Power-Efficient Non-coherent Space-Time Constellations

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dc.citation.bibtexNameinproceedingsen_US
dc.citation.conferenceNameIEEE Symposium on Information Theoryen_US
dc.citation.firstpage208en_US
dc.citation.lastpage208en_US
dc.citation.locationYokohama, Japanen_US
dc.contributor.authorBorran, Mohammad Jaberen_US
dc.contributor.authorSabharwal, Ashutoshen_US
dc.contributor.authorAazhang, Behnaamen_US
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)en_US
dc.date.accessioned2007-10-31T00:37:52Zen_US
dc.date.available2007-10-31T00:37:52Zen_US
dc.date.issued2003-07-20en_US
dc.date.modified2003-12-02en_US
dc.date.note2003-01-07en_US
dc.date.submitted2003-07-20en_US
dc.descriptionConference Paperen_US
dc.description.abstractWe consider the problem of digital communication in a Rayleigh flat-fading environment using a multiple-antenna system, when the channel state information is available neither at the transmitter nor at the receiver. It is known that at high SNR, or when the coherence interval is much larger than the number of transmit antennas, a constellation of unitary matrices can achieve the capacity of the non-coherent system. However, at low SNR, high spectral efficiencies, or for small values of coherence interval, the unitary constellations lose their optimality and fail to provide an acceptable performance. In an earlier work, using a design criterion based on the KL distance between distributions, we have shown, for the case of a single transmit antenna, that at low SNR, a multilevel constellation can provide better error rate performance than the unitary constellation of the same size. In this work, we extend those single antenna results to the case of multiple transmit antennas. The interesting result of this work is that the same idea of multilevel constellations can be generalized to design low-power non-coherent constellations for multiple antennas. The resulting constellations overlap with the unitary constellations at high SNR, but at low SNR they have a multilevel structure and show significant performance improvement over unitary constellations of the same size. The performance improvement becomes especially more significant when a large number of receive antennas are used. This property, together with the facts that the proposed constellations eliminate the need for training sequences and are most suitable for low SNR, makes them a good candidate for uplink communication in wireless systems.en_US
dc.description.sponsorshipNokiaen_US
dc.identifier.citationM. J. Borran, A. Sabharwal and B. Aazhang, "Power-Efficient Non-coherent Space-Time Constellations," 2003.en_US
dc.identifier.urihttps://hdl.handle.net/1911/19748en_US
dc.language.isoengen_US
dc.subjectNon-coherent constellationsen_US
dc.subjectspace-time codesen_US
dc.subjectmultiple antenna systemsen_US
dc.subjectfading channelsen_US
dc.subjectchannel codingen_US
dc.subjectwireless communicationsen_US
dc.subject.keywordNon-coherent constellationsen_US
dc.subject.keywordspace-time codesen_US
dc.subject.keywordmultiple antenna systemsen_US
dc.subject.keywordfading channelsen_US
dc.subject.keywordchannel codingen_US
dc.subject.keywordwireless communicationsen_US
dc.titlePower-Efficient Non-coherent Space-Time Constellationsen_US
dc.typeConference paperen_US
dc.type.dcmiTexten_US
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