Time-Frequency Channel Equalization for OFDM Communication Systems

Author

Önen, Erol ; Akan, Aydin ; Chaparro, Ve Luis F.

Author_Institution

Istanbul Univ., Istanbul, Turkey

fYear

2007

fDate

11-13 June 2007

Firstpage

1

Lastpage

4

Abstract

In this paper, we present a computationally efficient, time-frequency (TF) based channel estimation method for OFDM channels whose frequency response may be changing over a single transmit symbol. The discrete evolutionary transform is used to obtain a complete model of a multi-path, fading and frequency selective channel. A TF receiver is designed to detect the sent data by using estimated channel parameters. Performance of the proposed method is tested on different levels of channel noise, and Doppler frequency shifts.

Keywords

OFDM modulation; channel estimation; discrete transforms; equalisers; evolutionary computation; fading channels; multipath channels; radio receivers; time-frequency analysis; Doppler frequency shifts; OFDM channels; OFDM communication systems; TF receiver; channel noise; channel parameter estimation; discrete evolutionary transform; fading channel; frequency response; frequency selective channel; multipath channels; time-frequency channel equalization; time-frequency channel estimation method; Discrete transforms; Fading; Frequency estimation; Frequency response; Intersymbol interference; Noise level; OFDM; Parameter estimation; Testing; Time frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Communications Applications, 2007. SIU 2007. IEEE 15th

Conference_Location

Eskisehir

Print_ISBN

1-4244-0719-2

Electronic_ISBN

1-4244-0720-6

Type

conf

DOI

10.1109/SIU.2007.4298558

Filename

4298558