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A search-free DOA estimation algorithm for coprime arrays [PDF]

Digital Signal Processing, 2014
Recently, coprime arrays have been in the focus of research because of their potential in exploiting redundancy in spanning large apertures with fewer elements than suggested by theory. A coprime array consists of two uniform linear subarrays with inter-element spacings $Mλ/2$ and $Nλ/2$, where $M$ and $N$ are coprime integers and $λ$ is the wavelength
Zhiyuan Weng, Petar M. Djuric
openaire   +2 more sources

DOA estimation of underwater acoustic co-frequency sources for the coprime vector sensor array

Frontiers in Marine Science, 2023
A coprime array with fewer sensors can achieve the same resolution as a uniform linear array. However, when detecting co-frequency targets, there can be prominent false alarms due to overlaps between the main and grating lobes of subarrays.
Xiao Chen, Hao Zhang, Hao Zhang, Yong Gao, Zhen Wang   +4 more
doaj   +1 more source

Generalized and symmetric coprime planar array for direction of arrival estimation

IET Radar, Sonar & Navigation, 2022
Degrees of freedom and mutual coupling are two important factors to determine the ability of direction of arrival (DOA) estimation. Although coprime planar array (CPPA) has less mutual coupling than hourglass array (HA) and ladder array (LA), its ...
Ming Jian Ren, Guoping Hu, Junpeng Shi, Hao Zhou   +3 more
doaj   +1 more source

Multiplepath Matching Pursuit Using a Random Virtual Array Set Construction and Validation Technology for Target Bearing Detection with an Underwater Vector Coprime Array

Journal of Marine Science and Engineering
The coprime array, proposed in recent years as a special type of sparse array, combines the advantages of sparse sensing with the unique properties of prime numbers, enabling a larger array aperture and higher degrees of freedom with the same number of ...
Xiao Chen, Ying Zhang, Yuan An, Zhen Wang   +3 more
doaj   +1 more source

A Transformed Coprime Array With Reduced Mutual Coupling for DOA Estimation of Non-Circular Signals

IEEE Access, 2021
Recently, the design of sparse linear array for direction of arrival (DOA) estimation of non-circular (NC) signals has attracted great attention because the difference and sum co-array offered by non-circularity increases the aperture of virtual linear ...
Fengtong Mei, Haiyun Xu, Weijia Cui, Bin Ba, Yinsheng Wang   +4 more
doaj   +1 more source

Frequency Shaping for Improving a Trade‐Off Between Control and Privacy Performance: Beyond Differential Privacy

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT In privacy protection of control systems, a trade‐off between control performance and privacy level is often pointed out. Our goal in this paper is to improve this trade‐off by shaping the frequency of noise added for privacy protection when the control objective is to track a reference signal, which is taken as a piece of information whose ...
Rintaro Watanabe, Yu Kawano, Nobutaka Wada, Ming Cao   +3 more
wiley   +1 more source

A Comprehensive Multistage Average Controller for Trajectory Tracking in Solar‐Powered Mobile Robots: Analysis of Actuator‐Driver and Power Stage Integration

International Journal of Mechanical System Dynamics, Volume 6, Issue 2, Page 224-246, June 2026.
ABSTRACT This work addresses the challenge of bidirectional trajectory tracking in solar‐powered wheeled mobile robots (WMRs), considering the mechanical structure, actuator‐driver, and power stage subsystems. Notably, this is the first study to explicitly model and control the actuator‐driver subsystem within this context. The proposed solution relies
Benjamin Natanael Santiago‐Nogales, Julio Cesar Ordaz‐Dehesa, Ramón Silva‐Ortigoza, Erik Reyes‐Reyes, J. Martín Alba‐Martínez, Juan Eduardo Velázquez‐Velázquez, José Rafael García‐Sánchez, Magdalena Marciano‐Melchor, Hind Taud   +8 more
wiley   +1 more source

Near-Field Localization With Coprime Array

Proceedings of the 30th Annual International Conference on Mobile Computing and Networking
Large-aperture coprime arrays (CAs) are expected to achieve higher sensing resolution than conventional dense arrays (DAs), yet with lower hardware and energy cost. However, existing CA far-field localization methods cannot be directly applied to near-field scenarios due to channel model mismatch.
Hongqiang Cheng, Changsheng You, Cong Zhou   +2 more
openaire   +2 more sources

Maximum number of zeroes of polynomials on weighted projective spaces over a finite field

Bulletin of the London Mathematical Society, Volume 58, Issue 6, June 2026.
Abstract We compute the maximum number of rational points at which a homogeneous polynomial can vanish on a weighted projective space over a finite field, provided that the first weight is equal to 1. This solves a conjecture by Aubry, Castryck, Ghorpade, Lachaud, O'Sullivan and Ram, which stated that a Serre‐like bound holds with equality for weighted
Jade Nardi, Rodrigo San‐José
wiley   +1 more source

Interpolation-Based Direction-of-Arrival Estimation for Coprime Arrays via Covariance Matrix Fitting

IEEE Access, 2020
Coprime arrays can highly increase degree-of-freedom (DOF) by exploiting the equivalent virtual signal. However, since the corresponding virtual array constructed by the coprime array is always a non-uniform linear array (non-ULA), most existing ...
Zhen Chen, Chongyi Fan, Xiaotao Huang
doaj   +1 more source