Code Combination for Blind Channel Estimation in General MIMO-STBC Systems

The problem of blind channel estimation under space-time block coded (STBC) transmissions is addressed. Firstly, a blind channel estimation criterion that generalizes previous works is proposed. The technique is solely based on second-order statistics (SOS) and if the channel is identifiable, the es...

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Bibliographic Details
Published in:EURASIP journal on advances in signal processing 2009-01, Vol.2009 (1), Article 103483
Main Authors: Via, Javier, Santamaria, Ignacio, Perez, Jesus
Format: Article
Language:English
Subjects:
Engineering
Quantum Information Technology
Research Article
Signal,Image and Speech Processing
Spintronics
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Summary:The problem of blind channel estimation under space-time block coded (STBC) transmissions is addressed. Firstly, a blind channel estimation criterion that generalizes previous works is proposed. The technique is solely based on second-order statistics (SOS) and if the channel is identifiable, the estimate is obtained as the main eigenvector of a generalized eigenvalue problem (GEV). Secondly, a new transmission technique is proposed to solve the indeterminacies associated to the blind channel estimation problem. The technique is based on the combination of different STBCs, and it can be reduced to a nonredundant precoding consisting in the rotation or permutation of the transmit antennas. Unlike other previous approaches, the proposed technique does not imply a penalty in the transmission rate or capacity of the STBC system, while it is able to avoid the ambiguities in many practical cases, which is illustrated by means of some simulation examples.
ISSN:1687-6180
1687-6172
1687-6180
DOI:10.1155/2009/103483