Results 11 to 20 of about 43,612 (267)

RF Spectrum Sensing Based on an Overdamped Nonlinear Oscillator Ring for Cognitive Radios

Sensors, 2016
Existing spectrum-sensing techniques for cognitive radios require an analog-to-digital converter (ADC) to work at high dynamic range and a high sampling rate, resulting in high cost.
Zhi-Ling Tang, Si-Min Li, Li-Juan Yu
doaj   +1 more source

RESEARCH OF SOME PROPERTIES OF ALPHABETS BASED ON MUTUALLY ORTHOGONAL BROADBAND SIGNALS [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2019
The paper presents preliminary studies and analysis of some properties of alphabets built on the basis of the broadband signal symbols. We study the broadband signal alphabets characters and separate broadband signal symbols.
A. Y. Grishentsev, A. G. Korobeynikov, A. I. Elsukov   +2 more
doaj   +1 more source

Mathematical model of spatial and temporal processing of broadband signals in satellite radio systems of broadband access and radio navigation

Космические аппараты и технологии, 2023
To effectively receive a useful broadband signal, it is necessary to compensate for distortions caused by the complex frequency-dependent coefficient of the receiving and transmitting antenna, multiplicative interference and noise from the heterogeneity ...
A. N. Dementyev, A. N. Novikov, K. V. Arsenyev, A. N. Kurkin, А. O. Zhukov, I. N. Kartsan   +5 more
doaj   +1 more source

Feature Extraction and Reconstruction by Using 2D-VMD Based on Carrier-Free UWB Radar Application in Human Motion Recognition

Sensors, 2019
As the size of the radar hardware platform becomes smaller and smaller, the cost becomes lower and lower. The application of indoor radar-based human motion recognition has become a reality, which can be realized in a low-cost device with simple ...
Liubing Jiang, Xiaolong Zhou, Li Che, Shuwei Rong, Hexin Wen   +4 more
doaj   +1 more source

Author Correction: An Effective Way for Simulating Oceanic Turbulence Channel on the Beam Carrying Orbital Angular Momentum

Scientific Reports, 2020
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Sunxiang Pan, Le Wang, Wennai Wang, Shengmei Zhao   +3 more
doaj   +1 more source

Modulated Broadband Mode Decomposition for the Feature Extraction of Double Pulse Metal Inert Gas Welding

IEEE Access, 2020
A lot of adaptive signal decomposition methods have been applied for nonstationary DPMIG electrical signals as they are always affected by noise. Recently, to solve the problems of former methods caused by the Gibbs phenomenon and the calculation of ...
Yanfeng Peng, Zucheng Wang, Kuanfang He, Qingxian Li, Liangjiang Liu, Xianyu Zhu, Qinghua Lu, Yanfei Liu, Zhihua Peng   +8 more
doaj   +1 more source

Long Distance Broadband Fiber Optical Beamforming Over 120 km

IEEE Access, 2021
With the development of the space exploration and satellite communications, the data transmission at broadband and long distance are in increasing demand.
Jichen Qiu, Zhiwei Li, Xiaofeng Jin, Xianbin Yu, Shilie Zheng, Xianmin Zhang   +5 more
doaj   +1 more source

Refocusing of Ground Moving Targets with Doppler Ambiguity Using Keystone Transform and Modified Second-Order Keystone Transform for Synthetic Aperture Radar

Remote Sensing, 2021
Ground moving targets will typically be defocused because of the range migration (RM) and Doppler frequency migration (DFM) caused by the unknown relative motions between the platform of synthetic aperture radar (SAR) and the ground moving targets.
Jun Wan, Xiaoheng Tan, Zhanye Chen, Dong Li, Qinghua Liu, Yu Zhou, Linrang Zhang   +6 more
doaj   +1 more source

Signalling/IN Server architecture for a broadband SSP [PDF]

, 1998
This paper describes a Signalling/IN Server taking into account the adopted architectural and implementation solutions. The Signalling/IN Server takes part in a Broadband Service Switching Point realised in the framework of the European research project INSIGNIA (IN and B-ISDN Signalling Integration on ATM Platforms). The aim of the INSIGNIA project is
D. Blaiotta, S. Daneluzzi, Danilo Fava, D. Lento, M. Varisco   +4 more
openaire   +1 more source

Physical-Layer Security Analysis over M-Distributed Fading Channels

Entropy, 2019
In this paper, the physical layer security over the M-distributed fading channel is investigated. Initially, an exact expression of secrecy outage probability (SOP) is derived, which has an integral term. To get a closed-form expression, a lower bound of
Sheng-Hong Lin, Rong-Rong Lu, Xian-Tao Fu, An-Ling Tong, Jin-Yuan Wang   +4 more
doaj   +1 more source