Results 181 to 190 of about 23,563 (255)

Independent Code Division Multiple Access in DS-CDMA

Wireless Personal Communications, 2021
An independent component analysis (ICA) based CDMA receiver is proposed, which in addition to the independence of users also exploits the independence of pseudo-codes in user signal separation. The proposed scheme is termed as independent code division multiple access in contrast to orthogonal code division multiple access being used in conventional ...
Irfan Anjum, Aqeel A. Syed, Azhar A. Rizvi   +2 more
openaire   +1 more source

Cellular Code Division Multiple Access (CDMA) Principles

, 2007
Mosa Ali Abu‐Rgheff
openaire   +2 more sources

Chaotic Digital Code-Division Multiple Access (CDMA) Communication Systems

International Journal of Bifurcation and Chaos, 1997
In this paper, the structure, principle and framework of chaotic digital code-division multiple access ((CD)2 MA) communication systems are presented. Unlike the existing CDMA systems, (CD)2MA systems use continuous pseudo-random time series to spread the spectrum of message signal and the spread signal is then directly sent through a channel to the ...
Yang, Tao, Chua, Leon O.
openaire   +2 more sources

Code division multiple access (CDMA) enhancement of wavelength division multiplexing (WDM) systems

Proceedings IEEE International Conference on Communications ICC '95, 2002
Wavelength 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
openaire   +1 more source

Generalized Temporal Code Division Multiple Access (CDMA) For Optical Communications

SPIE Proceedings, 1990
The 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, S. Kuroda, R. Gagliardi, E. Garmire   +3 more
openaire   +1 more source

Performance Analysis of a Slotted Code Division Multiple Access(CDMA) Network

MILCOM 1984 - IEEE Military Communications Conference, 1984
A 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
openaire   +1 more source

Ultrafast all-optical code-division multiple-access (CDMA) fiber-optic networks

Computer Networks and ISDN Systems, 1994
Abstract With the advanced development of fiber-optics, the large bandwidth-expansion required by spread spectrum code-division multiple-access (CDMA) can now be accomodated by using a fiber-optic channel for transmission and incoherent optical signal processing for code generation and correlation.
Wing C. Kwong, Paul R. Prucnal
openaire   +1 more source

Error Performance of Chaotic Digital Code-Divison Multiple Access (CDMA) Systems

International Journal of Bifurcation and Chaos, 1998
Chaotic digital code-division multiple access ((CD)2MA) systems are new types of communication systems using chaotic carriers. (CD)2MA had found applications in both wireless and other communication systems. In this paper we study the error performance of chaotic digical code-division multiple access ((CD)2MA) systems used in both wireless environment
Yang, Tao, Chua, Leon O.
openaire   +2 more sources

Code Division Multiple Access (CDMA) applicable for Mobile Satellite Communications

2011 International Siberian Conference on Control and Communications (SIBCON), 2011
This paper describes in particular Code Division Multiple Access (CDMA) applicable in Mobile Satellite Communications (MSC) connecting Mobile Earth Stations (MES) via Land Earth Stations (LES). However, in satellite communication systems, as a rule, especially in MSC many users are active at the same time.
openaire   +1 more source

Multilevel priority scheme for fiber-optic code division multiple access (CDMA) packet networks

IEEE INFOCOM '93 The Conference on Computer Communications, Proceedings, 2002
A 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
openaire   +2 more sources