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Summary: Iterative Spatial Sequence Estimator for
Multi-Group Space Time Trellis Coded Systems
Samir Al-Ghadhban, Maruf Mohammad, and B. Woerner
Mobile and Portable Radio Research Group
Virginia Tech
E-Mail: {maruf, samir}@vt.edu
Abstract: In this paper, we will present and evaluate a new
detection algorithm for decoding multi-group space time trellis
coded systems. These systems consider a single user who
transmits simultaneously through K parallel space time trellis
encoders. Therefore, they can provide high spectral efficiencies
similar to the BLAST architecture plus transmit diversity
advantages and coding gains. The developed detector is called
maximum a posteriori spatial sequence estimator and it has the
flexibility of trading complexity with diversity advantage. The
algorithm could provide higher receive diversity with higher
complexity. The simulation result shows a performance
improvement of this new algorithm over interference nulling and
cancellation techniques.
keywords- Multi-layered STTC; Spatial multiplexing and transmit
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