Title :
Effect of DC Offset on OFDM System with Zero-Padded Suffix
Author_Institution :
Sch. of Electr., Comput. & Telecommun. Eng., Wollongong Univ., NSW
fDate :
Oct. 18 2006-Sept. 20 2006
Abstract :
The effect of direct current (DC) offset on orthogonal frequency division multiplexing (OFDM) system with zero-padded (ZP) suffix is analysed in this paper. It is found that the ZP appended OFDM system suffers more from DC offset than a cyclic prefix inserted OFDM system and even demonstrates bit error flooring if the DC power exceeds a maximum allowed threshold. Simple algorithms are also proposed for DC offset estimation and compensation. The analysis is confirmed by simulation using multiband OFDM specification for ultra-wideband application
Keywords :
OFDM modulation; ultra wideband communication; DC offset estimation; OFDM system; bit error flooring; direct current offset; maximum allowed threshold; multiband OFDM; orthogonal frequency division multiplexing; ultra-wideband application; zero-padded suffix; Digital video broadcasting; Fast Fourier transforms; Intersymbol interference; OFDM; Power system modeling; RF signals; Radio frequency; Radio transmitters; Telecommunication computing; Ultra wideband technology;
Conference_Titel :
Communications and Information Technologies, 2006. ISCIT '06. International Symposium on
Conference_Location :
Bangkok
Print_ISBN :
0-7803-9741-X
Electronic_ISBN :
0-7803-9741-X
DOI :
10.1109/ISCIT.2006.340000
