Results 111 to 120 of about 82,705 (221)

Characterization of Near‐Surface Velocity Structure at Haast, New Zealand, Using Distributed Acoustic Sensing (DAS) Measurements of Seismicity

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Distributed acoustic Sensing (DAS) data collected along a 30 km length of telecommunications fiber crossing the Alpine Fault near Haast enable analysis of interactions between fluvioglacial and seismotectonic processes. Here we use DAS recordings of 25 earthquakes to probe near‐surface structure beneath the Haast river valley.
Allan Raudsepp, Calum J. Chamberlain, Voon Hui Lai, Meghan S. Miller, John Townend   +4 more
wiley   +1 more source

Multi-mode single sideband time modulation harmonic adaptive beamforming

Zhongguo Jianchuan Yanjiu
ObjectiveThis study proposes an innovative beamforming method to achieve high-efficiency harmonic adaptive beamforming through multi-mode single sideband time modulation technology.MethodA multi-mode single sideband time modulation module containing ...
Tao YANG, Xiaonan ZHAO, Zhenji LIU, Tingting FAN, Liu YANG, Yu XIA, Jingfeng CHEN   +6 more
doaj   +1 more source

Time Modulated Arrays Beamforming for Non-Terrestrial Network User Terminal

IEEE Open Journal of the Communications Society
Though beamforming is the fundamental element of satellite communication, it incurs costs, complexity, and power consumption. In this paper, we study a Time-Modulated Array (TMA) beamforming design on the Non-Terrestrial Network (NTN) User Terminal (UT ...
Gebrehiwet Gebrekrstos Lema, Eva Lagunas, M. R. Bhavani Shankar, Joel Grotz   +3 more
doaj   +1 more source

2D Pre-Beamforming Control Method via Analog Radio Over Fiber for Wireless Communication Systems With Massive Planar Array Antenna

IEEE Access
To rapidly deploy large capacity wireless communication services using high frequency bands, a system is being considered that use radio-over-fiber (RoF) technology to separate the wireless base station function into a central station (CS) with signal ...
Mizuki Suga, Yuta Takahashi, Yasuyoshi Yamamoto, Hideki Toshinaga, Naoki Kita, Takeshi Onizawa   +5 more
doaj   +1 more source

A novel deconvolution beamforming algorithm for virtual phased arrays

, 2013
Beamforming techniques using phased microphone arrays are one of the most common tools for localizing and quantifying noise sources. However, the use of such devices can result in a series of well-known disadvantages regarding, for instance, their very ...
Fernandez Comesana, Daniel, Fernandez Grande, Efren, Holland, Keith R., Tiana Roig, Elisabet   +3 more
core  

Joint temporal-spatial reference beamforming: EIG beamforming

, 2010
Traditional methods for beamforming can be grouped in two families, the time reference beamformer and the spatial reference beamforming. Nevertheless, the increasing demand on receivers for location systems and high bandwidth over frequency selective fading able to properly manage multipath and co-channel interference motivates the need for versatile ...
Lagunas Hernandez, Miguel A., Pérez Neira, Ana Isabel, Vázquez, Miguel Ángel   +2 more
openaire   +1 more source

A review on underwater beamforming: Techniques, challenges, and future directions

Journal of Ocean Engineering and Science
This paper comprehensively reviews recent advancements in Underwater Beamforming (UWB) systems, highlighting its pivotal role in underwater communication, sensing, and environmental monitoring.
Ruba Zaheer, Quoc Viet Phung, Iftekhar Ahmad, Asma Aziz, Daryoush Habibi, Yue Rong, Walid K Hasan   +6 more
doaj   +1 more source

Ultrasound Computed Tomography Reflection Imaging with Coherence-Factor Beamforming for Breast Tumor Early Detection

Mathematics
Breast cancer is a global health concern, emphasizing the need for early detection. However, current mammography struggles to effectively image dense breasts.
Zuoxun Hou, Ruichen Yuan, Zihao Wang, Xiaorui Wei, Chujian Ren, Jiale Zhou, Xiaolei Qu   +6 more
doaj   +1 more source

Graph Neural Network-Based Unified Beamforming and User Selection for MU-MISO

IEEE Access
Classical beamforming algorithms face challenges such as increased complexity with more users and base station antennas (BSAs), as well as the requirement of accurate channel state information (CSI).
Wooseok Woo, Soyoung Han, Jae Hyun Seo, Hosung Park   +3 more
doaj   +1 more source

Robust Beamforming Technologies for Conformal Array of Small-Scale Platform Based on Covariance Matrix Fitting

水下无人系统学报
To achieve robust detection on small-scale platforms like unmanned undersea vehicles(UUVs), which are characterized by their limited maneuverability and array apertures, various beamforming algorithms were designed by leveraging U-shaped conformal planar
Shiyu GONG, Erzheng FANG, Jianing ZHANG
doaj   +1 more source