch quad is employed to feed the hyperbolic subreflector.
Journal ArticleDOI
Angle Estimation of Extended Targets in Main-Lobe Interference With Polarization Filtering
TL;DR: To effectively extract the angle of the extended target accurately after polarization filtering, duplex polarization filtering and polarization filtering extractor based on a covariance matrix are developed.
Journal ArticleDOI
Amplitude Angle Monopulse Estimation for the Four-Channel Hybrid Polarimetric Radar System
TL;DR: The polarimetric amplitude angle monopulse estimation method is proposed to obtain the correct angle by changing the channel synthesis method when the radar receives the signals and shows a higher accuracy than the regular method through formulation and the experiment results.
Journal ArticleDOI
Angle-range-polarization-dependent beamforming for polarization sensitive frequency diverse array
TL;DR: Numerical results demonstrate that the proposed PSFDA provides both range and polarization resolution as well as target angle estimation, and the proposed beamforming method can effectively null interferences, without degrading the array gain for the signals of interest.
Journal ArticleDOI
Multi‐domain collaborative filter for interference suppressing
TL;DR: A multi-domain collaborative oblique projection filter that has excellent performance when the difference is insignificant in each individual domain, whereas the performances of the single-domain-based filter and cascade filter degrade significantly.
References
More filters
Journal ArticleDOI
Matched subspace detectors
TL;DR: The generalized likelihood ratio (GLR) is the uniformly most powerful invariant detector and the utility of this finding is illustrated by solving a number of problems for detecting subspace signals in subspace interference and broadband noise.
Journal ArticleDOI
Signal processing applications of oblique projection operators
R.T. Behrens,Louis L. Scharf +1 more
TL;DR: The authors show how oblique projections can be used to separate signals from structured noise, damped or undamped interfering sinusoids, and narrow-band noise, and to interpolate missing data samples as a special case of removing impulse noise.
Journal ArticleDOI
MIMO Radar Space–Time Adaptive Processing Using Prolate Spheroidal Wave Functions
Chun-Yang Chen,P.P. Vaidyanathan +1 more
TL;DR: The clutter space and its rank in the MIMO radar are explored and by using the geometry of the problem rather than data, the clutter subspace can be represented using prolate spheroidal wave functions (PSWF) and a new STAP algorithm is proposed.
Journal ArticleDOI
Oblique Projections for Direction-of-Arrival Estimation With Prior Knowledge
Remy Boyer,Guillaume Bouleux +1 more
TL;DR: This paper derives and analyzes the Cramer-Rao bound associated with the MUSIC algorithm and shows that the proposed approach is able to almost completely cancel the influence of the known DOA on the unknown ones for block-diagonal source covariance and for sufficient signal-to-noise ratio (SNR).
Journal ArticleDOI
Blind adaptation of zero forcing projections and oblique pseudo-inverses for subspace detection and estimation when interference dominates noise
TL;DR: The results of this paper form a foundation for the rapid adaptation of receivers that are then used for detection and estimation in radar, sonar, and hyperspectral imaging and to data decoding in multiuser communication receivers.