Achieving space and time diversity by using lattice constellation based joint alamouti coding

Authors:
Wei Liu;Mathini Sellathurai;Chaojing Tang;Jibo Wei
Affiliations:
School of Electronic Science and Engineering, National University of Defense Technology, Changsha, China;Institute of Electronics, Communications, and Information Technology, Queen's University of Belfast, Belfast, UK;School of Electronic Science and Engineering, National University of Defense Technology, Changsha, China;School of Electronic Science and Engineering, National University of Defense Technology, Changsha, China
Venue:
IEEE Communications Letters
Year:
2010

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Abstract

In this letter, we propose a simple space-time code to simultaneously achieve both the space and time diversities over time dispersive channels by using two-dimensional lattice constellations and Alamouti codes. The proposed scheme still reserves full space diversity and double-real-symbols joint maximum likelihood decoding which has the similar computation complexity as the Alamouti code.