Zobrazeno 1 - 10
of 27
pro vyhledávání: '"C. Mantakas"'
Publikováno v:
International Journal of Electronics. 74:169-176
This work evaluates the maximum allowable number of concurrent users in a baseband Code Division Multiple Access LAN, for given values of error probability and process gain. Evaluation is based on statistical analysis of signals and is performed for
Publikováno v:
International Journal of Electronics. 72:515-532
The dominant view that code division multiplexing (CDM) is always wasteful of bandwidth, when compared to alternative multiplexing schemes is disputed. The authors show that a synchronous CDM technique with short orthogonal coding sequences can be em
Publikováno v:
International Journal of Electronics. 68:939-956
A local area communication network using code division multiple access (CDMA) techniques based on direct sequence spread spectrum modulation (DS-SSM) is presented. The wide bandwidth required by conventional CDMA systems is radically reduced in this
Publikováno v:
Proceedings of the 7th International Conference on Telecommunications, 2003. ConTEL 2003..
In Sevilla European council it was indicated that two major problems (among the others) have to be solved towards eEurope 2005 and beyond: the transition to digital television in UHF band (digital switchover) and the broadband access for all. This pa
Publikováno v:
Electronics Letters. 29:109-110
A smooth and monotonic phase variation technique in combined multiple amplitude and multiple phase modulation schemes, is investigated. Computer simulation is used to show that the proposed technique achieves a 20% reduction in the mainlobe width of
Publikováno v:
IEE Proceedings J Optoelectronics. 140:267
The current work proposes the use of optical fibres as sensing elements for dose rate measurement of ionising radiation based on controlled light induced annealing or photobleaching. It shows that, under steady-state irradiation, the propagation char
Publikováno v:
Electronics Letters. 28:417
A monotonic phase variation technique (employing phasor rotation in one direction of the unit circle), applicable to PSK modulation schemes is investigated. By computer simulation, the proposed technique is shown to reduce the width of the mainlobe o
Publikováno v:
Electronics Letters. 16:944
A channel synchronisation technique is described for t.d.m. systems carrying voice or teletype signals. According to this method, no extra sync signal is transmitted and synchronisation is extracted from the information signal. Furthermore, some encr
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Akademický článek
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