نتایج جستجو برای: spectrum reuse

تعداد نتایج: 250609  

Journal: :Wireless Networks 1999
Achille Pattavina S. Quadri Vittorio Trecordi

Great interest in recent years has been devoted to mobile communications. The research effort has been directed to increasing the capacity of radio systems by applying space reuse techniques. Higher efficiency in the usage of the available frequency spectrum can be obtained either by reducing the cell size, thus requiring the provision of new base stations, or by reusing the available spectrum ...

2000
Colin Atkinson Joachim Bayer Dirk Muthig

The product line and component-based approaches to software engineering both hold the potential to significantly increase the level of reuse in industrial software development and maintenance. They also have complementary strengths, since they address the problem of reuse at opposite ends of the granularity spectrum product line development essentially supports "reuse in the large" while compon...

1999
Theodore S. Rappaport Robert A. Brickhouse

Indoor parasitic cellular systems reuse the same frequencies as outdoor cellular (macrocellular) systems to provide wireless communications inside a building or campus. This paper provides a simulation strategy to determine future channel availability that is possible between in-building and outdoor cellular systems that share the same radio spectrum. Capacity that is currently available inside...

2005
Imanol Martinez Jon Altuna

The Spatial reuse Time Division Multiple Access (STDMA) ad hoc networks take advantage of the electromagnetic spectrum reuse to increase the global capacity of the network. The schedule creation takes into account different variables. One of them, the Signal-Interference plus Noise Ratio (SINR) generates that the geographical distribution of nodes influences a lot the behavior of the network. T...

2012
Chandra Thapa

3 Generation Partnership Project Long Term Evolution (3GPP-LTE) is focusing towards aggressive frequency reuse i.e. reuse of 1 so that we can get maximum number (all available spectrum) within a cell. Now, the major hindrance is co-channel interference which increases dramatically due to nearby adjacent co-channel cell and most especially for cell edge users. Traditional frequency reuse concept...

2015
Pardeep Kumar Sanjeev Kumar

-The Long term evolution (LTE) is a latest technology standardized by 3 rd generation partnership project (3GPP) to fulfill the growing demands of the users like high data rates in downlink and uplink, low cost, high spectral efficiency etc. Due to the growing demand for high data rate there is need to focus on frequency reuse i.e. reuse-1 so that we can get complete spectrum with in a cell. Bu...

Journal: :EURASIP J. Wireless Comm. and Networking 2012
Lei Chen Di Yuan

For broadband cellular access based on orthogonal frequency division multiple access (OFDMA), fractional frequency reuse (FFR) is one of the key concepts for mitigating inter-cell interference and optimizing cell-edge performance. In standard FFR, the number of OFDMA sub-bands and the reuse factor are fixed. Whereas this works well for an idealized cell pattern, it is neither directly applicabl...

1994
Rolando F. Diesta Chikezie O. U. Eleazu Jean-Paul M. G. Linnartz

Abstruct: Optimum frequency reuse patterns for roadside base station to vehicle communications in Intelligent VehicldHighway Systems (IVHS) are determined based on optimal delayhhroughput and packet erasure rates for BPSK transmission over narrowband dispersive Rician channel with IS1 and (Rayleigh-faded) co-channel interference. For fixed cluster size and fixed total system bandwidth, a reuse ...

2017
Jiangbin Lyu

In conventional terrestrial cellular networks, mobile terminals (MTs) at the cell edge often pose the performance bottleneck due to their long distances from the serving ground base station (GBS), especially in hotspot period when the GBS is heavily loaded. This paper proposes a new hybrid network architecture by leveraging the use of unmanned aerial vehicle (UAV) as an aerial mobile base stati...

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