Results 181 to 190 of about 6,142 (224)

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

Code Division Multiple Access (CDMA)

2018
This 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.
openaire   +1 more source

Tracking acoustic transmitters by code division multiple access (CDMA)-based telemetry

Hydrobiologia, 2002
This 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, M. Benfield, M. Sisak, P. Anson   +3 more
openaire   +1 more source

Applications of optical code division multiple access (CDMA) to wireless communication

Proceedings of SPIE, 1995
The 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.
openaire   +1 more source

A transmission convergence sublayer for wireless ATM with code division multiple access (CDMA)

Proceedings of MILCOM '96 IEEE Military Communications Conference, 2002
Asynchronous transfer mode (ATM) is rapidly emerging as a key transport mechanism of future multimedia networks, and wireless networks are being widely deployed to provide personal communication services. Thus future ATM networks are expected to comprise wireline as well as wireless subnetworks and the interoperability of wireless and wireline ATM ...
F. Vakil, M. Barton
openaire   +1 more source

A coding-theoretical view on code division multiple access: two new constructions of CDMA codes

Proceedings of IEEE Vehicular Technology Conference (VTC), 2002
Coding techniques for the multiple-access problem are investigated. Two constructions of code sequences are considered, one for the OR channel and one for the Gaussian channel. A new construction of codes for the OR channel, which belongs to the family of cyclically permutable (CP) codes also known as optical orthogonal codes, removes the constraint of
Anders Lundqvist, Per-Olof Anderson
openaire   +1 more source

Linear Multiuser Detection in Code Division Multiple Access CDMA - Systems for Wireless Communication

2005 Student Conference on Engineering Sciences and Technology, 2005
Multiuser detection is central to the fulfillment of the capabilities of code-division multiple access (CDMA), which is becoming the ubiquitous air-interface in future generation communication systems. In DS-CDMA communications, all user signals overlap in time and frequency and cause mutual interference.
Muhammad Zahid Khan, null Haroon-Ur-Rashid   +1 more
openaire   +1 more source

Applications of Chaotic Digital Code-Division Multiple Access (CDMA) to Cable Communication Systems

International Journal of Bifurcation and Chaos, 1998
In this paper the technical details of chaotic digital code-division multiple access ((CD)2MA) communication systems used in cable communication systems are presented. The cable communication system may be a pure coaxial RF cable network, a hybrid fiber-coax network, or a pure optical fibre network for high-capacity data link.
Tao Yang, Leon O. Chua
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

Quasi‐synchronous code division multiple access (CDMA) with binary shift‐register sequences

Electronics and Communications in Japan (Part III: Fundamental Electronic Science), 1996
AbstractThis paper discusses the quasi‐synchronous code‐division multiple access system (QS‐CDMA), where the time error in the synchronized access is allowed for a certain range, based on the spread‐spectrum communication technique. the Gold sequence and the M sequence, which are the binary shift‐register sequences, are used to derive the set of quasi ...
Seiji Kuno, Takaya Yamazato, Masaaki Katayama, Akira Ogawa   +3 more
openaire   +1 more source