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Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023 Abstract Near‐infrared adaptive optics as well as fringe tracking for coherent beam combination in optical interferometry require the development of high‐speed sensors. Because of the high speed, a large analog bandwidth is required. The short exposure times result in small signal levels which require noiseless detection.
Gert Finger +18 more
wiley +1 more source
An Enhanced Multiple Random Access Scheme for Satellite Communications [PDF]
, 2011 In this paper, we introduce Multi-Slots Coded ALOHA (MuSCA) as a multiple random access method for satellite communications. This scheme can be considered as a generalization of the Contention Resolution Diversity Slotted Aloha (CRDSA) mechanism. Instead
Bui, Huyen-Chi +6 more
core +1 more source
Performance Enhancements for Asynchronous Random Access Protocols over Satellite [PDF]
, 2011 In this paper, a novel enhancement of the well known ALOHA random access mechanism is presented which largely extends the achievable throughput compared to traditional ALOHA and provides significantly lower packet loss rates. The novel mechanism, called
Kissling, Christian, Christian Kissling
core +1 more source
Stability of slotted ALOHA with spatial diversity [PDF]
IEEE International Conference on Communications, 2003. ICC '03., 2004 We consider the problem of stability of slotted ALOHA for a system consisting of N users communicating with a common receiver, which employs spatial diversity to receive multiple transmissions simultaneously. We introduce a general packet reception model to incorporate multiple packet receptions since the collision channel model is no longer valid in ...
Vidyut Naware, Lang Tong 0001
openaire +1 more source
Polarized MIMO Slotted ALOHA Random Access Scheme in Satellite Network
IEEE Access, 2017 The massive number of the machine type communication terminals accessing the satellite network brings a new challenge for the random access (RA) system.
Jialing Bai, Guangliang Ren
doaj +1 more source
Optimal Dynamic Frame-Slotted Aloha [Elektronisk resurs] : (ODFSA)
, 2011 Passive UHF RFID systems using Dynamic Frame-Slotted ALOHA (DFSA) adjust the frame size according to the number of tags, but frame size N is equals to 2^Q and cannot be adjusted exactly to the number of tags to be identified. In this paper, we propose an
Nazir, Mian Hammad, +2 more
core +7 more sources
IEEE Access, 2023 In satellite Internet-of-Things (IoT) systems using the 920-MHz band Low Power Wide Area, available channels for each terminal are limited to avoid interference with terrestrial networks. Since this limitation depends on the location of the terminal, the
Kansuke Kumazawa +7 more
doaj +1 more source
A novel RFID multi-tag anti-collision protocol for dynamic vehicle identification.
PLoS ONE, 2019 In order to obtain the information of the vehicle tags in adverse traffic conditions, we proposed a novel reservation framework named reservation to cancel idle-dynamic frame slotted ALOHA (RTCI-DFSA) algorithm.
Zhijian Qu +3 more
doaj +1 more source
Generalized Encoding CRDSA: Maximizing Throughput in Enhanced Random Access Schemes for Satellite
EAI Endorsed Transactions on Mobile Communications and Applications, 2014 This work starts from the analysis of the literature about the Random Access protocols with contention resolution, such as Contention Resolution Diversity Slotted Aloha (CRDSA), and introduces a possible enhancement, named Generalized Encoding Contention
Manlio Bacco +2 more
doaj +1 more source
Throughput Analysis of Large Wireless Networks with Regular Topologies
EURASIP Journal on Wireless Communications and Networking, 2007 The throughput of large wireless networks with regular topologies is analyzed under two medium-access control schemes: synchronous array method (SAM) and slotted ALOHA. The regular topologies considered are square, hexagon, and triangle.
Kezhu Hong, Yingbo Hua
doaj +2 more sources