Frame-oriented channel estimation for UTRA/FDD with LSE polynomial fitting

Author

Popper, Ambroise ; Ani, Elie Bejj ; de Cacqueray, Benoît ; Bouquier, Jean-François ; Jeschke, Michael

Author_Institution

Corp. Res. Center, Alcatel, Nanterre, France

Volume

3

fYear

2000

fDate

2000

Firstpage

2128

Abstract

Channel estimation is a crucial issue in CDMA systems and especially for UTRA/FDD. Many techniques have been proposed to perform enhanced channel estimation, in particular WMSA (weighted multi-slot averaging). This technique yields very satisfactory results, but it is not able to adapt to the speed of channel variations. We propose a frame-by-frame estimation technique. It determines a polynomial function fitting the noisy channel estimates in a least squares sense. Moreover it is able to adaptively choose the degree of the polynomial depending on the speed of channel variations. The obtained results show an SNR improvement up to 1 dB with respect to WMSA

Keywords

adaptive systems; cellular radio; code division multiple access; least squares approximations; multipath channels; multiuser channels; noise; parameter estimation; polynomials; CDMA systems; LSE polynomial fitting; SNR improvement; UTRA/FDD; adaptive polynomial fitting; channel variations speed; frame-oriented channel estimation; least squares method; multipath channel; noisy channel estimates; polynomial function; third generation cellular mobile radio; weighted multi-slot averaging; Bit error rate; Channel estimation; Filtering; Land mobile radio; Least squares approximation; Low pass filters; Neodymium; Polynomials; RAKE receivers; Speech;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st

Conference_Location

Tokyo

ISSN

1090-3038

Print_ISBN

0-7803-5718-3

Type

conf

DOI

10.1109/VETECS.2000.851648

Filename

851648