Differential Transmit Diversity Based on Quasi-Orthogonal Space-Time Block Code

Details Differential Transmit Diversity Based on Quasi-Orthogonal Space-Time Block Code Differential Transmit Diversity Based on Quasi-Orthogonal Space-Time Block Code

2008-06-20

arxiv.org/abs/0806.3317v1

Globecom 2004

Computer Science

Information Theory

Scientific paper

By using joint modulation and customized constellation set, we show that Quasi-Orthogonal Space-Time Block Code (QO-STBC) can be used to form a new differential space-time modulation (DSTM) scheme to provide full transmit diversity with non-coherent detection. Our new scheme can provide higher code rate than existing DSTM schemes based on Orthogonal STBC. It also has a lower decoding complexity than the other DSTM schemes, such as those based on Group Codes, because it only requires a joint detection of two complex symbols. We derive the design criteria for the customized constellation set and use them to construct a constellation set that provides a wide range of spectral efficiency with full diversity and maximum coding gain.

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