Coherent and Differential ICI Cancellation for Mobile OFDM with Application to DVB-H

Author

Lu, Sili ; Al-Dhahir, Naofal

Author_Institution

Univ. of Texas at Dallas, Dallas, TX

Volume

7

Issue

11

fYear

2008

fDate

11/1/2008 12:00:00 AM

Firstpage

4110

Lastpage

4116

Abstract

We develop a reduced-complexity hybrid frequency/time-domain orthogonal frequency division multiplexing (OFDM) channel estimation algorithm for high-mobility scenarios where the channel varies significantly within each OFDM block, resulting in severe intercarrier interference (ICI). The algorithm exploits the banded and symmetric structure of the channel matrix in the frequency domain and its sparse structure in the time-domain to achieve significant complexity reductions, which we quantify for the Digital Video Broadcasting-Handheld (DVB-H) system. Furthermore, we compare coherent and differential mobile OFDM detection for DVB-H.

Keywords

OFDM modulation; channel estimation; digital video broadcasting; frequency-domain analysis; intercarrier interference; interference suppression; mobile television; sparse matrices; time-domain analysis; DVB-H; coherent ICI cancellation; differential ICI cancellation; digital video broadcasting-handheld system; frequency domain channel estimation algorithm; intercarrier interference; mobile OFDM; sparse channel matrix; time-domain channel estimation algorithm; Channel estimation; Delay estimation; Digital video broadcasting; Equalizers; Finite impulse response filter; Frequency domain analysis; Frequency estimation; OFDM; Sparse matrices; Time domain analysis; ICI mitigation; OFDM; channel estimation; doppler shift;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/T-WC.2008.070591

Filename

4684586