Results 21 to 30 of about 247,264 (281)

Double-component combined generalized weighted fractional Fourier transform based waveform design for massive MIMO

open access: yesTongxin xuebao, 2023
In order to overcome the drawback of conventional diversity technologies that sacrificing valuable communication resources such as data rate or bandwidth in massive multiple input multiple output (MIMO) systems, a double-component combined generalized ...
Xingjian LI   +5 more
doaj   +2 more sources

Waveform considerations in space-variant optical processors [PDF]

open access: yes, 1978
The use of coded waveforms in space-variant optical signal processors using coordinate transformations is considered. It is shown that nonlinear transmitted coded signals must be used with such a processor and that this results in novel waveform design ...
Casasent, David, Psaltis, Demetri
core   +1 more source

Towards Dual-functional Radar-Communication Systems: Optimal Waveform Design [PDF]

open access: yes, 2017
We focus on a dual-functional multi-input-multi-output (MIMO) radar-communication (RadCom) system, where a single transmitter communicates with downlink cellular users and detects radar targets simultaneously.
Li, Ang   +5 more
core   +2 more sources

A Survey of Collocated MIMO Radar

open access: yesLeida xuebao, 2022
As a novel radar system, the Multiple-Input Multiple-Output (MIMO) radar with waveform diversity has demonstrated excellent performance in several aspects, including target detection, parameter estimation, radio frequency stealth, and anti-jamming ...
Zishu HE   +6 more
doaj   +1 more source

Implementation of Pulse Radar Waveform Based on Software Radio Platform

open access: yesMATEC Web of Conferences, 2015
Based on the frequency and phase modulated signal, the authors design some commonly-used pulse radar baseband waveform, such as linear frequency modulated waveform, nonlinear frequency modulated waveform, Costas waveform, Barker coding waveform and multi-
Wang Dong, Dong Jian, Xiao Shunping
doaj   +1 more source

MIMO Radar Adaptive Waveform Design for Extended Target Recognition

open access: yesInternational Journal of Distributed Sensor Networks, 2015
The problems of multiple-input multiple-output (MIMO) radar adaptive waveform design in additive white Gaussian noise channels and multitarget recognition based on sequential likelihood ratio test are jointly addressed in this paper.
Lulu Wang   +3 more
doaj   +1 more source

Multi-Target Robust Waveform Design Based on Harmonic Variance and Mutual Information

open access: yesAdvances in Mathematical Physics, 2020
Cognitive radar is an intelligent radar system, and adaptive waveform design is one of the core problems in cognitive radar research. In the previous studies, it is assumed that the prior information of the target is known, and the definition of target ...
Bin Wang, Shuangqi Yu
doaj   +1 more source

Wirelessly Powered Backscatter Communications: Waveform Design and SNR-Energy Tradeoff [PDF]

open access: yes, 2017
This paper shows that wirelessly powered backscatter communications is subject to a fundamental tradeoff between the harvested energy at the tag and the reliability of the backscatter communication, measured in terms of SNR at the reader. Assuming the RF
Clerckx, Bruno   +2 more
core   +2 more sources

Signal and System Design for Wireless Power Transfer : Prototype, Experiment and Validation [PDF]

open access: yes, 2020
A new line of research on communications and signals design for Wireless Power Transfer (WPT) has recently emerged in the communication literature. Promising signal strategies to maximize the power transfer efficiency of WPT rely on (energy) beamforming,
Clerckx, Bruno   +2 more
core   +2 more sources

Enhanced Hybrid TIM-TDMA to Maximize the Total Throughput With Fairness Constraints

open access: yesIEEE Open Journal of the Communications Society
This paper addresses the problem of topological interference management (TIM) in ad hoc networks operating under a frequency-flat Rayleigh fading channel in single-input single-output (SISO). Assuming that the nodes have access to the statistical channel
David Jia   +3 more
doaj   +1 more source

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