Low-complexity detection of OFDM in doubly-dispersive channels

Author

Schniter, Philip ; D´Silva, Siddharth

Author_Institution

Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA

Volume

2

fYear

2002

fDate

3-6 Nov. 2002

Firstpage

1799

Abstract

When OFDM systems with large block length are used in fast-fading multipath channels, the channel may induce significant intercarrier interference (ICI). As a result, the standard ML, MMSE and ZF detectors become prohibitively complex. In response, we propose a computationally-efficient decision-feedback detection strategy based on optimal windowing and linear MMSE estimation. Simulation results indicate good performance relative to the standard MMSE detector but with significant computational savings.

Keywords

OFDM modulation; demodulation; dispersive channels; fading channels; least mean squares methods; multipath channels; radiofrequency interference; signal detection; ICI; ML detector; MMSE detector; OFDM detection; ZF detector; decision-feedback detection; doubly-dispersive channels; fast-fading channels; frequency-selective channels; intercarrier interference; linear MMSE estimation; multipath channels; optimal windowing; time-selective channels; Bandwidth; Broadband communication; Computational modeling; Detectors; Fading; Frequency conversion; OFDM; Quadrature amplitude modulation; Time domain analysis; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-7576-9

Type

conf

DOI

10.1109/ACSSC.2002.1197084

Filename

1197084