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Noncoherent Orthogonal Distributed Space-Time Block Codes for Amplify-and-Forward Half-Duplex Cooperative Relay Channels

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2 Author(s)
Shuang Ma ; Sch. of Inf. Sci. & Eng., Univ. of Jinan, Jinan, China ; Jian-Kang Zhang

In this paper, the design of a simple orthogonal distributed space-time block code for a noncoherent amplify-and-forward (AF) half-duplex cooperative relay system is proposed by utilizing a pair of coprime phase-shift keying (PSK) constellations and the Alamouti coding scheme. It is shown that one significant advantage of such design is that, in a noise-free case, for any given nonzero received signals, the channel coefficients and the transmitted signals can be blindly and uniquely determined with a simple closed-form solution. The other significant advantage is that, in a noise case, the least square error (LSE) receiver also has a simple closed-form solution to jointly estimate the channel and the transmitted signals. Simulation results show that our proposed scheme obtains a significant gain of signal-to-noise ratio over the training scheme.

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Vehicular Technology, IEEE Transactions on  (Volume:61 ,  Issue: 6 )