Results 71 to 80 of about 363,353 (192)

On physical‐layer security for primary system in underlay cognitive radio networks

open access: yesIET Networks, 2018
In this study, the authors consider the physical‐layer security for transmission in underlay cognitive radio networks, where consisting of a primary source–destination pair, a secondary transmitter–receiver pair and a common eavesdropper (E). To transmit
Ping Xie   +5 more
doaj   +1 more source

Improved transmit beamforming design based on ADMM for low probability of intercept of FDA-MIMO radar

open access: yesTongxin xuebao, 2022
Considering the low probability of intercept problem that the signal-dependent interference and the target were located in the same angle, an improved transmit beamforming design based on the alternating direction method of multipliers (ADMM) was ...
Pengcheng GONG, Yuntao WU
doaj   +2 more sources

LPI Sequences Optimization Method against Summation Detector Based on FFT Filter Bank

open access: yesRemote Sensing
Waveform design is a crucial factor in electronic surveillance (ES) systems. In this paper, we introduce an algorithm that designs a low probability of intercept (LPI) radar waveform. Our approach directly minimizes the detection probability of summation
Qiang Liu   +4 more
doaj   +1 more source

Foreign languages and trade [PDF]

open access: yes, 2009
Cultural factors and especially common languages are well-known determinants of trade. By contrast, the knowledge of foreign languages was not explored in the literature so far.
Fidrmuc, J, Fidrmuc, J
core  

Comet Science Working Group report on the Halley Intercept Mission [PDF]

open access: yes
The Halley Intercept Mission is described and the scientific benefits expected from the program are defined. One characteristic of the mission is the optical navigation and resulting accurate delivery of the spacecraft to a desired point near the nucleus.

core   +1 more source

Hybridization of Cognitive Radar and Phased Array Radar Having Low Probability of Intercept Transmit Beamforming

open access: yesInternational Journal of Antennas and Propagation, 2014
A novel design of a cognitive radar (CR) hybridized with a phased array radar (PAR) having a low probability of intercept (LPI) transmit beam forming is proposed. PAR directed high gain property reveals its position to interceptors.
Abdul Basit   +4 more
doaj   +1 more source

THE DETERMINANTS OF ECO-LABEL USAGE IN THE ORGANIC PRODUCE MARKET OF NORTHEAST ARKANSAS [PDF]

open access: yes
This study used consumer intercept interviews at farmers markets and organic produce retail stores in northeast Arkansas to determine the variables that influence eco-label usage in organic produce markets.
Armah, Paul W.
core   +1 more source

QQ plots, Random sets and data from a heavy tailed distribution

open access: yes, 2007
The QQ plot is a commonly used technique for informally deciding whether a univariate random sample of size n comes from a specified distribution F. The QQ plot graphs the sample quantiles against the theoretical quantiles of F and then a visual check is
Das, Bikramjit, Resnick, Sidney I.
core  

Secure Relay Selection With Outdated CSI in Cooperative Wireless Vehicular Networks: A DQN Approach

open access: yesIEEE Access
Cooperative communications is a core research area in wireless vehicular networks (WVNs), thanks to its capability to provide a certain degree of fading mitigation and to improve spectral efficiency.
Esraa M. Ghourab   +5 more
doaj   +1 more source

Analysis of Security–Reliability Tradeoff of Two-Way Hybrid Satellite–Terrestrial Relay Schemes Using Fountain Codes, Successive Interference Cancelation, Digital Network Coding, Partial Relay Selection, and Cooperative Jamming

open access: yesTelecom
In this paper, we propose a two-way hybrid satellite–terrestrial relay scheme employing Fountain codes (FCs). In the proposed model, a satellite and a ground user exchange data through a group of terrestrial relay stations, in the presence of an ...
Nguyen Van Toan   +4 more
doaj   +1 more source

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