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| An Orthogonal Space-Time Block Code Based on Matrix Rotation |
| Wang Lei; Zhu Shi-hua; Wang Jun |
| Dept of Information and Communications Engineering Xi’an Jiaotong University Xi’an 710049 China |
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Abstract According to the theory of orthogonal designs, Tarokh et al.(1999) proved that a complex orthogonal space-time block code that provides full diversity and full transmission rate is not feasible for more than two antennas. Whereas the non-orthogonal space-time block codes which obtain higher transmission rate at the cost of orthogonality and partial diversity gain may degrade the performance. By rotating the channel correlation matrix of the non-orthogonal space-time block code, this paper proposes an orthogonal rate-one space-time block code which provides partial diversity but can be linearly decoded at the receiver. Simulation results show that the scheme has better Bit Error Rate (BER.) performance compared to the existing typical codes.
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Received: 09 October 2003
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2005, Vol. 27 
