نتایج جستجو برای: single frequency network

تعداد نتایج: 1889398  

Journal: :IOP Conference Series: Materials Science and Engineering 2017

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2014
mahdi ghamami masoud shariat panahi maryam rezaei

in today's design, system complexity and increasing demand for safer, more efficient and less costly systems have created new challenges in science and engineering. locomotives are products which are designed according to market order and technical needs of customers. accordingly, targets of companies, especially designers and manufacturers of locomotives, have always been on the path of progre...

ژورنال: فیزیک زمین و فضا 2018

Time-frequency filtering is an acceptable technique for attenuating noise in 2-D (time-space) and 3-D (time-space-space) reflection seismic data. The common approach for this purpose is transforming each seismic signal from 1-D time domain to a 2-D time-frequency domain and then denoising the signal by a designed filter and finally transforming back the filtered signal to original time domain. ...

2011
Antonios G. Alexiou Konstantinos Asimakis Christos Bouras Vasileios Kokkinos Andreas Papazois

Long Term Evolution (LTE) systems allow the transmission of rich multimedia services by utilizing the Multimedia Broadcast/Multicast Service (MBMS) over a Single Frequency Network (MBSFN). During MBSFN transmission a time-synchronized common waveform is transmitted from multiple cells. The 3rd Generation Partnership Project (3GPP) has specified that Point-to-Multipoint (PTM) transmission can be...

Journal: :Wireless Networks 2012
Antonios G. Alexiou Konstantinos Asimakis Christos Bouras Vasileios Kokkinos Andreas Papazois Georgia Tseliou

Long Term Evolution (LTE) systems have been specified and designed to accommodate small, high performance, power-efficient, end-user devices. The evolved Multimedia Broadcast/Multicast Service (e-MBMS) feature is introduced by the 3rd Generation Partnership Project (3GPP) as a complement to the existing MBMS service in order to accommodate multicast groups that are interested in receiving the s...

Journal: :JCM 2015
Hung-Bin Chang Izhak Rubin Ofer Hadar

—We consider adaptive-rate multicasting of video streams compressed by using Scalable Video Coding (SVC) over cellular wireless networks. Base station nodes coordinate the scheduling of their downlink transmissions to mitigate intercell interference; as well as, at times, to direct the multicast transmission of the same video streams to a group of clients, as implemented in a Multicast-Broadca...

2014
Kai-Ten Feng Tzu-Hao Su

This paper investigates the resource management problem in the relay-enhanced long term evolution advanced (LTE-A) systems. The challenges of this resource allocation problem arise from the complication of assigning transmission links to the multicast broadcast single frequency network (MBSFN) subframe within the numerous physical resource block (PRB) pair. Existing research work does not fully...

2011
Shinya KUMAGAI Ryusuke MATSUKAWA Tatsunori OBARA Fumiyuki ADACHI

Distributed antenna network (DAN) is a promising wireless network which can mitigate the impacts of distancedependent/shadowing losses and fading. Frequency-domain space-time block coded-joint transmit/receive diversity (FDSTBC-JTRD) is an antenna diversity technique which allows an arbitrary number of transmit antennas while keeping the coding rate constant and is suitable for the downlink tra...

2014
Oscar J. Avella Gonzalez Karlijn I. van Aerde Huibert D. Mansvelder Jaap van Pelt Arjen van Ooyen

Oscillations in electrical activity are a characteristic feature of many brain networks and display a wide variety of temporal patterns. A network may express a single oscillation frequency, alternate between two or more distinct frequencies, or continually express multiple frequencies. In addition, oscillation amplitude may fluctuate over time. The origin of this complex repertoire of activity...

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