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Square-matrix embeddable space-time block codes for complex signal constellations

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2 Author(s)
Tirkkonen, O. ; Nokia Res. Center, Espoo, Finland ; Hottinen, A.

Space-time block codes for providing transmit diversity in wireless communication systems are considered. Based on the principles of linearity and unitarity, a complete classification of linear codes is given in the case when the symbol constellations are complex, and the code is based on a square matrix or restriction of such by deleting columns (antennas). Maximal rate delay optimal codes are constructed within this category. The maximal rates allowed by linearity and unitarity fall off exponentially with the number of transmit antennas

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Information Theory, IEEE Transactions on  (Volume:48 ,  Issue: 2 )