Sezginer, SerdarSari, HikmetBiglieri, EzioUniversitat Pompeu Fabra2013-02-272013-02-272009Sezginer S, Sari H, Biglieri E. On high-rate full-diversity 2 x 2 space-time codes with low-complexity optimum detection. IEEE Trans. Commun. 2009; 57(5): 1532-1541. DOI 10.1109/TCOMM.2009.05.0706430090-6778http://hdl.handle.net/10230/20433The 2×2 MIMO profiles included in Mobile WiMAX specifications are Alamouti’s space-time code (STC) fortransmit diversity and spatial multiplexing (SM). The former has/nfull diversity and the latter has full rate, but neither of them has/nboth of these desired features. An alternative 2×2 STC, which is both full rate and full diversity, is the Golden code. It is the best known 2×2 STC, but it has a high decoding complexity. Recently, the attention was turned to the decoder complexity, this issue was/nincluded in the STC design criteria, and different STCs were/nproposed. In this paper, we first present a full-rate full-diversity/n2×2 STC design leading to substantially lower complexity of/nthe optimum detector compared to the Golden code with only a slight performance loss. We provide the general optimized form of this STC and show that this scheme achieves the diversitymultiplexing frontier for square QAM signal constellations. Then, we present a variant of the proposed STC, which provides a further decrease in the detection complexity with a rate reduction of 25% and show that this provides an interesting trade-off between the Alamouti scheme and SM.application/pdfeng© 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works./nThe final published article can be found at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4939247Comunicació sense fil, Sistemes deSistemes MIMOinfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/TCOMM.2009.05.070643ML detectionMultiple-input multiple-output (MIMO)Space-time codes (STCs)info:eu-repo/semantics/openAccess