Results 1 to 10 of about 2,905,339 (291)

Energy-efficient multi-cell resource allocation in cognitive radio-enabled 5G systems

open access: yesEURASIP Journal on Advances in Signal Processing, 2019
In this paper, we propose an energy-efficient resource allocation (RA) algorithm in cognitive radio-enabled 5th generation (5G) systems, where the scenario including one primary system and multiple secondary cells is considered.
Hengwei Lv   +3 more
doaj   +1 more source

Fast ship contour extraction in SAR images

open access: yesThe Journal of Engineering, 2019
Fast ship contour extraction in synthetic aperture radar (SAR) images plays an important role in sea surface surveillance. Ship contours and sizes and shapes extracted from them are salient features in ship classification and recognition.
Yuan-Ying Nie   +2 more
doaj   +1 more source

A high maneuvering dim target detection algorithm based on non-uniform sub-aperture division and hybrid accumulation

open access: yesXibei Gongye Daxue Xuebao
The motion state of highly maneuverable small target is complex, with weak scattering energy and difficulty in maintaining signal coherence over long integration time, resulting in ineffective accumulation of target echo signal.
LI Jiajia   +3 more
doaj   +1 more source

Rain Clutter Modelling and Performance Assessment of Road Traffic Surveillance Radars

open access: yesIET Radar, Sonar & Navigation
Millimetre‐wave road traffic surveillance radars are used for vehicle detection and tracking. Under rainy conditions, rain attenuation and rain backscatter severely degrade the vehicle detection performance of radars.
Hai‐Long Su   +5 more
doaj   +1 more source

A Novel Multi-Angle SAR Imaging System and Method Based on an Ultrahigh Speed Platform

open access: yesSensors, 2019
Considering the difficulty of pulse repetition frequency (PRF) design in multi-angle SAR when using ultra-high speed platforms, a multi-angle SAR imaging system in a unified coordinate system is proposed.
Wensheng Chang   +4 more
doaj   +1 more source

Uniform attribute-content model

open access: yesThe Journal of Engineering, 2019
There have been growing needs for text processing, such as classifying, retrieving and clustering. The foundation of such a process is to extract features, which can best describe the text. Great progress has been made in text modelling. However, most of
Yingzhuo Xiang   +4 more
doaj   +1 more source

An Efficient Signal Reconstruction Algorithm for Stepped Frequency MIMO-SAR in the Spotlight and Sliding Spotlight Modes

open access: yesInternational Journal of Antennas and Propagation, 2014
Multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) using stepped frequency (SF) waveforms enables a high two-dimensional (2D) resolution with wider imaging swath at relatively low cost. However, only the stripmap mode has been discussed
Jiajia Zhang   +4 more
doaj   +1 more source

Distributed Resource Scheduling Based on Potential Game in Dense Cellular Network

open access: yesIEEE Access, 2018
Based on a potential game model, a distributed resource scheduling scheme is proposed to coordinate severe interference in a dense cellular network. First, the subcarrier and power scheduling problem is modeled as a non-cooperative potential game.
Zhiqiang Qi, Tao Peng, Wenbo Wang
doaj   +1 more source

Performance Analysis of Oblique Projection Filtering Based on Polarization Sensitive Array

open access: yesLeida xuebao, 2013
The output SINR (Signal to Interference and Noise Ratio) of oblique projection and orthogonal projection filtering based on polarization sensitive array is investigated.
Tian Jing, Liao Gui-sheng, Yang Zhi-wei
doaj   +1 more source

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