Noise Immunity of Data Transfer Channels in Cooperative Observation Systems: Comparative Analysis

2018 ◽  
Author(s):  
Iryna Svyd ◽  
Ivan Obod ◽  
Oleksandr Maltsev ◽  
Oleksandr Vorgul ◽  
Ganna Zavolodko ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Noise Immunity ◽  
Data Transfer ◽  
Observation Systems ◽  
Transfer Channels

THE INCREASING OF DATA TRANSFER NOISE IMMUNITY IN DEPARTMENTAL COMMUNICATION SYSTEMS OF SHORT-WAVE RANGE

2018 ◽  
pp. 7-19
Author(s):  
B. G. Shadrin ◽  
◽  
D. E. Zachateyskiy ◽  
V. A. Dvoryanchikov Dvoryanchikov ◽  
◽  
...  
Keyword(s):  
Communication Systems ◽  
Noise Immunity ◽  
Data Transfer ◽  
Short Wave ◽  
Wave Range

DIGITAL TELECOMMUNICATION STANDARDS VDL MODE 4 AND 1090ES FOR CIVIL AVIATION. COMPARATIVE ANALYSIS

2020 ◽  
Author(s):  
А.В. МИРОШНИЧЕНКО ◽  
И.А. ТАТАРЧУК ◽  
С.С. ШАВРИН ◽  
Э.Я. ФАЛЬКОВ
Keyword(s):  
Comparative Analysis ◽  
Traffic Control ◽  
Situational Awareness ◽  
Digital Communication ◽  
Data Transfer ◽  
Evaluation Criteria ◽  
Unmanned Aircraft ◽  
Civil Aviation ◽  
Radio Communication ◽  
The Common

Внедрение стандартов цифровой радиосвязи в гражданской авиации происходит практически без взаимодействия с международными организациями по стандартизации в области телекоммуникаций. При этом цифровая связь используется в первую очередь для обеспечения безопасности полетов воздушных судов. По радиоканалу в вещательном режиме каждое воздушное судно передает информацию о своем местоположении, обеспечивая таким образом ситуационную осведомленность экипажей других судов и диспетчеров. Поскольку число пассажирских и грузовых судов растет, а кроме того, в последнее время многократно возросло число беспилотных судов,которые должны быть интегрированы в общее воздушное пространство, то назрела необходимость рассмотреть существующие стандарты цифровой авиационной связи и провести сравнительный анализ их параметров. В данной работе выполнен сравнительный анализ физического и канального уровней стандартов VDL mode 4 и 090ES,а также представлены критерии качества передачи данных с помощью технологии автоматического зависимого наблюдения-вещания. Сравнение проведено по результатам моделирования работы стандартов в условиях высокой загруженности воздушного пространства. Digital communication standards implementation in civil aviation is now performed practically without collaboration with international telecommunications standardization organizations. At the same time, digital communication is primarily intended to ensure the safety of aircraft flights. Each aircraft transmits its position report messages over a radio communication channel in a broadcast mode, thus providing situational awareness for other aircrafts and the air traffic control staff. Since the number of passenger and cargo aircrafts grows, and in addition, the number of unmanned aircraft that must be integrated into the common airspace has recently multiplied, it is time to consider the existing digital aviation communication standards and perform a comparative analysis of their parameters. In the article, a comparative analysis of the physical and link levels of the VDL mode 4 and 1090ES standards was carried out. The ADS-B data transfer quality evaluation criteria are proposed. The VDL mode 4 and 1090ES standards modeling results in conditions of high airspace congestion are compared.

SUBSTANTIATION OF PARAMETERS OF THE 3D CDP FIELD OBSERVATION SYSTEM

2021 ◽  
pp. 40-47
Author(s):  
A. P. Sysoev ◽  
Keyword(s):  
Comparative Analysis ◽  
Distribution Density ◽  
Second Step ◽  
Image Point ◽  
Observation System ◽  
Kirchhoff Migration ◽  
Observation Systems ◽  
The Common ◽  
Gaussian Beam Migration ◽  
The Relationship

The substantiation of parameters of the 3D observation system is considered from the perspective of the Kirchhoff migration. At the first step of this transformation, on the basis of diffraction transformation on a gather of CSP, the problem of wavelet extraction reflected from specified points of the medium (image points) is solved. The characteristic of the directivity of this transformation is determined by parameters of the arrangement of devices. At the second step, summation is performed by gathers of the common image point (СIP). The distribution density of the observation system sources determines the stacking fold by CIP. In the process of selecting survey parameters, the comparative analysis of equivalent observation systems with the same data properties for the migration task, but with different parameters of the observation system, is of great important. The relationship between the step of common midpoints of the observation system and the step of traces of resulting images of the medium is discussed. The Gaussian beam migration algorithm is considered as a method for solving the problem of constructing an image of the medium that correctly takes into account the irregularity of the initial data.

Analiza właściwości wybranych rozwiązań rozproszonych systemów plików

2017 ◽  
Vol 5 (23) (3) ◽  
pp. 53-73
Author(s):  
Karolina Kula ◽  
Marcin Markowski
Keyword(s):  
Comparative Analysis ◽  
Transfer Rate ◽  
Data Transfer ◽  
File Systems ◽  
Evaluation Criterion ◽  
Distributed File Systems ◽  
Data Transfer Rate ◽  
Experimental Part ◽  
Experimental Testbed

W artykule przedstawiono analizę porównawczą trzech najpopularniejszych rozproszonych systemów plików: Ceph, LizardFS, GlusterFS. Głównym kryterium oceny badanych systemów była ich wydajność, rozumiana jako liczba operacji zapisu i odczytu w jednostce czasu oraz maksymalny transfer danych. Analizę oparto na wynikach licznych eksperymentów przeprowadzonych w opracowanym w tym celu stanowisku badawczym. Część badawczą poprzedzono przeglądem technologii oraz najpopularniejszych istniejących systemów tego typu. W pracy przedstawiono wyniki eksperymentów, ich analizę oraz praktyczne wnioski. In this paper we present a comparative analysis of three most popular distributed file systems: Ceph, LizardFS nad GlusterFS. The main evaluation criterion was the efficiency of systems, meant as the number of read and write operation per second and maximum data transfer rate. The analysis is based on results of many experiments conducted in experimental testbed, prepared for this purpose. Experimental part of the paper is preceded with a survey of technology related to most important distributed file systems. The results of experiments have been presented and analyzed, also some practical conclusions have been formulated.

scholarly journals Comparative Analysis of TCP, SCTP and MPTCP in Transport Layer of Wireless Sensor Networks

10.29007/h7cg ◽  
2018 ◽  
Author(s):  
Geerija Lavania ◽  
Preeti Sharma ◽  
Richa Upadhyay
Keyword(s):  
Comparative Analysis ◽  
Wireless Sensor Network ◽  
Sensor Network ◽  
Packet Loss ◽  
Data Transfer ◽  
Reliable Data ◽  
Transport Layer ◽  
Wireless Sensor ◽  
Destination Node ◽  
Reliable Data Transfer

The wireless sensor network is the network that has large number of sensor nodes that are connected to each other. The wireless nodes sense the event and forward packets to the destination node. A transport layer handles congestion and packet loss recovery for reliable data transfer in WSN. There exist several protocols at the transport layer in WSN for reliable data transfer like ESRT, ATP, Tiny TCP/IP, PORT, CTCP, RTMC, DCDD, RETP etc. Each protocol has its merits and demerits. Traditional network uses TCP and UDP protocol at the transport layer. In WSN, these are not suitable. In this work, the TCP, SCTP and MPTCP are compared in the wireless sensor network environment. The wireless network with packet loss is considered. From the comparative analysis, we get the result that MPTCP gives the better performance than TCP and SCTP in the wireless sensor network.

scholarly journals COMPARATIVE ANALYSIS OF DATA TRANSFER TECHNOLOGY BETWEEN SERVER AND CLIENT: AMF AND OBJECTS ON THE WEBSITE

MEST Journal ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 117-127
Author(s):  
Munir Sabanovic ◽  
◽  
Muzafer Saracevic ◽  
Kemal Dzemic
Keyword(s):  
Comparative Analysis ◽  
Data Transfer
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