基于欠采样的载频与二维到达角联合估计方法  

Joint carrier and 2D-DOA estimation based on sub-nyquist sampling

作　　者：张钧 姜思仪 彭喜元 Zhang Jun;Jiang Siyi;Peng Xiyuan(Beijing Institute of Remote Sensing Equipment,Beijing 100854,China;School of Electronics and Information Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]北京遥感设备研究所,北京100854 [2]哈尔滨工业大学电子与信息工程学院,哈尔滨150001

出　　处：《电子测量与仪器学报》2020年第4期142-149,共8页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金面上项目(61671177)资助。

摘　　要：针对阵列参数估计中传统奈奎斯特采样定理给采样和存储设备带来的巨大压力,提出了一种基于随机解调(RD)阵列结构的信号载频与二维到达角(2D-DOA)联合估计方法。利用不同天线阵列之间的互相关矩阵构造协方差矩阵,基于旋转不变子空间(ESPRIT)方法求解载频和2D-DOA参数,同时克服了载频和2D-DOA之间的配对问题。仿真实验结果证明了该方法能较好地从较少的欠奈奎斯特样本中估计目标信号的载波频率和2D-DOA,并恢复原信号的时域波形。The traditional Nyquist sampling theorem brings a pressure in the sampling and storage devices for array parameter estimation in radar signal.A joint carrier frequency and two-dimensional direction of arrival(2 D-DOA)estimation method are proposed based on double L shaped array random demodulation(RD)structure.This method based on the estimating signal parameter via rotational invariance technique(ESPRIT)decomposition method.The algorithm constructs a cross-correlation matrix between different antennas.The corresponding pairing method is also provided.Simulation results show that this method can estimate the carrier frequency and 2 D-DOA of the target signal from the sub-Nyquist samples,and reconstruct the time domain waveform of the original signal.

关 键 词：2D-DOA 联合估计 双L型阵列 随机解调 压缩感知 

分 类 号：TN820.5[电子电信—信息与通信工程]