Results 61 to 70 of about 281 (164)
The Analysis of Using Spatial Smoothing for DOA Estimation of Coherent Signals in Sparse Arrays
International Journal of Antennas and Propagation, 2021 When there is coexistence of uncorrelated and coherent signals in sparse arrays, the conventional algorithms for direction-of-arrival (DOA) estimation using difference coarray fail.
Haiyun Xu +4 more
doaj +1 more source
International Journal of Antennas and Propagation, Volume 2025, Issue 1, 2025.Recently, symmetric sparse uniform linear arrays (SSULAs) have been widely used for mixed far‐field (FF) and near‐field (NF) source localization owing to their high degrees of freedom and large array aperture. However, the heavy levels of mutual coupling of SSULAs limit the accuracy of source localization.
Yiming Guo +5 more
wiley +1 more source
Sparse Array for Beamforming in Wireless Communication Systems
Journal of Engineering, Volume 2025, Issue 1, 2025.The usefulness of smart antennas lies in enhancing the received signal from a particular direction while suppressing unwanted interfering signals and noise from other directions. This process is known as beamforming. In this paper, we study beamforming using different antenna array geometries to improve performance.
Oscar Ossa-Molina +3 more
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 18, Issue 12, Page 2726-2736, December 2024.Our study introduces a non‐circular coherent signal direction‐finding method that effectively addresses array aperture loss in mainstream direction of arrival (DOA) estimation algorithms. By utilising covariance matrix information and employing techniques such as eigenvalue decomposition and nuclear norm minimisation, our approach enhances ...
Zihan Shen +3 more
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 18, Issue 6, Page 866-875, June 2024.In order to alleviate mutual coupling, a coprime linear array using three ULAs (CLA‐U3) is proposed. The expression of sensor locations is given, and the analysis of DOF is considered. The minimum subarray inter‐element spacing in CLA‐U3 is bigger than that of the existing arrays, which means that CLA‐U3 can be less sensitive to mutual coupling ...
Jin Zhang +4 more
wiley +1 more source
A Multi-Layer Concept for Coprime Array to Estimate Direction of Arrival
, 2022 Coprime arrays have holes in the difference coarray, which significantly degrade the performance of the coarray-based estimators. In this paper, we propose a multi-layer concept to fill the holes and resultantly improve the direction of arrival (DOA ...
Jianfeng Li (12555539) +4 more
core +1 more source
Extension of Nested Arrays with the Fourth-Order Difference Co-Array Enhancement [PDF]
, 2016 To reach a higher number of degrees of freedom by exploiting the fourth-order difference co-array concept, an effective structure extension based on two-level nested arrays is proposed.
Qing Shen +7 more
core +1 more source
Improved Coprime Linear Array Configuration for Moving Platform in DOA Estimation
, 2021 International audienceMoving platform based coprime linear arrays(CLAs) have been studied in recent years. It is shown that byshifting a CLA a half wavelength, the resulting difference coarraycan be regarded as the union of the difference coarray of ...
Wang, Yide, Chargé, Pascal, Yang, Xiao
core +1 more source
Fourier-Based Methods for Passive Sensing and Imaging [PDF]
, 2022 Sensor arrays play an instrumental role in a variety of applications, including radar, sonar, radio astronomy, and wireless communications. Employing an array of sensors permits direction-of-arrival (DOA) estimation, interference suppression, and imaging
Mills, Kenneth Ralph
core +1 more source
A novel method to construct low redundancy difference coarray on moving platform
Electronics Letters, 2022 Abstract A novel method to construct low redundancy difference coarray for direction‐of‐arrival (DOA) estimation on a moving platform is proposed by exploiting the fractal theory. The proposed method can be used in the scenario of a long period of stationary signal environment.
openaire +1 more source