Articles

Image retrieval by information fusion based on scalable vocabulary tree and robust Hausdorff distance

In recent years, Scalable Vocabulary Tree (SVT) has been shown to be effective in image retrieval. However, for general images where the foreground is the object to be recognized while the background is clutte...

Authors: Chang Che, Xiaoyang Yu, Xiaoming Sun and Boyang Yu

Design of robust high-order superdirectivity for circular arrays with sensor gain and phase errors

Though the high-order superdirectivity theory proposed in recent years is attractive, it is hard to implement in practice due to its poor robustness to small random array errors. Hence, in this paper, we prese...

Authors: Min Wang, Xiaochuan Ma, Ping Yang, Chengpeng Hao, Xiujuan Feng and Yue Zhang

Extended families of 2D arrays with near optimal auto and low cross-correlation

Families of 2D arrays can be constructed where each array has perfect autocorrelation, and the cross-correlation between any pair of family members is optimally low. We exploit equivalent Hadamard matrices to ...

Authors: I. D. Svalbe and A. Z. Tirkel

Erratum to: Unified LMI-based design of ΔΣ modulators

Authors: M. Rizwan Tariq and Shuichi Ohno

Biquaternion beamspace with its application to vector-sensor array direction findings and polarization estimations

In this paper, a biquaternion beamspace, constructed by projecting the original data of an electromagnetic vector-sensor array into a subspace of a lower dimension via a quaternion transformation matrix, is fi...

Authors: Dan Li, Feng Xu, Jing Fei Jiang and Jian Qiu Zhang

Adaptive reversible image watermarking algorithm based on IWT and level set

In order to improve the robustness, imperceptibility, and anti-malicious extraction capability of reversible image watermarking, an adaptive reversible image watermarking algorithm based on IWT and level set i...

Authors: Zhengwei Zhang, Lifa Wu, Shaozhang Xiao and Shangbing Gao

Robust adaptive monopulse algorithm based on main lobe constraints and subspace tracking

In continuous wave (CW) radar and high pulse repetition frequency pulse-Doppler (HPRF-PD) radar, the interference plus noise sample snapshots are hard to be obtained. The desired signal in the received snapsho...

Authors: Shuang Qiu, Xiaofeng Ma, Weixing Sheng, Yubing Han and Renli Zhang

Static force field representation of environments based on agents’ nonlinear motions

This paper presents a methodology that aims at the incremental representation of areas inside environments in terms of attractive forces. It is proposed a parametric representation of velocity fields ruling th...

Authors: Damian Campo, Alejandro Betancourt, Lucio Marcenaro and Carlo Regazzoni

Erratum to: Bandlimited graph signal reconstruction by diffusion operator

Authors: Lishan Yang, Kangyong You and Wenbin Guo

Multitarget tracking in cluttered environment for a multistatic passive radar system under the DAB/DVB network

The target tracking using multistatic passive radar in a digital audio/video broadcast (DAB/DVB) network with illuminators of opportunity faces two main challenges: the first challenge is that one has to solve...

Authors: Yi Fang Shi, Seung Hyo Park and Taek Lyul Song

SAR moving object imaging using sparsity imposing priors

Synthetic aperture radar (SAR) returns from a scene with motion can be viewed as data from a stationary scene, but with phase errors due to motion. Based on this perspective, we formulate the problem of SAR im...

Authors: N. Özben Önhon and Müjdat Çetin

Efficient filter design against interrupted sampling repeater jamming for wideband radar

Interrupted sampling repeater jamming (ISRJ) is an effective coherent jamming, which can induce false high-resolution range profile (HRRP) and image to greatly complicate the target detection and recognition o...

Authors: Wei Xiong, Gong Zhang and Wenbo Liu

Invertible update-then-predict integer lifting wavelet for lossless image compression

This paper presents a new wavelet family for lossless image compression by re-factoring the channel representation of the update-then-predict lifting wavelet, introduced by Claypoole, Davis, Sweldens and Baran...

Authors: Dong Chen, Yanjuan Li, Haiying Zhang and Wenpeng Gao

Object representation for multi-beam sonar image using local higher-order statistics

Multi-beam sonar imaging has been widely used in various underwater tasks such as object recognition and object tracking. Problems remain, however, when the sonar images are characterized by low signal-to-nois...

Authors: Haisen Li, Jue Gao, Weidong Du, Tian Zhou, Chao Xu and Baowei Chen

Target parameter estimation for spatial and temporal formulations in MIMO radars using compressive sensing

Conventional algorithms used for parameter estimation in colocated multiple-input-multiple-output (MIMO) radars require the inversion of the covariance matrix of the received spatial samples. In these algorith...

Authors: Hussain Ali, Sajid Ahmed, Tareq Y. Al-Naffouri, Mohammad S. Sharawi and Mohamed-S Alouini

A novel point cloud registration using 2D image features

Since a 3D scanner only captures a scene of a 3D object at a time, a 3D registration for multi-scene is the key issue of 3D modeling. This paper presents a novel and an efficient 3D registration method based o...

Authors: Chien-Chou Lin, Yen-Chou Tai, Jhong-Jin Lee and Yong-Sheng Chen

On a unified framework for linear nuisance parameters

Estimation problems in the presence of deterministic linear nuisance parameters arise in a variety of fields. To cope with those, three common methods are widely considered: (1) jointly estimating the paramete...

Authors: Yongchang Hu and Geert Leus

Sensitivity analysis of FBMC-based multi-cellular networks to synchronization errors and HPA nonlinearities

In this paper, we study the performance of asynchronous and nonlinear FBMC-based multi-cellular networks. The considered system includes a reference mobile perfectly synchronized with its reference base statio...

Authors: Brahim Elmaroud, Ahmed Faqihi and Driss Aboutajdine

Robust constrained waveform design for MIMO radar with uncertain steering vectors

This paper considers the robust waveform design of multiple-input multiple-output (MIMO) radar to enhance targets detection in the presence of signal-dependent interferences assuming the knowledge of steering ...

Authors: Xianxiang Yu, Guolong Cui, Marco Piezzo, Salvatore Iommelli and Lingjiang Kong

Null broadening adaptive beamforming based on covariance matrix reconstruction and similarity constraint

In this paper, a procedure for the null broadening algorithm design with respect to the nonstationary interference is proposed. In contrast to previous works, we first impose nulls toward the regions of the no...

Authors: Junhui Qian, Zishu He, Julan Xie and Yile Zhang

Unimodular sequence design under frequency hopping communication compatibility requirements

The integrated design for both radar and anonymous communication has drawn more attention recently since wireless communication system appeals to enhance security and reliability. Given the frequency hopping (...

Authors: Peng Ge, Guolong Cui, Lingjiang Kong and Jianyu Yang

A procedure to locate the eyelid position in noisy videokeratoscopic images

In this paper, we propose a new procedure to robustly determine the eyelid position in high-speed videokeratoscopic images. This knowledge is crucial in videokeratoscopy to study the effects of the eyelids on ...

Authors: Tim Schäck, Michael Muma, Weaam Alkhaldi and Abdelhak M. Zoubir

Robust mainlobe interference suppression for coherent interference environment

A mainlobe interference suppression method is proposed in this paper, which can still work when the signal of interest (SOI) is present in the training data. In this method, the iterative adaptive approach (IA...

Authors: Yasen Wang, Qinglong Bao and Zengping Chen

A novel sequential algorithm for clutter and direct signal cancellation in passive bistatic radars

Cancellation of clutter and multipath is an important problem in passive bistatic radars. Some important recent algorithms such as the ECA, the SCA and the ECA-B project the received signals onto a subspace or...

Authors: Farzad Ansari, Mohammad Reza Taban and Saeed Gazor

Fractional difference co-array perspective for wideband signal DOA estimation

In recent years, much attention has been focused on difference co-array perspective in DOA estimation field due to its ability to increase the degrees of freedom and to detect more sources than sensors. In thi...

Authors: Jian-Yan Liu, Yi-Long Lu, Yan-Mei Zhang and Wei-Jiang Wang

Reducing the PAPR in FBMC-OQAM systems with low-latency trellis-based SLM technique

Filter-bank multi-carrier (FBMC) modulations, and more specifically FBMC-offset quadrature amplitude modulation (OQAM), are seen as an interesting alternative to orthogonal frequency division multiplexing (OFD...

Authors: S.S. Krishna Chaitanya Bulusu, Hmaied Shaiek and Daniel Roviras

Identification of piecewise affine systems based on fuzzy PCA-guided robust clustering technique

Hybrid systems are a class of dynamical systems whose behaviors are based on the interaction between discrete and continuous dynamical behaviors. Since a general method for the analysis of hybrid systems is no...

Authors: Esmaeel Khanmirza, Milad Nazarahari and Alireza Mousavi

A hybrid passive localization method under strong interference with a preliminary experimental demonstration

Strong interference exists in many passive localization problems and may lead to the inefficacy of traditional localization methods. In this study, a hybrid passive localization method is proposed to address s...

Authors: Bo Lei, Yixin Yang, Kunde Yang, Yong Wang and Yang Shi

Power-efficient distributed resource allocation under goodput QoS constraints for heterogeneous networks

This work proposes a distributed resource allocation (RA) algorithm for packet bit-interleaved coded OFDM transmissions in the uplink of heterogeneous networks (HetNets), characterized by small cells deployed ...

Authors: Riccardo Andreotti, Paolo Del Fiorentino, Filippo Giannetti and Vincenzo Lottici

Robust group compressive sensing for DOA estimation with partially distorted observations

In this paper, we propose a robust direction-of-arrival (DOA) estimation algorithm based on group sparse reconstruction algorithm utilizing signals observed at multiple frequencies. The group sparse reconstruc...

Authors: Ben Wang, Yimin D. Zhang and Wei Wang

Fast implementation for modified adaptive multi-pulse compression

This paper deals with the estimation of range-Doppler plane in pulse Doppler radar system, accounting both for clutter-free scenario and clutter scenario. A modified adaptive multi-pulse compression (MAMPC) al...

Authors: Xianxiang Yu, Guolong Cui, Meifang Luo, Lingjiang Kong and Dan Ran

Computation-distributed probability hypothesis density filter

Particle probability hypothesis density filtering has become a promising approach for multi-target tracking due to its capability of handling an unknown and time-varying number of targets in a nonlinear, non-G...

Authors: Junjie Wang, Lingling Zhao, Xiaohong Su, Chunmei Shi and JiQuan Ma

Sub-Nyquist sampling and detection in Costas coded pulse compression radars

Modern pulse compression radar involves digital signal processing of high bandwidth pulses modulated with different coding schemes. One of the limiting factors in the radar’s design to achieve desired target r...

Authors: Adnan Hanif, Atif Bin Mansoor and Ali Shariq Imran

Range-azimuth decouple beamforming for frequency diverse array with Costas-sequence modulated frequency offsets

Different from the phased-array using the same carrier frequency for each transmit element, the frequency diverse array (FDA) uses a small frequency offset across the array elements to produce range-angle-depe...

Authors: Zhe Wang, Wen-Qin Wang and Huaizong Shao

Matched, mismatched, and robust scatter matrix estimation and hypothesis testing in complex t-distributed data

Scatter matrix estimation and hypothesis testing are fundamental inference problems in a wide variety of signal processing applications. In this paper, we investigate and compare the matched, mismatched, and r...

Authors: Stefano Fortunati, Fulvio Gini and Maria S. Greco

A smooth chaotic map with parameterized shape and symmetry

We introduce in this paper a new chaotic map with dynamical properties controlled by two free parameters. The map definition is based on the hyperbolic tangent function, so it is called the tanh map. We demons...

Authors: Daniel P.B. Chaves, Carlos E.C. Souza and Cecilio Pimentel

Spatial aliasing for efficient direction-of-arrival estimation based on steering vector reconstruction

A new technique is proposed to reduce the computational complexity of the multiple signal classification (MUSIC) algorithm for direction-of-arrival (DOA) estimate using a uniform linear array (ULA). The steeri...

Authors: Feng-Gang Yan, Bin Cao, Jia-Jia Rong, Yi Shen and Ming Jin

Bandlimited graph signal reconstruction by diffusion operator

Signal processing on graphs extends signal processing concepts and methodologies from the classical signal processing theory to data indexed by general graphs. For a bandlimited graph signal, the unknown data ...

Authors: Lishan Yang, Kangyong You and Wenbin Guo

Binary integration nonparametric detection for range-spread targets in distributed terahertz radar network under unknown clutter

In this study, to detect person-borne concealed threats in range profiles under the circumstance of unknown clutter, we propose a binary integration nonparametric detection method based on the generalized sign...

Authors: Tong Liu, Rui Min, Yiming Pi, Keyu Long and Zhongtao Huang

A reduced-rank approach for implementing higher-order Volterra filters

The use of Volterra filters in practical applications is often limited by their high computational burden. To cope with this problem, many strategies for implementing Volterra filters with reduced complexity h...

Authors: Eduardo L. O. Batista and Rui Seara

Optimization of a MIMO amplify-and- forward relay system with channel state information estimation error and feedback delay

This paper addresses the robust design of a multiple-input multiple-output amplify-and-forward relay system against channel state information (CSI) mismatch due to estimation error and feedback delay. The esti...

Authors: Ying Zhang, Danni Zhao, Huapeng Zhao, Yinjiang Chen and Ning Kang

Introducing oriented Laplacian diffusion into a variational decomposition model

The decomposition model proposed by Osher, Solé and Vese in 2003 (the OSV model) is known for its good denoising performance. This performance has been found to be due to its higher weighting of lower image fr...

Authors: Reza Shahidi and Cecilia Moloney

Range cell migration correction analysis of one-step and two-step motion compensation for millimeter-wave airborne SAR imaging

Conventional two-step motion compensation (MOCO) method is widely adapted for airborne synthetic aperture radar (SAR) imaging due to its conciseness combining with the SAR focusing procedure. For two-step MOCO...

Authors: Guanyong Wang, Lei Zhang, Jun Li and Qingrong Hu

Target detection in complex scene of SAR image based on existence probability

This study proposes a target detection approach based on the target existence probability in complex scenes of a synthetic aperture radar image. Superpixels are the basic unit throughout the approach and are l...

Authors: Shuo Liu, Zongjie Cao, Honggang Wu, Yiming Pi and Haiyi Yang

Significance-aware filtering for nonlinear acoustic echo cancellation

This article summarizes and extends the recently proposed concept of Significance-Aware (SA) filtering for nonlinear acoustic echo cancellation. The core idea of SA filtering is to decompose the estimation of ...

Authors: Christian Hofmann, Christian Huemmer, Michael Guenther and Walter Kellermann

Improved analysis of SP and CoSaMP under total perturbations

Practically, in the underdetermined model y=A x, where x is a K sparse vector (i.e., it has no more than K nonzero entries), both y and A could be totally perturbed. A more relaxed conditi...

Authors: Haifeng Li

Low probability of intercept-based adaptive radar waveform optimization in signal-dependent clutter for joint radar and cellular communication systems

In this paper, we investigate the problem of low probability of intercept (LPI)-based adaptive radar waveform optimization in signal-dependent clutter for joint radar and cellular communication systems, where ...

Authors: Chenguang Shi, Sana Salous, Fei Wang and Jianjiang Zhou

A residual range cell migration correction algorithm for bistatic forward-looking SAR

For bistatic forward-looking synthetic aperture radar (BFSAR), images are often blurred by uncompensated radar motion errors. To get refocused images, autofocus is a useful postprocessing technique. However, a...

Authors: Wei Pu, Yulin Huang, Junjie Wu, Jianyu Yang and Wenchao Li

Fast GNSS satellite signal acquisition method based on multiple resamplings

A fast Global Navigation Satellite System (GNSS) satellite signal acquisition method based on resampling is presented. In contrast to traditional approaches, which perform a single-round search with a high dat...

Authors: Yong Wang and Gang Mao

Multistatic adaptive CFAR detection in non-Gaussian clutter

This work addresses the problem of target detection for multistatic radars. We propose an algorithm that is able to keep constant the false alarm rate, when the disturbance samples associated with each receive...

Authors: Riccardo Palamà, Maria Greco and Fulvio Gini