WiMAX - realising the next step for wireless broadband (Abstract only)

2006 ◽  
Author(s):  
A. McKinnon
Keyword(s):  
Wireless Broadband

Emerging wireless broadband networks

1998 ◽  
Vol 36 (2) ◽  
pp. 112-117 ◽  
Author(s):  
J. Mikkonen ◽  
C. Corrado ◽  
C. Evci ◽  
M. Progler
Keyword(s):  
Broadband Networks ◽  
Wireless Broadband

WIRELESS LOCAL AREA NETWORKS IN A PERSONALIZED EMERGENCY RESCUE MANAGEMENT SYSTEM

2021 ◽  
pp. 44583362-44583362
Author(s):  
В.К. САРЬЯН ◽  
А.И. ПАРАМОНОВ ◽  
А.С. ВИКУЛОВ ◽  
Р.М. ЯКУБОВСКИЙ
Keyword(s):  
Ad Hoc ◽  
Local Area ◽  
Network Stability ◽  
Original Solution ◽  
Control Center ◽  
Broadband Access Networks ◽  
Emergency Rescue ◽  
System Service ◽  
Wireless Broadband ◽  
Individualized Management

Анализируются возможности использования локальных беспроводных сетей широкополосного доступа в системах управления спасением людей в чрезвычайных ситуациях. Рассматриваются методы локализации пользователей, оказавшихся в опасных условиях, а также способы повышения доступности информации о них для передачи в центр управления спасением и уровня информированности самих пользователей о планах центра по их спасению. Предлагается оригинальное решение, позволяющее выполнять локализацию поэлементно, т. е. в помещениях и на отдельных участках области обслуживания системы. Показано, что решение может быть успешно использовано для организации сетевой инфраструктуры объектовой части глобальной экспертной системы, обеспечивающей доступ массового абонента в любое время и в любом месте к услуге индивидуализированного управления спасением абонентов при возникновении чрезвычайной ситуации природного или техногенного происхождения. Представлены методы повышения устойчивости сети, в частности метод построения одноранговой ad-hoc-сети с использованием коммуникаций устройство-устройство. The article analyzes the possibilities of using local wireless broadband access networks in emergency management systems for rescue people. Methods of localization of users in dangerous conditions, ways of increasing the availability of information about them for the rescue control center, as well as the level of awareness of the users themselves about the plans of the center for their rescue are considered. It is proposed the original solution, that allows localization to be performed element by element, i.e. in rooms and certain areas of the system service area. It is shown that the solution can be successfully used to organize the network infrastructure of the facility part of the global expert system, which provides mass subscriber access at any time and in any place to the service of individualized management of the rescue of subscribers in case of natural or man-made disasters. Methods for enhancing network stability are presented, in particular, a method for constructing a peer-to-peer ad-hoc network using device-to-device communications.

scholarly journals Spectral Efficiency of FBMC Over OFDM System

2019 ◽  
Vol 9 (2S3) ◽  
pp. 235-237
Keyword(s):  
Spectral Efficiency ◽  
Orthogonal Frequency Division Multiplexing ◽  
Filter Bank ◽  
Average Power ◽  
Primary Objective ◽  
Mobile Environments ◽  
Frequency Division ◽  
Doppler Shifts ◽  
Wireless Broadband ◽  
High Spectral Efficiency

Significant wireless broadband technology used in various cellular standards is Orthogonal Frequency Division Multiplexing (OFDM) which will make use of Multi Carrier Modulated (MCM) systems. Even though OFDM has numerous advantages, it is hard to employ OFDM for complex networks. It is very hard to establish synchronization in mobile environments as it is difficult to predict the Doppler shifts of different users, which results in inter carrier interference (ICI). Further, filters associated with OFDM carrier have comparatively large sidebands which outcomes in Out of Band (OOB) radiations. Insufficient spectral usage is provided by CP-OFDM by using more guard band. So the problems caused by traditional OFDM/CP-OFDM can be answered by employing a new system termed as Filter Bank Multi Carrier (FBMC) System. It is a form of MCM and it can be considered as an advanced cyclic-prefix (CP-OFDM). In OFDM, whole band gets filtered while in FBMC, each sub carrier band is independently filtered. The primary objective of this work is to relate the performance of 5G modulation technique such as FBMC against OFDM and to suggest an ideal waveform for 5G communication in regard to high spectral efficiency, spectral density, BER and less Peak to Average Power Ratio (PAPR).

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