J. García-Naya, Héctor J. Pérez-Iglesias, A. Dapena, L. Castedo
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A comparative study of blind channel identification methods for Alamouti coded systems over indoor transmissions at 2.4 GHz
This paper focuses on blind channel estimation in Alamouti coded systems with one receiving antenna. We present a comparative study of several blind channel estimation techniques, based on high order statistics (HOS) and second order statistics (SOS), in realistic indoor scenarios. These methods are based on eigendecomposition of a square matrix formed with statistics of the observed signals. They also exploit the orthogonality property of the Alamouti coded channel matrix. Experimental evaluation is carried out using a MIMO testbed at the 2.4 GHz band. The results show the excellent performance of the SOS-based blind channel estimation technique in either line of sight (LOS) and Non-LOS (NLOS) indoor scenarios.
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