On identifiability of OFDM blind channel estimation

Author

Chotikakamthorn, Nopporn ; Suzuki, Hiroshi

Author_Institution

Fac. of Inf. Technol., King Mongkut´´s Inst. of Technol., Bangkok, Thailand

Volume

4

fYear

1999

fDate

1999

Firstpage

2358

Abstract

The technique of orthogonal frequency division multiplexing (OFDM) has received much attention as a promising scheme for use in future wireless mobile communications. A problem of blind channel estimation for coherent detection in OFDM systems is considered. It is shown in this paper that the channel is identifiable, given only a received data set obtained over one OFDM symbol duration. A sufficient condition for the channel to be identifiable is given, with outline of the proof included. In addition, a compact form of the maximum likelihood channel estimator for a PSK modulation scheme is derived. Experimental results are provided to demonstrate the performance of the proposed method

Keywords

OFDM modulation; blind equalisers; maximum likelihood detection; maximum likelihood estimation; mobile radio; parameter estimation; phase shift keying; OFDM; PSK modulation; blind channel estimation; coherent detection; identifiability; maximum likelihood channel estimator; orthogonal frequency division multiplexing; performance; received data set; symbol duration; wireless mobile communications; Blind equalizers; Channel estimation; Equations; Fading; Information technology; Mobile communication; OFDM modulation; Parameter estimation; Phase shift keying; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.797360

Filename

797360