Blind multichannel estimation exploiting the finite symbol alphabet

Ayadi, Jaouhar;Slock, Dirk T M
EUSIPCO 1998, European association for signal processing, September 8-11, 1998, Island of Rhodes, Greece

Unlike the recent works dealing with purely blind channel estimation algorithms that are based on the second-order statistics of the received signal, in this paper we address the exploitation of the finite alphabet of the transmitted symbols to improve the blind estimation performance of the channel. The incorporation of the finite alphabet nature leads the symbols present in the problem to act as a training sequence for the channel estimation. Hence, a blind approach that exploits the symbol alphabet outperforms its purely blind version. We propose to incorporate the prior knowledge of the finite alphabet by combining a purely blind channel estimation criterion with a decision-directed linear MMSE equalization criterion. This combined criterion corresponds to an optimally weighted least-squares approach. Simulation results demonstrate that significant improvement can be obtained by exploiting the finite symbol alphabet.


Type:
Conférence
City:
Island of Rhodes
Date:
1998-09-11
Department:
Systèmes de Communication
Eurecom Ref:
329
Copyright:
© EURASIP. Personal use of this material is permitted. The definitive version of this paper was published in EUSIPCO 1998, European association for signal processing, September 8-11, 1998, Island of Rhodes, Greece and is available at :

PERMALINK : https://www.eurecom.fr/publication/329