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针对K用户多输入多输出干扰信道系统提出了一种基于功率分配预编码优化算法.首先通过信道的奇异值分解,基于矩阵弦距离,选出一组与最好的特征子信道最为匹配的预编码矩阵来传输信号,然后根据信道矩阵信息的强弱进行功率分配,从而对预编码矩阵进行优化,可最大化保证接收信号的强度.仿真结果表明,该算法未用迭代计算预编码矩阵和接收抑制矩阵,不仅使整个系统的复杂度大大降低,而且在系统和速率有微小损失的情况下,提高了系统的误码率性能.
Aiming at the multi-input multi-output interference channel system for K users, a pre-coding optimization algorithm based on power allocation is proposed.Firstly, based on the singular value decomposition of the channel and based on the matrix chord distance, a set of pre-coding optimal subchannels Coding matrix to transmit signals and then distribute the power according to the strength of the channel matrix information to optimize the precoding matrix to maximize the strength of the received signal.The simulation results show that the algorithm does not iteratively calculate the precoding matrix and receive Suppression matrix not only greatly reduces the complexity of the entire system, but also improves the BER performance of the system with slight loss of system and rate.