Results 71 to 80 of about 4,823 (179)

Multicarrier Access and Routing for Wireless Networking

open access: yesEURASIP Journal on Wireless Communications and Networking, 2005
A multicarrier access and routing system has been proposed for use in wireless networks. Users within each cell access a radio port (RP). All RPs are connected to a radio exchange node (REN) which routes the calls or packets.
Gerakoulis Diakoumis
doaj   +2 more sources

Large Families of Ternary Sequences with Aperiodic Zero Correlation Zone Sequences for a Multi-Carrier DS-CDMA System [PDF]

open access: yes, 2002
A new method for generating families of ternary spreading sequences is presented. The sequences have aperiodic zero correlation zones and large families are created for a specific sequence length.
Donelan, H., O'Farrell, T.
core  

CDMA Transmission with Complex OFDM/OQAM

open access: yesEURASIP Journal on Wireless Communications and Networking, 2008
We propose an alternative to the well-known multicarrier code-division multiple access (MC-CDMA) technique for downlink transmission by replacing the conventional cyclic-prefix orthogonal frequency division multiplexing (OFDM) modulation by an advanced ...
Lélé Chrislin   +3 more
doaj  

On multicarrier signals where the PMEPR of a random codeword is asymptotically log n [PDF]

open access: yes, 2004
Multicarrier signals exhibit a large peak-to-mean envelope power ratio (PMEPR). In this correspondence, without using a Gaussian assumption, we derive lower and upper probability bounds for the PMEPR distribution when the number of subcarriers n is large.
Hassibi, Babak, Sharif, Masoud
core  

Energy-Efficient Resource Allocation in Wireless Networks: An Overview of Game-Theoretic Approaches

open access: yes, 2007
An overview of game-theoretic approaches to energy-efficient resource allocation in wireless networks is presented. Focusing on multiple-access networks, it is demonstrated that game theory can be used as an effective tool to study resource allocation in
Meshkati, Farhad   +2 more
core   +1 more source

IMPROVED EXPRESSION FOR THE AVERAGE BEP OF MC-CDMA SYSTEMS WITH MRC DIVERSITY RECEPTION

open access: yesElectrica, 2010
Multi-carrier code division multiple access (MC-CDMA) which is a combination of multicarrier modulation and code division multiple access has gained wide acceptance in recent works because of its many advanced features.
Ibrahim DEVELI
doaj   +2 more sources

SGD Frequency-Domain Space-Frequency Semiblind Multiuser Receiver with an Adaptive Optimal Mixing Parameter [PDF]

open access: yes, 2013
A novel stochastic gradient descent frequency-domain (FD) space-frequency (SF) semiblind multiuser receiver with an adaptive optimal mixing parameter is proposed to improve performance of FD semiblind multiuser receivers with a fixed mixing parameters ...
Phrompichai, S.
core   +1 more source

Effects of carrier frequency accuracy on quasi-synchronous, multicarrier DS-CDMA communications using optimized sequences [PDF]

open access: yes, 1999
It is known that the multiple access interference (MAI) of a quasi-synchronous (QS) multicarrier direct signal code division multiple access (DS-CDMA) system can be substantially reduced by using signature sequences having optimized cross correlation at ...
Ng, TS, Yip, KW
core   +1 more source

Adaptive Algorithms Versus Higher Order Cumulants for Identification and Equalization of MC-CDMA

open access: yesJournal of Telecommunications and Information Technology, 2014
In this paper, a comparative study between a blind algorithm, based on higher order cumulants, and adaptive algorithms, i.e. Recursive Least Squares (RLS) and Least Mean Squares (LMS) for MultiCarrier Code Division Multiple Access (MC-CDMA) systems ...
Mohammed Zidane   +4 more
doaj   +1 more source

Comparison of equalisation strategies for multi-carrier CDMA [PDF]

open access: yes, 2003
This paper focuses on the bit error rate (BER) performance of equalisation strategies for a downlink MC-CDMA based system. Simulation results utilising maximal ratio combining (MRC), orthogonal restoring combining (ORC), equal gain combining (EGC) and ...
Armour, SMD   +3 more
core   +2 more sources

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