Paper Info
Title
Reducing the out-of-band radiation of OFDM using an extended guard interval
Abstract
We investigate the spectrum, out-of-band radiation (OBR) and the use of extended guard interval (EGI) to reduce the out-of-band radiation of an OFDM signal when passing through different nonlinear devices. Spectra of the OFDM signal with different EGI lengths after passing through nonlinear devices are obtained through computer simulations. Mathematical expressions for the power spectral density of a conventional OFDM signal and an OFDM signal with different EGI lengths are also presented. Theoretical and simulated results are compared. Although the EGI reduces the OBR, this reduction is not significant in some cases. The effect of EGI on the OBR of an OFDM signal differs for different nonlinear devices. The EGI is also not capable of reducing the OBR caused by excessive clipping of the OFDM signal. Finally, it is also found that the length of the EGI does not have a considerable effect on the amount of OBR reduced when passing through a nonlinear device
Year
DOI
Venue
2001
10.1109/VTC.2001.956888
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Keywords
Field
DocType
ofdm modulation,data communication,radio links,spectral analysis,ofdm,extended guard interval,high-bit-rate data transmission,nonlinear devices,out-of-band radiation,power spectral density,radio environment,signal clipping
Nonlinear system,Expression (mathematics),Spectral line,Electronic engineering,Spectral density,Guard interval,Out of band radiation,Engineering,Radiation,Orthogonal frequency-division multiplexing
Conference
Volume
ISSN
ISBN
2
1090-3038
0-7803-7005-8
Citations 
PageRank 
References 
10
0.90
8
Authors
2
Name
Order
Citations
PageRank
Dhammika Jayalath119720.50
C. Tellambura24889374.02