Abstract
Device-free localization (DFL) is a promising technique which could provide localization information for a target without requiring an electronic device. With the development of the smart city and smart transportation, DFL could form part of a basic technique that could be used to track and localize roadside vehicles. In this paper, some algorithms for three-dimensional (3D) DFL for vehicle surveillance are developed, including statistical methods for data, a method for communication link selection, a novel method of communication link weight allocation and some other minor approaches to obtain the location and approximate size of a static vehicle, as a basic technique of moving vehicle detection. Then, an experimental system is designed. Through security monitoring wireless sensor networks (WSN), real-time vehicle characteristics (i.e., location and size) are calculated automatically and intuitively displayed through a heat map. Experiments are performed to validate the effect of the proposal and the accuracy of the localization and size estimation.
Highlights
In recent years, the number of vehicles has increased rapidly, and traffic is universal in cities.it is necessary to promote the development of the smart city and smart transportation to alleviate the traffic problem
Device-free localization (DFL) is an advanced technique that can realize positioning and tracking for a target only by analyzing the received signal strength (RSS) variance of wireless communication links introduced by the obstruction of the target, without the need for a device being equipped
We propose the use of information entropy (IE) to evaluate the contribution of the obscured links; according to the contribution to the vehicle localization, different weights are assigned to each obscured link
Summary
The number of vehicles has increased rapidly, and traffic is universal in cities.it is necessary to promote the development of the smart city and smart transportation to alleviate the traffic problem. The number of vehicles has increased rapidly, and traffic is universal in cities. Device-free localization (DFL) is an advanced technique that can realize positioning and tracking for a target only by analyzing the received signal strength (RSS) variance of wireless communication links introduced by the obstruction of the target, without the need for a device being equipped. It performs based on wireless sensor networks (WSN) formed by several wireless sensors. Kassem and Jie proposed two different methods to realize monitoring and speed estimation for a vehicle, respectively [9,10]
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