Presentation	2004/3/8 Unitary Space-Time Coding and its Applications Tatsumi KONISHI,
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Abstract(in English)	In recent years, a wealth of space-time coding and modulation techniques have been proposed. Most work has focused on the coherent case, however, several authors have introduced interest techniques for the noncoherent case where neither the transmitter nor the receiver knows the fading coefficients. For example, for large SNRs, differential unitary space-time modulation approaches the capacity of the multiantenna fading channel. However, differential space-time codes are not regarded as optimal technique for mobile communications. Therefore, we consider whether differential unitary space-time codes are appropriate for MIMO mobile systems. Moreover, we present a new differential unitary space-time code at low SNRs.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	differential space-time codes / fading channels / unitary group / low SNR / Bruhat decomposition
Paper #	IT2003-68,ISEC2003-108,WBS2003-186
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Conference Information
Committee	ISEC
Conference Date	2004/3/8(1days)
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Paper Information
Registration To	Information Security (ISEC)
Language	ENG
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Unitary Space-Time Coding and its Applications
Sub Title (in English)
Keyword(1)	differential space-time codes
Keyword(2)	fading channels
Keyword(3)	unitary group
Keyword(4)	low SNR
Keyword(5)	Bruhat decomposition
1st Author's Name	Tatsumi KONISHI
1st Author's Affiliation	Aichi Institute of Technology()
Date	2004/3/8
Paper #	IT2003-68,ISEC2003-108,WBS2003-186
Volume (vol)	vol.103
Number (no)	712
Page	pp.pp.-
#Pages	4
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