基于空时编码的格基规约算法在混合预编码中的应用

Application of Lattice Reduction Technology based on STBC Coding in Hybrid Precoding

在自适应混合预编码中,通过将格基规约算法与迫零预编码结合,构成格基规约(Lattice Reduction)破零预编码(Lattice Reduction-Zero Force,LR-ZF)算法,提高了信道正交性。将LR-ZF算法与模拟预编码组成混合预编码,将此方案和空时编码(Space Time Black Code,STBC)相结合运用在大规模MIMO系统中。仿真结果表明,此方案可以同时获得分集增益和编码增益,提高了系统性能,减小了系统复杂度,进一步降低了系统误码率。

In the system of adaptive hybrid precoding,Lattice Reduction-Zero Force(LR-ZF)is formed by combining the Lattice Reduction with Zero-Force(ZF)precoding,which improves the orthogonality of the channel.The proposed scheme combining with Space Time Black Code(STBC)is applied to the Massive MIMO system.Simulation results indicate that this scheme can obtain diversity gain and coding gain at the same time,improve system performance,reduce system complexity,and further reduce system error rate.