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• W1998515042 abstract "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 fulldiversity. 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 (Nt complex symbols per channel use) full-diversity FT-optimal schemes are constructed for all Nt > 1. These are the first full-rate full-diversity FFSs reported in the literature for T <; Nt. Simulation results show that the new schemes have the best error performance among all known FFSs." @default.
• W1998515042 created "2016-06-24" @default.
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• W1998515042 date "2013-10-01" @default.
• W1998515042 modified "2023-10-02" @default.
• W1998515042 title "Full-Rate Full-Diversity Finite Feedback Space-Time Schemes with Minimum Feedback and Transmission Duration" @default.
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• W1998515042 doi "https://doi.org/10.1109/twc.2013.090513.122003" @default.
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