Results 151 to 160 of about 18,357,996 (200)
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On multi-carrier code division multiple access (MC-CDMA) modem design
Proceedings of IEEE Vehicular Technology Conference (VTC), 2002Standard spread-spectrum techniques encounter a severe performance loss under channels with large Doppler spread. It is shown that the novel spread-spectrum technique, called multi-carrier (MC) CDMA, is dual to direct-sequence CDMA. This enables to derive that MC-CDMA is a signalling technique which allows optimum detection under severe Doppler spread.
Gerhard P. Fettweis +2 more
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Study of asynchronous telecommunication system, based on code division multiple access (CDMA)
2024 XXXIII International Scientific Conference Electronics (ET)Ivo Dochev +2 more
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Performance Analysis of a Slotted Code Division Multiple Access(CDMA) Network
MILCOM 1984 - IEEE Military Communications Conference, 1984A performance model of a multihop Code Division Multiple Access(CDMA) Spread Spectrum Network is presented. Time is divided into slots and the network nodes are synchronized such that fixed length messages will only be sent at the beginning of slots. The message generation processes at the nodes are assumed to be independent Bernoulli processes. A node
Szu-Lin Su, Victor O.K. Li
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Generalized Temporal Code Division Multiple Access (CDMA) For Optical Communications
SPIE Proceedings, 1990The CSI has developed analytical techniques for constructing pseudo orthogonal words suitable for temporal CDMA. The performance of these sets of words have been studied with respect to bit-error rate and with respect to other coding methods. The CSI methodology and algorithms permit generalized solutions for any combination of users (words), weights ...
A. J. Mendez +3 more
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Code Division Multiple Access (CDMA)
2018This chapter presents a brief overview of spread spectrum technique and shows how it relates to CDMA technology. Orthogonal codes and their properties are presented and show how orthogonal codes are generated and used to design CDMA radio. It is shown that CDMA capacity directly relates to code length.
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Code division multiple access (CDMA) enhancement of wavelength division multiplexing (WDM) systems
Proceedings IEEE International Conference on Communications ICC '95, 2002Wavelength division multiplexing (WDM) is a mainstream technology for optical communications ranging from long haul applications to interconnections between and within high speed digital systems. WDM is, however, constrained (1) in density by the crosstalk associated with channel spacing and (2) by total number of channels which can be uniformly ...
A.J. Mendez, R.M. Gagliardi
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CDMA-IC: a novel code division multiple access scheme based on interference cancellation
[1992 Proceedings] The Third IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2003Third generation cellular systems will need to increase capacity significantly from previous generations. A system based on code division multiple access may be of interest provided limitations often present in current proposals are overcome. Here, an alternative is discussed which offers many promising features. The predicted capacity is very high and
Paul Dent +2 more
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Multilevel priority scheme for fiber-optic code division multiple access (CDMA) packet networks
IEEE INFOCOM '93 The Conference on Computer Communications, Proceedings, 2002A multilevel priority scheme for fiber-optic CDMA is proposed. Users are divided into groups with different transmission power levels. Since the inherent properties and signal processing of the conventional communication channels are different from those of the fiber-optic channels, new code sequences must be constructed for fiber-optic applications ...
Li, Victor OK, Hsu, CherngShung
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Applications of optical code division multiple access (CDMA) to wireless communication
Proceedings of SPIE, 1995The theoretical foundations for code division multiple access (CDMA) are similar for microwave and optical implementations, and the advantages of this form of multiple access communications are similar, also. The advantages include the ability to support bursty, asynchronous, concurrent communications and to tolerate multipath interference.
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Tracking acoustic transmitters by code division multiple access (CDMA)-based telemetry
Hydrobiologia, 2002This paper describes a new acoustic telemetry system based on the principles of code division multiple access (CDMA) whereby signal coding enables the simultaneous sub-meter monitoring of potentially hundreds of animals at high sampling rate (e.g. 5 s) and on a single frequency channel.
G. Niezgoda +3 more
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