摘要
为提高宽带信源的定位精度,在已知信源个数情况下,提出一种新的基于任意阵列的宽带信源定位方法。首先,针对宽带信号的非平稳特性,可将宽带信号利用短时傅里叶变换在频域表示,利用群延迟函数(Group Delay)实现宽带信号的高精度波达方向(DOA)估计;最后根据质心收缩算法和互功率谱相位法以收缩区域的方式进行信源定位。对提出的算法进行了仿真分析,仿真结果表明本文算法DOA估计精度较高,且误差较小,信源定位精度较高。相对于现有的定位方法,本文算法计算量小,精度更高,更具实用性。
In order to enhance the resolution of wideband source localization when the number of source is known,a new wideband source localization method is proposed.First,aimed at the feature of wideband sources which were non-stationary,the wideband signal can transform into frequency domain by short-time Fourier transform（ SFT）.Then realize precise DOA estimation by using group delay function.Final,source localization realize by centroid contract and cross power spectrum method in the form of contract region.In this paper,the proposed method are analysis in simulation.The simulation results show that the proposed method has high DOA estimation precision and error is low.The resolution on source location is high too.The proposed method has small cal-culation and more practical.
出处
《电子技术应用》
北大核心
2016年第1期82-86,90,共6页
Application of Electronic Technique
基金
国家自然科学基金(61461012)
广西无线宽带通信与信号处理重点实验室主任基金(GXKL0614106)
桂林电子科技大学硕士研究生创新项目(GDYCSZ201455)
