基于毫米波阵列天线的低复杂度DOA估计方法  

Low Complexity DOA Estimation Method based on Millimeter-Wave Linear Array

作　　者：张振权[1] 谢威 沈哲贤 陈丽花 ZHANG Zhen-quan;XIE Wei;SHEN Zhe-xian;CHEN Li-hua(Unit 69046 of PLA,Urumchi Xinjiang 830001,China;Institute of Communications Engineering,Army Engineering University of PLA,Nanjing Jiangsu 210001,China)

机构地区：[1]69046部队,新疆乌鲁木齐830001 [2]解放军陆军工程大学,江苏南京210001

出　　处：《通信技术》2019年第6期1342-1347,共6页Communications Technology

基　　金：国家自然科学基金项目(No.61671472);江苏省自然科学基金项目(No.BK20181335)~~

摘　　要：针对5G毫米波通信场景,提出一种基于均匀线性阵列(ULA)的低复杂度信号到达角(DOA)估计方法。首先通过信道最小二乘(LS)预估计和离散傅里叶变换(DFT)获取波束域信道矢量,计算低精度的来波DOA。其次通过局部过采样实现波束对准,提高DOA估计精度。相较于传统的定位方法,如MUSIC、ESPRIT算法,该方法计算复杂度低且估计精度高,能够在数字域通过快速傅里叶变换(FFT)实现,因而更加适用于5G毫米波大规模多输入多输出(MIMO)通信场景。A low complexity DOA(direction of arrival)estimation method based on ULA(uniform linear array)is proposed for 5G millimeter wave communication scenarios.Firstly,by LS(least square)channelestimation and DFT(Discrete Fourier Transform),the beam-domain channel vector is acquired,and then is used to get the rough DOA.Then,the local over-sampling is used to realize the beams alignment,thus to improve the estimation accuracy.Compared with the traditional positioning method,such as MUSIC and ESPRIT,the proposed method has fairly low computational complexity and high estimation accuracy,and can be implemented in the digital domain by FFT(Fast Fourier Transform).Therefore the proposed method is quite applicable to 5G millimeter wave massive MIMO scenario.

关 键 词：到达角估计 天线阵列 均匀线性阵列 

分 类 号：TN929.5[电子电信—通信与信息系统]