New Results in Unitary Space-time Code Construction and Comparison to Upper Bounds

Abstract

Unitary space-time codes are a coding technique for unknown (i.e. non-coherent) multiple-input multiple-output (MIMO) channels. the unitary constellation symbol-error rate performance is determined by the the diversity product and diversity sum metrics of the constellation. Numerous techniques have been presented over the last few years for constructing unitary space-time codes with continually improving diversity products and sums. Other work has focused on determining bounds on the the optimal diversity product and sum for a given number of transmit antennas and constellation size. This paper presents a comprehensive survey of known construction techniques and bounds for unitary space-time codes, and also reports a variety of new constellations that have been constructed with improved diversity product or sum. These new constellations are documented along with a list of the currently best known codes and bounds. in many cases, a large gap between the bound and best known constellation exist. This result suggests areas of focus for improved constructions or tighter bounds. © International Foundation for Telemetering, 2008.

Department(s)

Electrical and Computer Engineering

International Standard Serial Number (ISSN)

0884-5123

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 International Foundation for Telemetering, All rights reserved.

Publication Date

01 Dec 2008

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