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To achieve the available performance gains in half-duplex wireless relay networks, several cooperative schemes have been earlier proposed using either distributed space-time coding or distributed beamforming for the transmitter without and with Channel State Information (CSI), respectively. However, these schemes typically have rather high implementation and/or decoding complexities, especially when the number of relays is high. In this paper, the authors propose a simple low-rate feedback-based approach to achieve maximum diversity with a low decoding and implementation complexity.
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