ISSN : 1796-2021
Volume : 4    Issue : 1    Date : February 2009

On an Orthogonal Space-Time-Polarization Block Code
Beata J. Wysocki, Tadeusz A. Wysocki, and Sarah Spence Adams
Page(s): 20-25
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Over the past several years, diversity methods such as space, time, and polarization diversity have
been successfully implemented in wireless communications systems. Orthogonal space-time
block codes efficiently combine space and time diversity, and they have been studied in detail.
Polarization diversity has also been studied, however it is usually considered in a simple
concatenation with other coding methods. In this paper, an efficient method for incorporating
polarization diversity with space and time diversity is studied. The simple yet highly efficient
technique is based on extending orthogonal space-time block codes into the quaternion domain
and utilizing a description of the dual-polarized signal by means of quaternions. The resulting
orthogonal space-timepolarization block codes have given promising results in simulations. In the
example described in this paper, the achievable performance gain for two transmit and one receive
antennas is approximately 6 dB at a bit error rate of 10-4 when compared with the Alamouti code.

Index Terms
polarization diversity, space-time processing, quaternions, block codes