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

fYear

2008

fDate

21-23 July 2008

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/SAM.2008.4606811

Filename

4606811