收发信机射频损伤的UDN协同波束形成

为了进一步提高超密集无线网络（UDN）性能，提出一种同时考虑收发信机射频损伤的协同波束形成方法.首先，建立了包含射频损伤的UDN协同波束形成模型，并利用凸优化方法求解得到其最优解；然后，针对此最优解的结构特征，结合其在实际系统中难以实现的局限，设计了由信号泄漏噪声比波束形成导向矢量和最优功率分配构成的线性次优波束形成器.仿真结果表明，收发信机射频损伤的协同波束形成器能有效降低干扰，并且可提高UDN的系统容量.

UDN Coordination Beamforming with Transceiver Radio Frequency Impairments

The coordination beamforming scheme with transceiver radio frequency impairments was pro-posed to improve the performance of ultra-dense wireless network ( UDN ) . Firstly, the coordination beamforming model based on the residual radio frequency impairments is presented, and the convex opti-mization algorithm is utilized to achieve the optimal solution. Then, considering the limitations of the im-plementation of the optimal beamformer, the signal leakage noise ratio based the linear suboptimal beam-former is designed by beamforming steering vector and optimal power allocation. Simulations show that the proposed suboptimal beamformer with radio frequency impairments can effectively reduce interference and improve the sum rate of UDN.