Abstract
The observed values of time of arrival (TOA) for the radio signals between the target and the wireless communication base stations are mainly affected by signal non-line-of-sight (NLOS) propagation in target location. TOA with NLOS makes a lot of signal noises and propagation delays, that is, location errors. For the first time, this paper focuses on the problem of modifying the Z-axis location coordinates in three-dimensional (3D) target location. A novel algorithm is proposed by establishing the modified least squares 3D location model for the accurate target location. Meanwhile, an optimal base station selection strategy is proposed by using the spectral clustering algorithm, which is based on the spatial distribution of the base stations. Compared with the existing algorithms, the proposed algorithm in this paper has better performance on the accurate target 3D location in real scenes, which has a high value of practical application. The simulations illustrate that the location error of the proposed algorithm is smaller than those of other existing algorithms based on the same simulation data and conditions.
Highlights
E difficulties of target location lie in how to get accurate 3D location of the target in unstable and unreliable external network environment and how to improve the robustness of locating. ere are many reasons for 3D localization errors of the target [1,2,3,4,5,6,7,8]
(ii) An innovative approach is established to the modified least squares of target 3D location model for the Z-axis coordinate and the minimum wireless communication base station selection algorithm
According to classical target location algorithms, the existing target location works can be classified into locating based on ultra-wideband radios [2, 3] and wireless signal communications [4, 5] in the present stages. e wireless communication 3D location technology achieves great progress and has been used in many application fields
Summary
E difficulties of target location lie in how to get accurate 3D location of the target in unstable and unreliable external network environment and how to improve the robustness of locating. ere are many reasons for 3D localization errors of the target [1,2,3,4,5,6,7,8]. In the multipath propagation of signals, the same signal received by the base station may have time and space delay, which reduces the accuracy of the 3D. E number of base stations is a relatively important factor which will lead to localization error. E location of base station is an important factor which affects the localization accuracy of the target. E reasonable setting of base station location can reduce the localization errors caused by NLOS. Erefore, it is very important to establish a dynamic system for localization algorithm, so that we can effectively achieve intelligent location of the target. (ii) An innovative approach is established to the modified least squares of target 3D location model for the Z-axis coordinate and the minimum wireless communication base station selection algorithm.
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