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Novel full-diversity high-rate STBC for 2 and 4 transmit antennas
IEEE Communications Letters
We design a new rate-5 4 full-diversity orthogonal space-time block code (STBC) for QPSK and 2 transmit antennas (TX) by enlarging the signalling set from the set of quaternions used in the Alamouti  code. Selective power scaling of information symbols is used to guarantee full-diversity while maximizing the coding gain (CG) and minimizing the transmitted signal peak-to-minimum power ratio (PMPR). The optimum power scaling factor is derived analytically and shown to outperform schemes baseddoi:10.1109/lcomm.2006.1603374 fatcat:vp2guq3wjrfdpg5e73ebttthqm