Title :
Analysis of OFDM Receiver with Insufficient Guard Interval
Author :
Zhang, Zhonghao ; Li, Baojin ; Chang, Yongyu ; Yang, Dacheng
Author_Institution :
Wireless Theor. & Technol. Lab. (WT&T), Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
In this paper, we propose a novel receiver consists of the Inter Symbol Interference (ISI) canceller and the turbo equalizer for orthogonal frequency division multiplexing (OFDM) systems over frequency selective fading channels where the multipath delay exceeds the guard interval duration. The proposed turbo equalization algorithm performs soft Inter Carrier Interference (ICI) cancellation and frequency domain minimum mean-square error (MMSE) filtering to minimize the performance degradation caused by ICI distortion and frequency-selective channels. Simulation results of the system performance show that the proposed receiver effectively recovers the contaminated OFDM signals.
Keywords :
OFDM modulation; equalisers; fading channels; intercarrier interference; intersymbol interference; radio receivers; ICI cancellation; ISI canceller; OFDM receiver; OFDM systems; frequency domain minimum mean-square error filtering; frequency selective fading channel; insufficient guard interval; intercarrier interference; intersymbol interference; multipath delay; orthogonal frequency division multiplexing; turbo equalizer; Degradation; Delay; Equalizers; Fading; Filtering algorithms; Frequency domain analysis; Interference cancellation; Intersymbol interference; OFDM; System performance;
Conference_Titel :
Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE
Conference_Location :
Budapest
Print_ISBN :
978-1-4244-2947-9
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2009.4917593
