Paper Info
Title
Spectral efficiency for FDMA and DS-CDMA in cellular systems
Abstract
The spectral efficiency achieved by FDMA and DS-CDMA schemes during cellular operation in an additive white Gaussian noise (AWGN) and a Rayleigh fading environment is evaluated in terms of the assigned downlink and uplink channel capacity (in the Shannon sense). In particular, in Rayleigh fading, channel capacity is estimated in an average sense considering the inherent diversity potential that each scheme provides as a physical means for fading mitigation. However, in contrast to cellular FDMA, multiple-access and co-channel interference that are present in cellular DS-CDMA cause substantial spectral efficiency reduction. Hence, it is analytically shown that, under normalized conditions, FDMA spectral efficiency is always higher than that of DS-CDMA regardless the fact that DS-CDMA systems reduce the channel capacity degradation that is caused by signal fading
Year
DOI
Venue
1998
10.1109/PIMRC.1998.731351
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium
Keywords
DocType
Volume
awgn,rayleigh channels,cellular radio,channel capacity,cochannel interference,code division multiple access,diversity reception,frequency division multiple access,multiuser channels,radio links,spectral analysis,spread spectrum communication,ds-cdma,fdma,rayleigh fading,shannon capacity,additive white gaussian noise,average,cellular systems,co-channel interference,diversity,downlink channel capacity,multiple-access interference,normalized conditions,signal fading,spectral efficiency,uplink channel capacity,degradation,signal analysis,downlink,co channel interference
Conference
3
ISBN
Citations 
PageRank 
0-7803-4872-9
0
0.34
References 
Authors
0
2
Name
Order
Citations
PageRank
P. Varzakas1366.51
George S. Tombras240143.59