نتایج جستجو برای: cellular networks

تعداد نتایج: 847899  

Journal: :IEEE Network 2021

With 5G mobile communication systems having been commercially rolled out, research discussions on next generation systems, that is, 6G, have started. On the other hand, vehicular technologies are also evolving rapidly, from connected vehicles called V2X (vehicle to everything) autonomous combination of two, networks (CAV). How fast evolution these two areas will go hand-in-hand is great importa...

Journal: :مهندسی برق مدرس 0
mohammad moltafet m.sc. student, department of electrical and computer engineering, tarbiat modares university, tehran iran, paiz azmi full professor, department of electrical and computer engineering, tarbiat modares university, tehran iran ali karimi kelayeh m.sc. student, department of electrical and computer engineering, tarbiat modares university, tehran iran moslem foruzesh m.sc. student, department of electrical and computer engineering, tarbiat modares university, tehran iran

in this paper, downlink resource allocation for a sparse code multiple access (scma) based heterogeneous  cellular networks (hcn) is investigated. the main aim of this paper is to obtain joint power allocation and codebook assignment to achieve the least total system transmit power. in this regard, the proposed objective function is formulated as total transmit power subject to users minimum ra...

Journal: :Mathematical Problems in Engineering 2015

Journal: :IEEE Transactions on Neural Networks and Learning Systems 2012

Journal: :IEEE Transactions on Wireless Communications 2020

The widespread use of wireless cellular networks has made security an ever increasing concern. GSM is the most popular wireless cellular standard, but security is an issue. The most critical weakness in the GSM protocol is the use of one-way entity authentication, i.e., only the mobile station is authenticated by the network. This creates many security problems including vulnerability against m...

2017
Jeonghun Park Namyoon Lee Robert W. Heath

We characterize the ergodic spectral efficiency of a non-cooperative and a cooperative type of K-tier heterogeneous networks with limited feedback. In the non-cooperative case, a multi-antenna base station (BS) serves a single-antenna user using maximum-ratio transmission based on limited feedback. In the cooperative case, a BS coordination set is formed by using dynamic clustering across the t...

2007
J. A. Nossek M. Tanaka

Since their introduction, Cellular Neural Networks 4] have turned out to be useful architectures for the solution of many problems, e. g. in image processing or in the simulation of partial diierential equations. Therefore, there have been several attempts to introduce cell circuits suitable for large-scale integration 3]. Up to now, all of these cells need energy and therefore power supply. Ju...

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