A pre-FFT OFDM adaptive antenna array based on beam-space channel estimation

Author

Liu, Bo ; Jin, Ronghong ; Fan, Yu

Author_Institution

Dept. of Electron. Eng., Shanghai Jiao Tong Univ., China

Volume

3

fYear

2004

fDate

20-25 June 2004

Firstpage

2671

Abstract

The adaptive antenna array used in OFDM systems has been an interesting topic in recent years. A modified pre-FFT antenna array scheme is proposed, in which the beam-space channel state information (CSI) estimation is adopted. A uniform linear antenna array is considered. It is confirmed by simulations that the proposed scheme performs much better than the element-space one, especially when strong interference is present. In the element-space scheme, CSI estimation is made on the array elements, which is not robust and is likely to fail under strong interference.

Keywords

OFDM modulation; adaptive antenna arrays; array signal processing; channel estimation; fast Fourier transforms; linear antenna arrays; radiofrequency interference; CSI estimation; OFDM adaptive antenna array; beam-space channel estimation; channel state information estimation; modified pre-FFT antenna array scheme; uniform linear antenna array; Adaptive arrays; Antenna arrays; Background noise; Channel estimation; Chaos; Discrete transforms; Eigenvalues and eigenfunctions; Interference; OFDM; Signal generators;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2004. IEEE

Print_ISBN

0-7803-8302-8

Type

conf

DOI

10.1109/APS.2004.1331924

Filename

1331924