Quasi orthogonal group SFTBC transmit scheme with linear constellation precoding

Based on LCP(Linear Constellation Precoding),a novel multi-antenna transmit scheme is proposed to make the quasi orthogonal group SFTBC obtain full frequency diversity.In the scheme,LCP and quasi orthogonal group SFTBC are cascaded,thus making SFTBC based on quasi-orthogonal design obtain full frequency diversity and space diversity.Both theoretical analysis of pair-wise error probability and BER simulation results are given.Simulation results show that the proposed scheme has a performance gain of at least 1dB compared to traditional ones.