Noncoherent alamouti phase-shift keying with full-rate encoding and polynomial-complexity maximum-likelihood decodingNoncoherent alamouti phase-shift keying with full-rate encoding and polynomial-complexity maximum-likelihood decoding Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2018-11-262017enWe consider Alamouti encoding that draws symbols from phase-shift keying and develop a new differential modulation scheme that attains full rate for any constellation order. In contrast to past work, the proposed scheme guarantees that the encoded matrix maintains the characteristics of the initial codebook and, at the same time, attains full rate so that all possible sequences of space-time matrices become valid. Surprisingly, although the validity of all sequences could be thought as a drawback with respect to the cost of noncoherent sequence decoding, in fact it turns out to be an advantage. Based on recent results in the context of quadratic-form maximization over finite alphabets, we exploit the full-rate property of the proposed scheme to develop a polynomial-complexity maximum-likelihood noncoherent sequence decoder whose order is solely determined by the number of receive antennas. Numerical studies show the superiority of the proposed scheme in comparison with contemporary alternatives in terms of encoding rate, decoding complexity, bandwidth efficiency, and throughput.http://creativecommons.org/licenses/by/4.0/IEEE Transactions on Wireless Communications16106688-6697 Markopoulos, Panos Karystinos Georgios Καρυστινος Γεωργιος Institute of Electrical and Electronics Engineers Decoding complexity Differential decoding Full-rate encoding Phase-shift keying Space-time block codes Transmit diversity Unique decodability