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

Volume

6

fYear

2001

fDate

2001

Firstpage

1950

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2001. ICC 2001. IEEE International Conference on

Conference_Location

Helsinki

Print_ISBN

0-7803-7097-1

Type

conf

DOI

10.1109/ICC.2001.937130

Filename

937130