Paper Info
Title
Fast Joint Estimation of Time of Arrival and Angle of Arrival in Complex Multipath Environment Using OFDM.
Abstract
Joint time of arrival (TOA) and angle of arrival (AOA) estimation based on a uniform circle array (UCA) involves problems, including high computational complexity in the multi-dimensional spectral search method and lack of applicability in coherent multipath environments. In this paper, we introduce a fast estimation algorithm based on the orthogonal frequency-division multiplexing system that uses space-frequency characteristics to reconstruct the virtual array and extend the array aperture. First, we combine the array structure with the signal frequency features to construct the extended virtual array. We then calculate the channel frequency response covariance matrix via frequency-domain smoothing preprocessing and determine a closed-form solution of AOA using UCA estimating signal parameters via rotational invariance techniques. Finally, using the estimated angle values, we perform a 1-D spectral search to determine the TOA values. The simulation results indicate that the proposed method provides an accurate estimation under the low signal-to-noise ratio conditions in coherent, independent, or mixed multipath environments, and provides a better performance than the multi-dimensional spectral peak search method, in terms of both computational complexity and estimation accuracy.
Year
DOI
Venue
2018
10.1109/ACCESS.2018.2875824
IEEE ACCESS
Keywords
Field
DocType
Time-of-arrival,angle-of-arrival,space-frequency characteristics,channel frequency response
Multipath propagation,Array data structure,Frequency response,Computer science,Algorithm,Angle of arrival,Smoothing,Covariance matrix,Orthogonal frequency-division multiplexing,Time of arrival,Distributed computing
Journal
Volume
ISSN
Citations 
6
2169-3536
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Haiyun Xu113015.77
Yankui Zhang204.06
Bin Ba321.40
Daming Wang448.88
Xiangzhi Li500.34