基于FSTD的5G下行控制信道改进方案

With the development of the fifth generation (5G)communicationresearch and due to the increase of the number of antennas, conventionalfrequency switch transmit diversity orthogonal frequency division multiplexing (FSTD-OFDM) cannot be flexiblyused in5G new radiointerface, raising the problem of low antenna utilization. To this end, in order to address the above issues, a novel transmission schemeareproposed in this paper.Specifically, the transmittedsymbols locating on different frequency bands are multiplied with correspondingprecoding vectorsto maximize frequency diversityin the proposed scheme.Finally, simulation results show that the proposed scheme not only improves the antennautilizationefficiently, but alsosignificantlyreduces the error rate.