Feedback bit allocation in distributed antenna array systems by Shuai ZHANG, Peng PAN, Cui WANG

“…In a frequency division duplex communication system,precoding at the base station usually requires terminal feedback channel state information.In a distributed array system,the channel conditions between the terminal and different access nodes in the cell are different because multiple access nodes are arranged at different locations in the cell.When the resources for feedback channel state information are limited,the allocation method of feedback bit needs to be optimized to improve the overall performance of the system.In a multi-user distributed array system,an access node selection method based on distance threshold was adopted.Based on this method,the quantization characteristics of the random vector quantization codebook and the Taylor expansion method were used to derive the system quantization capacity loss,and then an approximate expression was given.Based on this expression,a feedback bit allocation method was proposed.Compared with other allocation methods,the method of this paper was more universal because it did not limit the number of access nodes selected by the user.The simulation results show that the strategy proposed is superior to the traditional equal-bit allocation scheme and can obtain better performance when the feedback resources are limited.…”
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Advancements in PV Array Reconfiguration Techniques: Review Article by Marium Jalal, Ihsan Ullah Khalil, Azhar Ul Haq, Aymen Flah, Saad A. Mohamed Abdel Wahab

“…This research work serves as an interesting reference for researchers, industry, and PV practitioners, offering comparisons in terms of the factors mentioned above that aid in the promising selection of PV array reconfiguration techniques under certain specific circumstances.…”
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Monitoring of coordinates for modules of unrigged phased antenna array by A. V. Poltavskiy

“…Coherent method for realizing of the device for modules-units start monitoring of phased antenna array is suggested. Application area of the coherent method includes radar systems with improved special selectivity within systems for the detection of poorly-observable objects and for monitoring the environment of advanced multi-functional pilotless flying apparatuses. …”
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Research of ZCZ array pair and its construction methods by GAO Jun-ping1, LI Qi2, DAI Ju-feng1, LIU Li2

“…Based on perfect array pair and orthogonal matrix, ZCZ array pairs set with certain vol-ume, family size and zero correlation zone can be synthesized through row or column interleaved technique when suitable shift sequences are selected. …”
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A Study of Directional Patterns of Ultrasonic Parametric Array by Denis Sergeevich RAKOV, Aleksandr S. RAKOV, Andrey N. KUDRYAVTSEV, Nikolay P. KRASNENKO, Yury A. CHURSIN, Maksim A. MURIN

“…The paper presents results of numerical calculations and experimental data on the directional pattern of two 38-element parametric arrays composed of ultrasound sources. Two types of antenna arrays are considered, namely with parallel and coaxial connections of ultrasonic transducers (elements). …”
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Series-Fed Microstrip Array Antenna with Circular Polarization by Tuan-Yung Han

“…The proposed design uses a simple series-fed network to increase the CP bandwidth without requiring one-by-one adjustment of each array element or a complex feed network. Selecting the appropriate spacing between each array element allows the proposed array antenna to generate CP radiation with a low axial ratio. …”
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Optimization of Sparse Concentric Ring Arrays for Low Sidelobe by Kesong Chen, Yafei Li, Jiajia Shi

“…To lower the peak sidelobe level (PSLL) of sparse concentric ring arrays, a method with multiple design constraints that embed a function model into modified real genetic algorithm (MGA) and select the grid ring radii as optimization individual to synthesize sparse concentric ring arrays is proposed. …”
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Efficiency of the Miniature Anti-jam GNSS Antenna Array by A. V. Nemov, D. A. Nemov, D. L. Minh, S. A. Saveliev, A. N. Plastikov

“…Such types of AC used for intelligent control of spatial selectivity are considered as antenna arrays. The advantages of miniature CRPAs with anti-jamming capability include possibility to be installed on vehicles where it used to be impossible due to their size. …”
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Extensile FSS With Controllable Passband Frequency for EM Transparent Antenna by Xiao-Fan Wang, Ling-Ling Yang, Wen-Wen Yang, Jian-Xin Chen

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Design and Prototype of a Solar Array Malfunction Identification System. by Wabuyi, Richard

“…This report introduces the design and prototype of a Solar Array Malfunction Identification System (SAMIS), developed to enhance the reliability and efficiency of solar installations. …”
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Spatial Filtering of Signals under Imprecise Calibration of Antenna Arrays by M. E. Shevchenko, V. N. Malyshev, A. V. Gorovoy, A. S. Cherepanov

“…Spatial filtering of signals is performed for the selection the signals of interest when the signals spectra overlap. …”
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Optimized Driver Placement for Array-Driven Flat-Panel Loudspeakers by David A. ANDERSON, Michael C. HEILEMANN, Mark F. BOCKO

“…The recently demonstrated ‘modal crossover network’ method for flat panel loudspeaker tuning employs an array of force drivers to selectively excite one or more panel bending modes from a spectrum of panel bending modes. …”
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Integrated Filtering Microstrip Duplex Antenna Array with High Isolation by Xian-Jing Lin, Ze-Ming Xie, Pei-Sheng Zhang

“…This paper presents a 2 × 1 integrated filtering microstrip duplex antenna array with high isolation and same polarization. …”
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A Wideband Tightly Coupled Array for Omnidirectional Pattern Synthesis by Manuel Luciarini, Domenico Gaetano, Christian Canestri, Cosmo Mitrano, Walter Fuscaldo, Alessandro Galli

“…The capacitive coupling between neighbouring elements and the implementation of a properly designed frequency selective surface allow for increasing the electrical length of each antenna while compensating for the inductive effect of the metallic mast, according to the tightly coupled and connected arrays theory. …”
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Analysis of phenotype array data from Biolog MicroPlates™ by John Bissett, Carol Ann Nolan

“…Several research applications of the Biolog system are presented: i) “monophenetic groups” from cluster analyses of phenotype array data are investigated for previously undetected new species in Trichoderma, ii) metabolic characters differentiating species are identified, and multivariate analyses performed to complement molecular data in validating new species and significant variants, and iii) phenotype array data for more than 1200 Trichoderma strains are analysed to select strains that might be exploited for bioconversions and commercial production of enzymes. …”
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Research and Modeling of Mechanical Crosstalk in Linear Arrays of Ultrasonic Transducers by Mateusz CELMER, Krzysztof J. OPIELIŃSKI

“…This paper studies the manner of propagation of mechanical crosstalk in the designed model of a linear array of ultrasonic transducers on the basis of unwanted signals, which appeared on elementary piezoelectric transducers when power is supplied to the selected transducer in the array. …”
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Integral ecology approach to life cycle assessment of solar arrays by Charles E. Sprouse, III

“…Recognizing that practical limitations make it impossible to provide a full methodological basis for evaluating every aspect of an integral ecology LCA, the article focuses on introducing the integral ecology LCA concept and selectively utilizes illustrative examples for a ∼1 MW scale photovoltaic solar array. …”
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Novel Sequential Detection of NO₂ and C₂H₅OH in SnO₂ MEMS Arrays for Enhanced Selectivity in E-Nose Applications by Mahaboobbatcha Aleem, Yilu Zhou, Swati Deswal, Bongmook Lee, Veena Misra

“…This study explores the surface chemistry and electrical responses of ultra-high-sensitivity SnO₂ MEMS arrays to enable a novel sequential detection methodology for detecting nitrogen dioxide (NO₂) and ethanol (C₂H₅OH) as a route to achieve selective gas sensing in electronic nose (E-nose) applications. …”
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Transmitarrays for Wireless Power Transfer on Earth and in Space by Jesse Brunet, Alex Ayling, Ali Hajimiri

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Effect of Near-Field Diffraction in Photolithography of Hexagonal Arrays for Dichroic Filters by Shaolin Zhou, Junbo Liu, Qian Deng, Changqing Xie, Mansun Chan

“…Dichroic filters with the hexagonal lattice of circular holes are used as fundamental devices for frequency selection from the infrared to the terahertz (THz) region. …”
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