Channel estimation for OFDM systems based on bispectrum of pilot tones in fast fading channels

Author

Li, Dan-Ping ; Zhang, Hai-lin

Author_Institution

Nat. Key Lab. of Integrated Service Networks, Xidian Univ., Xi´´an, China

Volume

2

fYear

2004

fDate

31 Aug.-4 Sept. 2004

Firstpage

1649

Abstract

In this paper, a novel bispectrum-based channel estimation algorithm for orthogonal frequency division multiplexing (OFDM) system in fast fading channels is proposed. As the bispectrum of Gaussian noise is zero, the noisy channel estimate of pilot tones obtained from LS method can be improved significantly by bispectrum-filtering. The proposed algorithm can accurately estimate the channel response in the presence of additive white Gaussian noise (AWGN) and intercarrier interference (ICI) without the knowledge of channel statistics. Simulation results in terms of bit error rate (BER) demonstrate the effectiveness of the proposed algorithm.

Keywords

AWGN channels; OFDM modulation; channel estimation; error statistics; fading channels; interference (signal); AWGN; BER; ICI; OFDM systems; additive white Gaussian noise; channel estimation; fading channels; intercarrier interference; orthogonal frequency division multiplexing; pilot tones bispectrum; AWGN; Additive white noise; Bit error rate; Channel estimation; Fading; Frequency estimation; Gaussian noise; Interference; OFDM; Statistics;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing, 2004. Proceedings. ICSP '04. 2004 7th International Conference on

Print_ISBN

0-7803-8406-7

Type

conf

DOI

10.1109/ICOSP.2004.1441649

Filename

1441649