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Parametric Adaptive Radar Detector with Enhanced Mismatched Signals Rejection Capabilities

Chengpeng Hao, Bin Liu, Shefeng Yan, Long Cai
2010 EURASIP Journal on Advances in Signal Processing  
At the analysis stage, the performance of the new receiver is assessed and compared with several traditional adaptive detectors.  ...  Further, we develop two two-stage detectors, one of which consists of an adaptive matched filter (AMF) followed by the aforementioned detector, and the other is obtained by cascading a GLRT-based Subspace  ...  This work was supported by the National Natural Science Foundation of China under Grant no. 60802072.  ... 
doi:10.1155/2010/375136 fatcat:re64rxxjz5fhxlu6ib56dsattm

An Improved Adaptive Sidelobe Blanker

F. Bandiera, O. Besson, D. Orlando, G. Ricci
2008 IEEE Transactions on Signal Processing  
We propose a two-stage detector consisting of a subspace detector followed by the whitened adaptive beamformer orthogonal rejection test.  ...  values with respect to previously proposed two-stage detectors.  ...  Moreover, in [21] , a two-stage detector obtained cascading a RAO test to the AMF has been proposed and assessed.  ... 
doi:10.1109/tsp.2008.926191 fatcat:otq3lxlyi5dsln6fjazxkz4fpu

Multichannel adaptive signal detection: Basic theory and literature review [article]

Weijian Liu, Jun Liu, Chengpeng Hao, Yongchan Gao, Yong-Liang Wang
2021 arXiv   pre-print
Filtering is not needed as a processing procedure either, since the function of filtering is embedded in the adaptive detector.  ...  In this paper we give a tutorial overview of multichannel adaptive signal detection, with emphasis on Gaussian background.  ...  In [139] , a two-stage detector, called SD-RAO was proposed, which cascades the SGLRT and DMRao. The above two-stage detectors were all designed for rank-one signals.  ... 
arXiv:2102.03474v1 fatcat:iqj2pbyrhvam3apfsnnecljynq

NSCT Domain Additive Watermark Detection Using RAO Hypothesis Test and Cauchy Distribution

Hongbo Bi, Ying Liu, Mengmeng Wu, Yanliang Ge
2016 Mathematical Problems in Engineering  
Secondly, a blind RAO test watermark detector was derived in the NSCT domain, which does not need the knowledge of embedding strength at the receiving end.  ...  We presented a RAO hypothesis detector by modeling Cauchy distribution for the Nonsubsampled Contourlet Transform (NSCT) subband coefficients in the field of additive spread spectrum image watermarking  ...  It is seen that the RAO detector with Cauchy distribution yields a performance which is much better than others as evidenced by a lower probability of miss for any given value of false alarm.  ... 
doi:10.1155/2016/4065215 fatcat:k4266kwiy5g2xirveh3yacjrwm

A Sparse Learning Approach to the Design of Radar Tunable Architectures with Enhanced Selectivity Properties [article]

Sudan Han, Luca Pallotta, Xiaotao Huang, Gaetano Giunta, Danilo Orlando
2020 arXiv   pre-print
At the analysis stage, the performance of the newly proposed detectors is assessed also in comparison with existing selective competitors.  ...  The results show that the new detectors can outperform the considered counterparts in terms of rejection of unwanted signals, while retaining reasonable detection performance of matched signals.  ...  A. De Maio for the exciting and interesting discussions.  ... 
arXiv:2004.13164v1 fatcat:tbpe24pntvbpxhmlwykx5tucci

A Wald test with enhanced selectivity properties in homogeneous environments

Weijian Liu, Wenchong Xie, Yongliang Wang
2013 EURASIP Journal on Advances in Signal Processing  
At the design stage, we assume that the cell under test contains a noise-like interferer in addition to colored noise and possible signal of interest.  ...  We show that the Wald test is equivalent to a recently proposed Rao test. We also observe that this Rao/Wald test possesses constant false alarm rate property in homogeneous environments.  ...  Acknowledgments This work is supported in part by the National Natural Science Foundations of China under Grants No. 61102169 and 60925005.  ... 
doi:10.1186/1687-6180-2013-14 fatcat:gzs2tygmcndmxjixuue6cpsi4i

Robust additive watermarking in the DTCWT domain based on perceptual masking

Khalil Zebbiche, Fouad Khelifi, Khaled Loukhaoukha
2018 Multimedia tools and applications  
The system takes advantage of a new perceptual masking model that exploits the Human Visual System (HVS) characteristics at the embedding stage.  ...  It also uses an efficient watermark detection structure, called the Rao-test, to verify the presence of the candidate watermark.  ...  At the watermark detection stage, we have introduced and adapted a well known watermark detector, which is based on the Rao-Test.  ... 
doi:10.1007/s11042-017-5451-x fatcat:yfqgromaqzh2zeicvzlpifatve

Quantum limit for two-dimensional resolution of two incoherent optical point sources

Shan Zheng Ang, Ranjith Nair, Mankei Tsang
2017 Physical Review A  
We obtain the multiple-parameter quantum Cramér-Rao bound for estimating the transverse Cartesian components of the centroid and separation of two incoherent optical point sources using an imaging system  ...  The other method using fiber coupling can in principle attain the bound regardless of the distance between the two sources.  ...  MONTE-CARLO ANALYSIS OF SLIVER AND SPADE To demonstrate that the two schemes can perform as predicted by their Cramér-Rao bounds, we study Monte-Carlo simulations of the mean-square error (MSE) for SLIVER  ... 
doi:10.1103/physreva.95.063847 fatcat:a6osg5sjcrdxva4ulvmjsk7gly

Lightweight Detection of Additive Watermarking in the DWT-Domain

Roland Kwitt, Peter Meerwald, Andreas Uhl
2011 IEEE Transactions on Image Processing  
As a crucial point of our work we take a closer look at the computational requirements of watermark detectors.  ...  We focus on two host signal noise models and two types of hypothesis tests for watermark detection.  ...  given bŷ Fig. 4 shows a comparison of the LRT-C and Rao-C detector performance as a function of the γ parameter for the six test images of Fig. 3 for P f = 10 −6 .  ... 
doi:10.1109/tip.2010.2064327 pmid:20699210 fatcat:7ttwvpnmfzay3oxor3xwmaneoy

Blind DT-CWT domain additive spread-spectrum watermark detection

Roland Kwitt, Peter Meerwald, Andreas Uhl
2009 2009 16th International Conference on Digital Signal Processing  
can be exploited for better detector performance.  ...  We found that the Rao detector is more practical than the likelihoodratio test for our detection problem.  ...  Therefore, we will perform the detection performance analysis under attacks with this fixed shape parameter β = 1.  ... 
doi:10.1109/icdsp.2009.5201255 fatcat:ptqywoknurb3ngyviuuov2kpxm

Phase Estimation via Quantum Interferometry for Noisy Detectors

Nicolò Spagnolo, Chiara Vitelli, Vito Giovanni Lucivero, Vittorio Giovannetti, Lorenzo Maccone, Fabio Sciarrino
2012 Physical Review Letters  
Here we detail an experiment that can reach the latter even in the presence of imperfect detectors: it employs a phase-sensitive amplification of the signals after the phase sensing, before the detection  ...  We experimentally demonstrated the feasibility of a phase estimation experiment able to reach its optimal working regime.  ...  -We discuss a strategy for phase estimation in the presence of noisy detectors that can reach the performance of a lossless probe.  ... 
doi:10.1103/physrevlett.108.233602 pmid:23003955 fatcat:utt53kcgf5f6rex2q4i626s7d4

A Clustering Based Approach for Automatic Image Segmentation: An Application to Biplane Ventriculograms [chapter]

Antonio Bravo, Rubén Medina, J. Arelis Díaz
2006 Lecture Notes in Computer Science  
This intermediate result is used as input to a clustering algorithm, which is based on a region growing technique. The clustering algorithm is a two stage process.  ...  In the first stage an initial segmentation is achieved using as input the result of the linear regression and the smoothed version of the input image.  ...  Acknowledgment The authors would like to thank the Investigation Dean's Office of Universidad Nacional Experimental del Táchira (San Cristóbal, Venezuela) and CDCHT from Universidad de Los Andes (Mérida  ... 
doi:10.1007/11892755_32 fatcat:i3orjauzdbb4hms5d6js4lh3de

Interfering Channel Estimation in Radar-Cellular Coexistence: How Much Information Do We Need? [article]

Fan Liu, Adrian Garcia-Rodriguez, Christos Masouros, Giovanni Geraci
2018 arXiv   pre-print
through a variety of channel estimation schemes.  ...  Based on the statistical theory, we analyze the theoretical performance of both the hypothesis testing and the channel estimation methods.  ...  , which validates our performance analysis of (50) and (57) in Sec.  ... 
arXiv:1807.04000v2 fatcat:yrtaddoaczbfbcdpva4otfnhym

Interfering Channel Estimation for Radar and Communication Coexistence

Fan Liu, Adrian Garcia-Rodriguez, Christos Masouros, Giovanni Geraci
2019 2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)  
We therefore propose a Rao test approach to firstly identify the working mode of the radar, and then estimate the channel. We further provide theoretical performance analysis for the Rao detector.  ...  We investigate the interfering channel estimation in radar and communication coexistence, where a multi-input-multioutput (MIMO) radar is operated in a "search and track" mode, and a MIMO base station  ...  Closed-form Expression of the Rao Detector To analyze the performance of the proposed approach, it is necessary to derive the closed-form expression of the Rao detector.  ... 
doi:10.1109/spawc.2019.8815575 dblp:conf/spawc/0005GMG19 fatcat:gvtambo4i5fbzlw6qaiscagihi

Hyperspectral imagery: clutter adaptation in anomaly detection

S.M. Schweizer, J.M.F. Moura
2000 IEEE Transactions on Information Theory  
The major focus of the paper is on the adaptive stage of the detector, i.e., the estimation of the Gauss-Markov random field parameters.  ...  Its performance compares very favorably with that of the RX algorithm, an alternative detector commonly used with multispectral data, while reducing by up to an order of magnitude the associated computational  ...  Finally, the authors acknowledge the careful reading and suggestions of three anonymous reviewers and of Prof. Joseph A. O'Sullivan.  ... 
doi:10.1109/18.857796 fatcat:7tbbp2x2brbjnhjj6qeulo6rii
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