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Spectrally Efficient Alamouti Code Structure in Asynchronous Cooperative Systems
IEEE Signal Processing Letters
A relay communication system with two amplify and forward (AF) relays under flat fading channel conditions is considered where the signals received from the relays are not necessarily time aligned. We propose a new time-reversal (TR)-based scheme providing an Alamouti code structure which needs a smaller overhead in transmitting every pair of data blocks in comparison with the existing schemes and, as a result, increases the transmission rate significantly (as much as 20%) in exchange for adoi:10.1109/lsp.2014.2308296 fatcat:matemc6iwnddjjqym6ca6lhdcm