在LTE-A系统中,现有协作多点多用户预编码算法不能同时抑制用户间、用户内部及噪声干扰,并且计算复杂度较高.针对这两方面的问题,提出了一种改进的线性预编码算法.本文采用计算复杂度,系统容量和误码率作为评价算法性能的指标,建立了协作多点多用户的系统模型,并给出了改进算法具体的实施步骤,理论分析了算法的计算复杂度,使用MATLAB仿真验证了系统性能.仿真结果表明,该算法在一定程度上能够降低计算复杂度和误码率,且在相同的天线配置下,该算法的系统容量性能略低于正则块对角化预编码算法.%In Long Term Evolution-Advanced (LTE-A) system, existing coordinated multi-point (CoMP) multiuser precoding algorithm can not suppress multi-user,intra-user and noise interference at the same time and its computational complexity is high. To solve these two problems, an improved linear precoding algorithm is proposed. Computational complexity, system capacity and bit error rate (BER) as the indicators were used to evaluate the algorithm performance. We established coordinated multi-point multi-user system model, gave the improved algorithm specific implementation steps,theoretically analyzed computational complexity of the algorithm, and used MATLAB to simulate system performance. Simulation results show that the proposed algorithm can reduce computational complexity and bit error rate to some extent, and the system capacity performance of the proposed algorithm is slightly inferior to that of regularized block diagonalization algorithm.
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