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Interference Suppression Using Generalized Inverse Precoder for Downlink Heterogeneous Networks

机译:下行异构网络中使用广义逆预编码器的干扰抑制

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This letter proposes an optimal precoder design using a generalized inverse structure for downlink crosstier interference suppression between macro base station (MBS) and femtocell access point (FAP) transmission in heterogeneous networks. Using Tikhonov regularization, we derive a closed form relationship between given MBS transmit power or interference constraints and the regularization parameter. Determining a Pareto optimal regularization parameter requires extensive computation. As an alternative, we propose an algorithm to find a suitable regularization parameter to achieve fairness in the system, i.e., equal FAP and MBS user rates. Simulation results show that the proposed precoder greatly improves FAP user rates at the expense of a small yet tolerable decrease in average MBS user rate.
机译:这封信提出了一种使用广义逆结构的最佳预编码器设计,用于异构网络中宏基站(MBS)与毫微微小区接入点(FAP)传输之间的下行链路跨层干扰抑制。使用Tikhonov正则化,我们得出给定MBS发射功率或干扰约束与正则化参数之间的闭合形式关系。确定帕累托最优正则化参数需要大量的计算。作为替代,我们提出一种算法,以找到合适的正则化参数以在系统中实现公平性,即相等的FAP和MBS用户速率。仿真结果表明,所提出的预编码器大大提高了FAP用户速率,但代价是平均MBS用户速率的下降幅度很小但可以容忍。

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