Title :
A comparative study of blind channel identification methods for Alamouti coded systems over indoor transmissions at 2.4 GHz
Author :
García-Naya, José A. ; Pérez-Iglesias, Héctor J. ; Dapena, Adriana ; Castedo, Luis
Author_Institution :
Dept. de Electron. y Sist., Univ. da Coruna, A Coruna
Abstract :
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.
Keywords :
channel estimation; eigenvalues and eigenfunctions; higher order statistics; indoor communication; receiving antennas; Alamouti coded channel matrix; blind channel identification; eigendecomposition; frequency 2.4 GHz; high order statistics; indoor transmissions; line of sight; receiving antenna; AWGN; Blind equalizers; Diversity methods; Least squares approximation; MIMO; Maximum likelihood decoding; Receiving antennas; Statistics; Testing; Transmitting antennas;
Conference_Titel :
Sensor Array and Multichannel Signal Processing Workshop, 2008. SAM 2008. 5th IEEE
Conference_Location :
Darmstadt
Print_ISBN :
978-1-4244-2240-1
Electronic_ISBN :
978-1-4244-2241-8
DOI :
10.1109/SAM.2008.4606811
