A subspace approach to blind space-time signal processing forwireless communication systems
van der Veen, A.-J.
Talwar, S.
Paulraj, A.
Dept. of Electr. Eng., Delft Univ. of Technol. ;
This paper appears in: Signal Processing, IEEE Transactions on
Publication Date: Jan 1997
Volume: 45,
Issue: 1
On page(s): 173-190
ISSN: 1053-587X
References Cited: 39
CODEN: ITPRED
INSPEC Accession Number: 5488584
Digital Object Identifier: 10.1109/78.552215
Current Version Published: 2002-08-06
Abstract
The two key limiting factors facing wireless systems today are
multipath interference and multiuser interference. In this context, a
challenging signal processing problem is the joint space-time
equalization of multiple digital signals transmitted over multipath
channels. We propose a blind approach that does not use training sets to
estimate the transmitted signals and the space-time channel. Instead,
this approach takes advantage of spatial and temporal oversampling
techniques and the finite alphabet property of digital signals to
determine the user symbol sequences. The problem of channels with
largely differing and ill-defined delay spreads is discussed. The
proposed approach is tested on actual channel data
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