Unitary subgroup space-time codes using Bruhat decomposition and Weyl groups

Authors:
T. Konishi
Affiliations:
Aichi Inst. of Technol., Japan
Venue:
IEEE Transactions on Information Theory
Year:
2003

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An application of the Bruhat decomposition to the design of full diversity unitary space-time codes

IEEE Transactions on Information Theory

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Abstract

We propose a new class of unitary subgroups which is suitable to make differential unitary space-time codes for fast fading channels. These subgroups are derived from a double coset decomposition of unitary groups called Bruhat decomposition. We give some examples of the proposed unitary subgroup space-time codes for phase-shift keying (PSK), and display the performance for Rayleigh-fading channels. Finally, we describe how the new space-time codes are combined with coded modulation systems.