Results 41 to 50 of about 272,983 (328)

Geometrically-Inspired Sparse MIMO Array Design for Enhanced mm-Wave Near-Field Imaging

IEEE Access
In this paper, an efficient method of sparse MIMO array design is proposed to enhance the millimeter-wave near-field imaging by utilizing the geometric properties of the virtual array with uniform coverage of two-dimensional aperture and the minimal ...
Li Ding, Wenlong Yang, Gaoming Tang, Haipo Cui, Ping Li   +4 more
doaj   +1 more source

Design and Experiment of Multi-resolution Composite Digital Array Antenna

Leida xuebao, 2016
Because a sparse array has the advantages of a simplified structure and reduced cost in a radar system, radar technology based on the sparse array has gained widespread attention.
Tang Yue, Mao Tian, Jiang Bing
doaj   +1 more source

Passive localisation of mixed near‐field and far‐field signals using the transformed symmetric nested array

IET Radar, Sonar & Navigation, 2023
Direction of arrival (DOA) estimation of mixed near‐field (NF) and far‐field (FF) signals is one of the key issues in the study of array signal processing. For more precise localisation performance, sparse arrays have drawn the attention of an increasing
Bo Du, WeiJia Cui, Jianhui Wang, Bin Ba, Yinsheng Wang   +4 more
doaj   +1 more source

HAWC Upgrade for Multi-TeV {\gamma}-ray Detection

, 2016
The High Altitude Water Cherenkov (HAWC) high-energy {\gamma}-ray observatory was completed in march 2015 in central Mexico. The detector, consisting of 300 water tanks, is currently being upgraded to improve its performance at Multi-TeV energies, with a
Jardin-Blicq, Armelle, Joshi, Vikas
core   +1 more source

LOFAR Sparse Image Reconstruction [PDF]

, 2015
Context. The LOw Frequency ARray (LOFAR) radio telescope is a giant digital phased array interferometer with multiple antennas distributed in Europe. It provides discrete sets of Fourier components of the sky brightness.
Anderson, J., Avruch, I., Beck, R., Bentum, M., Best, P., Breitling, F., Broderick, J., Brüggen, M., Butcher, H., Ciardi, B., Corbel, S., de Gasperin, F., de Geus, E., de Vos, M., Duscha, S., Eislöffel, J., el, J., Engels, D., ey, V., ey-Pommier, M., Falcke, H., Fallows, R., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M., Garsden, H., Girard, J., Grießmeier, J., Gunst, A., Hassall, T., Heald, G., Hoeft, M., Hö,, Juette, E., Karastergiou, A., Kondratiev, V., Kramer, M., Kuniyoshi, M., Kuper, G., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J., Mulcahy, D., Munk, H., Norden, M., Orru, E., Paas, H., Pietka, G., Pizzo, R., Polatidis, A., Renting, A., Rowlinson, A., Röttgering, H., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B., Starck, J., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., Tasse, C., Thoudam, S., Toribio, C., van Amesfoort, A., van der Horst, A., van Weeren, R., Vermeulen, R., Vocks, C., Wijnholds, S., Wise, M., Woiselle, A., Wucknitz, O., Yatawatta, S., Zarka, P., Zensus, A.   +81 more
core   +4 more sources

Mutual coupling error modeling and correction of shared aperture interleaved sparse array antennas

Dianxin kexue, 2018
The shared aperture interleaved sparse array antenna is an effective way to implement a multi-function array antenna.The existing parameterized mutual coupling elimination methods are all developed for uniform array antennas.The mutual coupling matrix ...
Junming ZHUANG, Longjun LI
doaj   +2 more sources

Sparse Sensing with Semi-Coprime Arrays

, 2018
A semi-coprime array (SCA) interleaves two undersampled uniform linear arrays (ULAs) and a $Q$ element standard ULA. The undersampling factors of the first two arrays are $QM$ and $QN$ respectively where $M$ and $N$ are coprime. The resulting non-uniform
Adhikari, Kaushallya
core   +1 more source

Robust sparse image reconstruction of radio interferometric observations with purify [PDF]

, 2016
Next-generation radio interferometers, such as the Square Kilometre Array (SKA), will revolutionise our understanding of the universe through their unprecedented sensitivity and resolution.
Carrillo, Rafael E., d'Avezac, Mayeul, McEwen, Jason D., Onose, Alexandru, Pratley, Luke, Wiaux, Yves   +5 more
core   +4 more sources

Stochastic framework for evaluating the effect of displaced antenna elements on DOA estimation [PDF]

, 2017
We establish a statistical framework for investigating the influence of correlated random displacements of antenna elements in a uniform circular antenna array (UCA) on the distribution of direction-of-arrival (DOA) estimates. More specifically, we apply
Bruneel, Herwig, Inghelbrecht, Veronique, Moeneclaey, Marc, Rogier, Hendrik, Van Hecke, Tanja, Verhaevert, Jo   +5 more
core   +2 more sources

Evaluating Spatial Resolution and Channel Capacity of Sparse Cylindrical Arrays for Massive MIMO

IEEE Access, 2017
How to design antenna arrays plays an important role in wireless communications, especially when there are hundreds of antennas. In massive multiple-input and multiple-output (MIMO), if the number of antennas and RF chains are increasing, the channel ...
Na Wu, Fangqi Zhu, Qilian Liang
doaj   +1 more source