Title :
An effective scheme to improve performance of OFDM-based system
Author :
Zhou, Yong-Xing ; Bang, Ji-Hoon ; Lee, Dong-Jun ; Park, Jong-Ae ; Kim, Ki-Ho
Author_Institution :
Samsung Adv. Inst. of Technol., South Korea
Abstract :
This paper presents an effective scheme to improve performance of OFDM-based system. Besides synchronization errors, DC offset and mismatch of in-phase/quadrature (I/Q) modem are two major implementation effects resulting distortion of OFDM symbol. By utilizing digital IF technique combined with post-compensation in frequency domain, DC offset and intercarrier interference (ICI) caused by I/Q imbalance can be entirely eliminated. This scheme is illustrated with WLAN IEEE802.11a system.
Keywords :
OFDM modulation; distortion; frequency-domain analysis; interference suppression; modems; radiofrequency interference; synchronisation; wireless LAN; DC offset; OFDM-based system; WLAN IEEE802.11a system; digital IF technique; frequency domain post compensation; inphase/quadrature modem mismatch; intercarrier interference; intermediate frequency; synchronization error; DC generators; Digital filters; Intersymbol interference; Low pass filters; Modems; OFDM modulation; Peak to average power ratio; Radio frequency; Sampling methods; Wireless LAN;
Conference_Titel :
Communication Technology Proceedings, 2003. ICCT 2003. International Conference on
Print_ISBN :
7-5635-0686-1
DOI :
10.1109/ICCT.2003.1209743
