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A linear precoding approach to resolve ambiguity of blind decoding of orthogonal space-time block codes in slowly fading channels

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3 Author(s)
ShahbazPanahi, S. ; Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada ; Gershman, A.B. ; Manton, J.H.

In our earlier work [Shahbazapnahi, S et al., (2004)], we have developed a new approach to estimate the channel matrix in orthogonal space-time block code (OSTBC) based communication systems. This approach can be used to decode most OSTBCs in a completely blind fashion. However, there are a few OSTBCs for which the aforementioned technique does not work because of the channel nonidentifiability. We first study the channel estimation ambiguity for the OSTBCs which is caused by such a nonidentifiability. We then propose a simple linear precoding technique which resolves this ambiguity.

Published in:

Signal Processing Advances in Wireless Communications, 2004 IEEE 5th Workshop on

Date of Conference:

11-14 July 2004

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