نتایج جستجو برای: cellular radio system
تعداد نتایج: 2660565 فیلتر نتایج به سال:
In order to examine radiation-induced proteins in an extremely radio-resistant bacterium, it became possibleto perform comparative proteomic analysis on radio-resistance Bacillus megaterium WHO as a wildtypestrain for the first time. Variation in cellular proteins profiles of the Bacillus megaterium WHO after 5KGy γ-irradiation were analyzed by two-dimensional poly acryl amide...
The third generation (3G) cellular system offers high data rate services compared with 1G and 2G systems. The planners must utilize all possible resources to improve capacity and coverage area for the cellular network. The aim of this paper to investigate the third generation (3G) cellular system offers high data using simulation, the impact of cell splitting, additional carrier and remote radi...
This paper proposes a Multi-hop Radio Access Cellular (MRAC) scheme for achieving both highspeed/high-capacity and good area coverage in fourth generation mobile communications systems. In this scheme, we assume two kinds of hop stations, one is a dedicated repeater station installed at a good propagation location such as a rooftop, and the other is a user terminal that temporarily experiences ...
Sphingolipid metabolism was examined in guinea-pig airway smooth muscle cells stimulated by platelet-derived growth factor (PDGF) and 4β-phorbol 12- myristate 13-acetate (PMA), as mitogens and bradykinin (BK) as non-mitogen. Stimulation of the cells by PMA and PDGF for 60 min. at 37°C induced the following changes in sphingolipid metabolites: in cells prelabeled with PH] palmitate, a 1.2 f...
In this chapter we explain how we use game theory application in wireless communication ad-hoc network. The application of mathematical analysis to the study of wireless communication ad hoc networks has met with limited success due to the complexity of mobility, traffic models and the dynamic topology. A scenario based UMTS TDD opportunistic cellular system with an ad hoc behaviour that operat...
Power assignment schemes are man-made methods to enhance the capture e!ect of radio communications. In a previous study, Wen and Yang investigated the combined capture e!ect of the "xed power assignment scheme, Rayleigh fading, and near}far e!ect on the performance of packet radios. The performance analysis was limited to an in"nite population environment. This assumption is reasonable for a co...
Radio resource is scarce for cellular network and application of this network is increasing. We assume radio resources here are complete frequency carriers. Different traffic load conditions generate hot and low traffic areas. We are assuming a macro-cellular scenario where base stations communicate by exchange of information. To maintain performance of the whole network, load sharing in distri...
The growth of the mobile network system of which the cellular systems like Global System Mobile Communications (GSM) and Personal Digital Cellular (PDC) are representative and the IP network attracts worldwide attention. The IP network access through the mobile data network system is required strongly to use the useful IP services anytime and anywhere. Therefore on the mobile data network syste...
Kumar N . Sivarajan and Robert J . McEliece, California Institute of Technology,’ and John W. Ketchum, GTE Laboratories Incorporated. In this paper, we describe some heuristic channel assignment algorithms for cellular systems, that we have recently developed. These algorithms have yielded optimal, or near-optimal assignments, in many cases. The channel assignment problem can be viewed as a gen...
The Global System for Mobile (GSM) cellular standard, having been in existence for over two decades, is the most widely deployed wireless technology in the world. While third generation networks and beyond, such as Universal Mobile Telecommunications System (UMTS) and Long Term Evolution (LTE), are undergoing extraordinary growth and driving a large share of current cellular development, techno...
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