Title :
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
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;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.797360
