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为了评价现有MIMO空间通信预编码方案并改进,分析与仿真了基于迫零和最小均方误差准则的联合LLL格约简非线性TH预编码算法.在TH预编码基础上,通过改善信道矩阵奇异性,提出了改进的格约简TH预编码方法.仿真表明,采用最小均方准则的预编码MIMO系统性能优于采用迫零准则的系统;所提格约简TH预编码算法相对现有的TH编码算法,在采用LLL格约简而使复杂度下降时,仍可获得相对较好的误码性能,适合多天线MIMO空间传输预编码等应用.
In order to evaluate the existing MIMO space communication pre-coding scheme and improve it, the joint LLL lattice non-linear TH pre-coding algorithm based on zero-forcing and minimum mean square error criterion is analyzed and simulated.On the basis of TH pre-coding, Singularity, the improved GTS-TH pre-coding method is proposed.The simulation shows that the performance of the precoding MIMO system using the least mean square criterion is better than the system using the zero-forcing criterion; The TH coding algorithm can still obtain relatively good error performance when the complexity is reduced by adopting LLL lattice reduction and is suitable for applications such as multi-antenna MIMO spatial transmission precoding.