Closed-form channel estimation for blind decoding of orthogonal space-time block codes

A new computationally simple approach to blind decoding of orthogonal space-time block codes is proposed. Our approach estimates the channel matrix in a closed form and uses this estimate in the maximum likelihood (ML) receiver to decode the symbols. It exploits specific properties of the orthogonal space-time block codes (STBCs) and is free of most of the shortcomings of other blind space-time decoding schemes.

[1]  Thomas L. Marzetta,et al.  Unitary space-time modulation for multiple-antenna communications in Rayleigh flat fading , 2000, IEEE Trans. Inf. Theory.

[2]  Siavash M. Alamouti,et al.  A simple transmit diversity technique for wireless communications , 1998, IEEE J. Sel. Areas Commun..

[3]  Bertrand M. Hochwald,et al.  Differential unitary space-time modulation , 2000, IEEE Trans. Commun..

[4]  M. Gharavi-Alkhansari,et al.  Constellation space invariance of space-time block codes with application to optimal ML decoding , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).

[5]  Jonathan H. Manton,et al.  Optimization algorithms exploiting unitary constraints , 2002, IEEE Trans. Signal Process..

[6]  P. Stoica,et al.  Space-time block codes: ML detection for unknown channels and unstructured interference , 2001, Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256).

[7]  A. Robert Calderbank,et al.  Space-Time block codes from orthogonal designs , 1999, IEEE Trans. Inf. Theory.

[8]  A. Lee Swindlehurst,et al.  Blind and semi-blind equalization for generalized space-time block codes , 2002, IEEE Trans. Signal Process..

[9]  Hamid Jafarkhani,et al.  Multiple transmit antenna differential detection from generalized orthogonal designs , 2001, IEEE Trans. Inf. Theory.

[10]  Petre Stoica,et al.  Space-Time Block Codes: Trained, blind and semi-blind detection , 2002, 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[11]  Erik G. Larsson,et al.  Orthogonal space-time block codes: maximum likelihood detection for unknown channels and unstructured interferences , 2003, IEEE Trans. Signal Process..

[12]  Petre Stoica,et al.  Space-Time block codes: A maximum SNR approach , 2001, IEEE Trans. Inf. Theory.