模数混合阵下的鲁棒MVDR波束形成器  

Robust MVDR beam-former under hybrid analog-digital array

作　　者：易笃裕 杨峰[1] 丁良辉[1] YI Du-yu;YANG Feng;DING Liang-hui(School of Electronic Information and Electrical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《信息技术》2021年第6期1-6,共6页Information Technology

基　　金：国家自然科学基金(61771309,61671301)。

摘　　要：随着毫米波及大规模天线阵列技术在5G中使用,波束赋形算法复杂度、射频端器件数量都随之飙升,导致实际应用成本过高,模数混合天线阵列是降低大规模天线阵列硬件复杂度的一种解决方案。但常用的波束赋形算法无法直接应用于模数混合天线阵列结构,故文中提出了一种模数混合天线阵下的鲁棒MVDR波束形成器,可以很好地对抗实际场景下各类加性误差所造成的算法性能退化。通过仿真试验,文中提出的模数混合天线阵下的鲁棒MVDR波束形成器性能不劣于纯数字天线阵列下的鲁棒MVDR波束形成器,且在高信噪比条件下,输出SINR较纯数字天线阵列下的鲁棒MVDR波束形成器高约1dB。With the use of millimeter-wave and large-scale antenna arrays technology in 5G,the complexity of beam-forming algorithms and the number of radio-frequency head components have soared,resulting in excessively high actual application costs.The hybrid analog-digital antenna array is a solution to reduce complexity of large-scale antennas.However,the commonly used beam-forming-algorithms cannot be directly applied to the structure of the hybrid analog-digital antenna array.Therefore,this paper proposes a robust MVDR beam-former under the hybrid analog-digital antenna array,which can well combat algorithm performance degradation caused by various additive errors in actual scenarios.After the simulation,the performance of the robust MVDR beam-former under the hybrid analog-digital antenna array is not inferior to the robust MVDR beam-former under the full digital antenna array when SNR is low,and the performance of output SINR is about 1dB higher when SNR is 20dB.

关 键 词：信号处理 模数混合阵 波束赋形 凸优化 

分 类 号：TN911.7[电子电信—通信与信息系统]