Differential unitary space-time signal designs with improved performance using parametric equivalence
✍ Scribed by Smith, David B. ;Hanlen, Leif W.
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 191 KB
- Volume
- 20
- Category
- Article
- ISSN
- 1124-318X
- DOI
- 10.1002/ett.1360
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✦ Synopsis
Abstract
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 using the union bound on block‐error probability, for which a new exact closed‐form expression is given. Both designs have superior block‐error performance over previous designs, and have similar performance to each other. Copyright © 2009 John Wiley & Sons, Ltd.