A Fast Blind Channel Estimation Method For ZP-OFDM Systems

Author

Alayyan, Faisal O. ; Leung, Yee Hong ; Zoubir, Abdelhak M.

Author_Institution

Commun. & Signal Process. Group, Curtin Univ. of Technol., Bentley, WA

fYear

2005

fDate

17-20 July 2005

Firstpage

657

Lastpage

662

Abstract

We develop an adaptive blind channel estimation method for an OFDM system using zero padding based on the minimum noise subspace. By applying the gradient method, a new adaptive algorithm is derived that have a number of attractive properties such as low computational complexity and good numerical stability. We extend the idea of spatial diversity for the proposed system to obtain high performance in the presence of additive channel noise. A suitable pre-FFT zero-forcing linear equalizer is also proposed. It is shown that the proposed method is computationally more efficient than existing systems and is consider as a powerful tools for the spatial diversity

Keywords

OFDM modulation; blind equalisers; channel estimation; diversity reception; fast Fourier transforms; gradient methods; FFT zero-forcing linear equalizer; ZP-OFDM system; adaptive algorithm; blind channel estimation method; fast Fourier transform; gradient method; noise subspace method; orthogonal frequency division multiplexing; spatial diversity; zero padding system; Additive noise; Blind equalizers; Channel estimation; Finite impulse response filter; Intersymbol interference; Multimedia systems; OFDM; Receiving antennas; Transmitters; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Statistical Signal Processing, 2005 IEEE/SP 13th Workshop on

Conference_Location

Novosibirsk

Print_ISBN

0-7803-9403-8

Type

conf

DOI

10.1109/SSP.2005.1628676

Filename

1628676