Results 61 to 70 of about 13,163 (253)
, 2012 In this paper, we consider a dual-hop multiplerelay network with orthogonal frequency division multiplexing (OFDM) based Amplify-and-Forward (AF) relay protocol over frequency-selective channels. In practice, subcarriers suffered that suffer deep fade in
Xiang, Wei +5 more
core +1 more source
Outage Probability of UAV Communications in the Presence of Interference [PDF]
2018 IEEE Global Communications Conference (GLOBECOM), 2018 Unlike terrestrial communications, unmanned aerial vehicle (UAV) communications have some advantages such as line-of-sight (LoS) environment and flexible mobility, but the interference will be still inevitable. In this paper, we analyze the effect of interference on the UAV communications by considering the LoS probability and different channel fadings
Minsu Kim 0002, Jemin Lee
openaire +2 more sources
Minimizing the Outage Probability in a Markov Decision Process
2023 IEEE Information Theory Workshop (ITW), 2023 Standard Markov decision process (MDP) and reinforcement learning algorithms optimize the policy with respect to the expected gain. We propose an algorithm which enables to optimize an alternative objective: the probability that the gain is greater than a given value. The algorithm can be seen as an extension of the value iteration algorithm.
Vincent Corlay, Jean-Christophe Sibel
openaire +2 more sources
Stabilising Routines in Complex Emergencies: How Basic Service Continuity Shapes Perceived Security
Public Administration and Development, EarlyView.ABSTRACT This study examines how locally embedded actors describe the relationship between basic service continuity and perceived security in complex emergencies, with particular attention to the stabilisation of everyday routines. Using Proximity‐Predictability‐Attributability (PPA) as an analytic lens, we trace how interviewees relate access to water,
Abdullah Gökhan Yaşa, Orçun İmga
wiley +1 more source
Tongxin xuebao, 2017 Physical-layer security could be used to effectively combat eavesdroppers and the transmission reliability of the main link could be improved.A wireless relay network with multiple both decode and forward eavesdroppers and relays were considered,in the ...
Mei-ling LI +3 more
doaj +2 more sources
Outage performance of SWIPT-NOMA-CR network with imperfect SIC and CSI
物联网学报, 2023 For the cognitive relay network based on simultaneous wireless information and power transfer (SWIPT) and non-orthogonal multiple access (NOMA), which is termed as SWIPT-NOMA-CR network, considering the practical situation of imperfect successive ...
Zhuhua MA, Liping LUO
doaj +2 more sources
Three‐Year Propagation Experiment at Ku‐, Ka‐, and Q‐Band in French West Indies
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT From January 2021 to December 2023, the Office National d'Etudes et de Recherches Aérospatiales (ONERA) and the Centre National d'Etudes Spatiales (CNES) conducted a three‐year Earth‐space propagation measurement campaign in Guadeloupe. The experiment used beacon receivers deployed in Pointe‐à‐Pitre airport to record signals at 11.2, 19.7, and
Jean‐Pascal Monvoisin +3 more
wiley +1 more source
Preprocessing Procedure for Propagation Measurements on MEO Satellite Links
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT This paper presents a software tool designed for preprocessing data from an experimental campaign aimed at characterizing the tropospheric propagation channel using Medium Earth Orbit (MEO) satellites. The collected data provide critical insights into the channel in scenarios involving continuous variations in azimuth and elevation, along with
Marlene Brás +2 more
wiley +1 more source
Iterative power control and multiuser detection with outage probability constraints [PDF]
, 2003 This paper proposes a new scheme coupling power control with a minimum outage probability multiuser detector. The resultant iterative algorithm is conceptually simple and finds the minimum sum transmission power of all users with a set of outage ...
Dey, Subhrakanti +2 more
core +1 more source
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT The integration of low Earth orbit (LEO) satellite constellations with commercial aircraft communication systems presents critical challenges in maintaining continuous connectivity during dynamic flight conditions. Current geostationary satellite systems suffer from high round‐trip latency (>$$ > $$ 500 ms) and inadequate coverage at high ...
Raúl Parada +4 more
wiley +1 more source