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Receiver design for orthogonal space-time block coding for four transmit antennas over time-selective fading channels

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2 Author(s)
Zheng, F.-C. ; Dept. of Electron., York Univ., UK ; Burr, A.G.

A key assumption in all orthogonal space-time block coding (O-STBC) schemes is that the channel remains static over the length of the codeword. However, time selective fading channels do exist, and in such case the conventional O-STBC receiver will not function properly: even a relatively small variation in channel state can result in a large error floor. This paper presents an effective solution to this issue for the case of four transmit antennas. At the receiver, a simple zero forcing decoder is derived. To improve the performance of the decoder under certain channel conditions, the original O-STBC encoder is also modified accordingly. Computer simulations confirmed the effectiveness of the new procedure.

Published in:

Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE  (Volume:1 )

Date of Conference:

1-5 Dec. 2003

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