Joint design of space-time mapping and half-sized linear constellation precoding for FDFR STBC with low PAPR and decoding complexity

Proposed is a joint design of space-time (ST) mapping and half-sized linear constellation precoding (LCP) to provide lower peak-to-average power ratio (PAPR) along with lower decoding complexity while maintaining full-diversity full-rate (FDFR), maximum coding gain, and product distance distribution at the level of conventional STBC with full-sized LCP. The proposed quasi-orthogonal ST mapping with half-sized LCP (Q-HLCP) is shown to have a PAPR advantage so that the Q-HLCP for a nonlinear amplifier with a 3 dB input back-off shows, at most, a 0.5 dB loss compared to the cases involving an ideal amplifier, while the conventional FDFR STBCs employing LCP suffer error floors.