Paper Info
Title
Uplink performance evaluation of multicode DS/CDMA systems in the presence of nonlinear distortions
Abstract
This paper investigates the behavior of multicode direct sequence code division multiple access (DS/CDMA) systems in the presence of nonlinear distortions caused by high power amplifiers. The performance of the multicode system can be degraded due to a large variation in the envelope of the multicode signal. A technique that uses a small number of parallel transmitted sequences is proposed for combating the nonlinearity. This technique ran be modified to have a constant envelope for achieving further performance improvement. Comprehensive comparisons are made for different systems, based on both theoretical analysis and computer simulation. Our study shows that the technique employing a few parallel transmitted sequences, in conjunction with quasi-ML (maximum likelihood) detection, and the use of the modified scheme, are very effective for combating the nonlinearity
Year
DOI
Venue
2000
10.1109/49.864007
IEEE Journal on Selected Areas in Communications
Keywords
Field
DocType
modified scheme,multicode ds,uplink performance evaluation,parallel transmitted sequence,different system,cdma system,nonlinear distortion,multicode system,computer simulation,performance improvement,comprehensive comparison,multicode direct sequence code,multicode signal,constant envelope,codes,sequences,indexing terms,code division multiple access,spread spectrum communication
Nonlinear system,Telecommunications,Cdma systems,Computer science,Real-time computing,Electronic engineering,Code division multiple access,Nonlinear distortion,Telecommunications link,Amplifier,Performance improvement,Spread spectrum
Journal
Volume
Issue
ISSN
18
8
0733-8716
Citations 
PageRank 
References 
12
1.36
6
Authors
2
Name
Order
Citations
PageRank
N. Guo1121.36
L. B. Milstein21670254.06