Title :
Equalization of OFDM-systems by interference cancellation techniques
Author :
Toeltsch, Martin ; Molisch, Andreas F.
Author_Institution :
Inst. fur Nachrichtentech. und Hochfrequenztech., Tech. Univ. Wien, Austria
Abstract :
Intercarrier interference can be a dominant source of errors in OFDM-systems, requiring some sort of equalization. We show that serial and parallel interference cancellation techniques, which were originally developed for CDMA multiuser techniques, can be used for OFDM equalization and are much more efficient than a brute force inversion of the channel matrix. Maximum excess delays of up to 70% of the OFDM block duration can be handled without loss of performance
Keywords :
OFDM modulation; delays; dispersive channels; equalisers; interference suppression; matrix algebra; radiofrequency interference; BPSK; CDMA multiuser techniques; ISI; OFDM block duration; OFDM-systems equalization; channel matrix inversion; computational complexity; data transmission; dispersive channels; intercarrier interference; intersymbol interference; maximum excess delays; parallel interference cancellation; serial interference cancellation; Convolution; Delay; Fading; Interference cancellation; Intersymbol interference; Multiaccess communication; OFDM modulation; Performance loss; Pulse shaping methods; Robustness;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.937130
