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Full-rate full-diversity finite feedback space-time schemes with minimum feedback and transmission duration

Natarajan, Lakshmi Prasad and Rajan, Sundar B (2013) Full-rate full-diversity finite feedback space-time schemes with minimum feedback and transmission duration. In: IEEE Transactions on Wireless Communications, 12 (10). pp. 5022-5034.

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Official URL: http://dx.doi.org/ 10.1109/TWC.2013.090513.122003


A Finite Feedback Scheme (FFS) for a quasi-static MIMO block fading channel with finite N-ary delay-free noise-free feedback consists of N Space-Time Block Codes (STBCs) at the transmitter, one corresponding to each possible value of feedback, and a function at the receiver that generates N-ary feedback. A number of FFSs are available in the literature that provably attain full-diversity. However, there is no known full-diversity criterion that universally applies to all FFSs. In this paper a universal necessary condition for any FFS to achieve full-diversity is given, and based on this criterion the notion of Feedback-Transmission duration optimal (FT-optimal) FFSs is introduced, which are schemes that use minimum amount of feedback N for the given transmission duration T, and minimum T for the given N to achieve full-diversity. When there is no feedback (N = 1) an FT-optimal scheme consists of a single STBC, and the proposed condition reduces to the well known necessary and sufficient condition for an STBC to achieve full-diversity. Also, a sufficient criterion for full-diversity is given for FFSs in which the component STBC yielding the largest minimum Euclidean distance is chosen, using which full-rate (N-t complex symbols per channel use) full-diversity FT-optimal schemes are constructed for all N-t > 1. These are the first full-rate full-diversity FFSs reported in the literature for T < N-t. Simulation results show that the new schemes have the best error performance among all known FFSs.

Item Type: Journal Article
Publication: IEEE Transactions on Wireless Communications
Publisher: IEEE-Institute of Electrical and Electronics Engineers
Additional Information: Copyright of this article belongs to IEEE.
Keywords: Feedback-Transmission Duration Optimal (FT-Optimal); Finite Feedback; Full-Diversity; Full-Rate; Multiple-Input Multiple-Output (MIMO); Space-Time Block Code (STBC)
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 03 Jan 2014 10:58
Last Modified: 03 Jan 2014 10:58
URI: http://eprints.iisc.ac.in/id/eprint/48113

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