基于TD-SCDMA无线定位虚拟线阵四阶累量修正MUSIC算法的研究

无线定位的圆-角定位技术中,DOA估计极其重要。本文针对基于TD-SCDMA智能天线预处理后的虚拟均匀线阵MUSIC算法带来的阵列孔径小,抗阵元误差扰动性差的不足,研究了基于模式空间虚拟均匀线阵四阶累量的MUSIC算法,由于虚拟线阵四阶累量MUSIC算法的应用范围局限于独立的信号源的DOA估计,不能用于相关信号源DOA估计,因而提出了基于模式空间虚拟均匀线阵四阶累量的修正MUSIC(FOC-MMUSIC)算法,有效地拓展了阵元孔径,改善了系统抗阵元误差扰动和算法对相关信号源DOA的估计性能。

Research on 4-order cumulant MUSIC Modified MUSIC Algorithm of Virtual Uniform Linear Array for Wireless Location Based on TD-SCDMA

DOA estimation is very important in the circle-angle location based on smart antenna of TD-SCDMA.In the paper,In consideration of the small array aperture and poor robustness of the disturbed array errors for MUSIC algorithm based on the virtual uni- form linear array in mode space,the 4-order cumulant MUSIC(FOC-MUSIC)algorithm based on the virtual uniform linear array in mode space are researched.,Considering that the 4-order cumulant MUSIC(FOC-MUSIC)algorithm for virtual uniform linear arrays in mode space can not be used to estimate DOA for correlated signals,then the 4-order cumulant modified MUSIC(FOC-MMUSIC)algo- rithm based on virtual uniform linear arrays in mode space is proposed.,the problem for DOA estmation of correlated signals has been resolved,and the performance of DOA estimation is impoved.