Paper Info
Title
Statistical modeling of bit-error-rates in asynchronous multicarrier CDMA and direct-sequence CDMA systems
Abstract
This paper presents a method for modeling the bit-error-rate (BER) probability density functions (pdf) of asynchronous Multicarrier Code Division Multiple Access (MC-CDMA) and Direct-Sequence Code Division Multiple Access (DS- CDMA) systems. An uplink channel is considered and it is assumed that the only channel distortion introduced by the channel is caused by the timing misalignments. Determin- istic spreading sequences are used and the pdfs of each in- terferer's multiple access interference (MAI) are determined as a function of timing offset. A Nakagami-m distribution is tted to the pdf of the total MAI power and the BER pdf is obtained directly from this Nakagami-m pdf. Both Walsh-Hadamard (WH) and Gold sequences are analyzed and the mean BERs are compared amongst the two multiple access systems for both sets of spreading sequences of vary- ing lengths. The results suggest a higher resistance to MAI in the MC-CDMA technique for the considered environment.
Year
Venue
Keywords
2004
European Signal Processing Conference
gold codes,hadamard transforms,nakagami channels,code division multiple access,error statistics,m-sequences,probability,ber pdf,dscdma systems,gold sequences,mai,mc-cdma systems,nakagami-m distribution,nakagami-m pdf,walsh-hadamard sequences,asynchronous multicarrier code division multiple access systems,bit-error-rate probability density functions,channel distortion,deterministic spreading sequences,direct-sequence code division multiple access systems,multiple access interference,statistical modeling,timing misalignments,uplink channel
Field
DocType
ISBN
Asynchronous communication,Computer science,Communication channel,Algorithm,Real-time computing,Nakagami distribution,Interference (wave propagation),Code division multiple access,Distortion,Probability density function,Offset (computer science)
Conference
978-320-0001-65-7
Citations 
PageRank 
References 
0
0.34
4
Authors
3
Name
Order
Citations
PageRank
Daniel Carey110.72
Bouchra Senadji218620.93
Daniel Roviras342453.96