Smith, David; Hanlen, Leif
We present two unitary space-time signal designs for two or more transmit antennas. The first design is a reparametrisation of rotation matrices applied to diagonal matrices to form unitary space-time codes. The rotation matrices are applied as matrices similar to Alamouti-style block codes. The second design subsumes rotation matrices applied to diagonal matrices for two antennas. These designs are applied in a non-coherent/differential framework. Optimisation of constellations is performed...[Show more]
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