一种基于SLNR预编码的天线与用户联合选择算法

Joint antennas and users selection with SLNR precoding

针对在多用户MIMO系统中天线与用户联合选择算法复杂度高的问题,依据SLNR预编码算法特点,提出了一种基于SLNR预编码的天线与用户联合选择算法。分析了天线与用户选择顺序对基于SLNR预编码算法的多用户MIMO系统性能影响,给出了先天线后用户的次最优选择策略。所提算法首先为每个用户选取最优的单天线,再利用贪婪思想进行用户选择。仿真结果表明,所提算法与穷举算法相比和容量性能在0～20 dB的信噪比范围内损失均保持在1.6 dB左右;而误比特性能与穷举法相比在10-3有2 dB左右损失,但是所提算法复杂度与穷举法相比下降明显。

Aiming at solving the problems of algorithm complexity was high with the joint antennas and users selection in multi user MIMO system,according to the characteristic of SLNR precoding algorithm,this paper proposed a SLNR precoding based joint antennas and users selection algorithm.By analyzing the influence of the order in antenna and user selection to the performance of SLNR precoding algorithm,gave the selection policy first antenna then user.The proposed algorithm firstly provided the best single antenna for each user,secondly selected users by using greedy policy.The simulation result shows that the loose of total capacity is about 1.6 dB in the SNR range of 0 to 20 dB,compare with the force searching algorithm,while the BER has a loose of 2 dB at 10-3.But the complexity of this algorithm is obviously decreased.