Joint delay and direction of arrivals estimation in mobile communications

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• 作者：Dominic Grenier ; Bahareh Elahian…
• 关键词：Joint TDOA ; DOA ; Channel estimation ; MUSIC algorithm ; MVDR algorithm ; Second order estimation
• 刊名：Signal, Image and Video Processing
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：10
• 期：1
• 页码：45-54
• 全文大小：708 KB
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• 作者单位：Dominic Grenier (1)
  Bahareh Elahian (1)
  Alexia Blanchard-Lapierre (1)
  
  1. Electrical and Computer Engineering Department, Laval University, Quebec City, G1V 0A6, Canada
  
• 刊物类别：Engineering
• 刊物主题：Signal,Image and Speech Processing
  Image Processing and Computer Vision
  Computer Imaging, Vision, Pattern Recognition and Graphics
  Multimedia Information Systems
  
• 出版者：Springer London
• ISSN：1863-1711

文摘

In this paper, we present a novel and precise way of estimating the direction and delay of arrivals in multipath environment for channel estimation purposes. Recently, super-resolution methods have been widely used for high-resolution direction of arrival (DOA) or time difference of arrival (TDOA) estimation. The proposed algorithm, called JDTDOA, is applicable to space–time channel estimation for space–time processing systems that employ hybrid DOA/TDOA technology. The estimator is based on conventional MUSIC algorithm to find the DOA and uses a standard correlator along with spline interpolation to find the TDOA of each arrival. In the interest of estimating the channel’s characteristics, each direction must be associated with its proper delay of arrival. To achieve this, we suggest a very simple and optimum beamforming by performing maximum variance distortionless response applied to each DOA found. The output at each DOA beamforming process gives the recovered signal from the relevant direction. A correlation is then made between each recovered signals which can be interpolated by cubic spline. The peak in correlation figure indicates the specific delay between the signal arrivals coming from the two considered direction. Keywords Joint TDOA-DOA Channel estimation MUSIC algorithm MVDR algorithm Second order estimation