Paper Info
Title
Direct Position Determination of Non-Circular Sources Based on a Doppler-Extended Aperture With a Moving Coprime Array.
Abstract
Direct position determination (DPD) is a new promising technique in wireless location. Compared with conventional two-step localization methods, DPD achieves a higher accuracy by directly estimating the source location without computing the intermediate parameters. However, all the existing angle-based DPD algorithms for non-circular sources use uniform linear arrays, which lead to low degrees of freedom and poor estimation precision, and do not make use of the Doppler characteristics of the moving station. To improve the DPD performance, this paper proposes a novel DPD algorithm for non-circular sources based on a Doppler-extended aperture with a moving coprime array. First, the coprime array is introduced to angle-based DPD, and an extended array model is established by exploiting the Doppler characteristics of the moving array. The characteristics of non-circular sources are used to further improve the positioning accuracy. Finally, merging the subspace data for each measuring position, the target positions can be obtained. The Cramer-Rao lower bound of the DPD algorithm is presented for non-circular sources in a coprime array combined with Doppler-extended aperture. Performance analysis and the simulation experiments show that compared with the conventional two-step localization method and DPD based on a uniform array, including subspace data fusion and weighted subspace fitting algorithms, the proposed algorithm effectively improves the location accuracy at the expense of a slight complexity increase and can determine the location of multiple targets in underdetermined conditions.
Year
DOI
Venue
2018
10.1109/ACCESS.2018.2875822
IEEE ACCESS
Keywords
Field
DocType
Direct position determination (DPD),coprime array,non-circular source,Doppler shift,Cramer Rao lower bound (CRLB)
Aperture,Wireless,Subspace topology,Underdetermined system,Computer science,Upper and lower bounds,Algorithm,Sensor fusion,Doppler effect,Coprime integers,Distributed computing
Journal
Volume
ISSN
Citations 
6
2169-3536
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Yankui Zhang104.06
Haiyun Xu213015.77
Bin Ba302.70
Daming Wang448.88
Wei Geng500.34