Target location and clock parameter joint estimation method in asynchronous wireless network
A wireless network and joint estimation technology, applied in the field of target positioning, can solve problems such as low complexity and poor positioning performance
Active Publication Date: 2018-03-06
NINGBO UNIV
View PDF7 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although this method has a closed-form solution with low complexity, the localization performance of this method will deteriorate in a noisy environment
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0034] A method for joint estimation of target position and clock parameters in an asynchronous wireless network proposed by the present invention, the flow chart of which is as follows figure 2 As shown, it includes the following steps:
[0035] ① Establish a two-dimensional coordinate system or a three-dimensional coordinate system as a reference coordinate system in the asynchronous wireless network environment, and set an unknown target source and N sensors with known positions in the asynchronous wireless network environment, and the unknown target The coordinate of the source in the reference coordinate system is x, and the coordinates of N sensors in the reference coordinate system correspond to s 1 ,s 2 ,...,s N , wherein, N≥k+1, k represents the dimension of the reference coordinate system, k=2 or k=3, that is, when the reference ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a target location and clock parameter joint estimation method in an asynchronous wireless network. According to time stamps of sending measurement signals to each other betweena target source and a sensor, an original model is obtained; the original model is simplified and after processing, only a clock drift of the target source is unknown; an estimation value of the clock drift is obtained based on a linear weighted least square estimation method; a weighted least square problem related to the location of the target source and the clock drift is obtained based on thesimplified model, relaxation is carried out to obtain a second-order cone programming problem being a convex problem, and calculation is carried out by using an interior point method to obtain preliminary estimation values of the location and the clock drift; and then a regularization term is added into the weighted least square problem, relaxation is carried out to obtain a second-order cone programming problem, and calculation is carried out by using the interior point method to obtain final estimation values of the location and the clock drift. The target location and clock parameter jointestimation method has the following advantage: the positioning precision is high even in a high-noise environment.
Description
technical field [0001] The invention relates to a target positioning method, in particular to a joint estimation method of target position and clock parameters in a non-synchronous wireless network. Background technique [0002] With the rapid development of micro-electro-mechanical systems (MEMS), it has become possible to produce a large number of low-cost, low-power, multi-energy miniature sensors, thus promoting the modern large-scale wireless sensor networks (Wireless SensorNetworks, WSNs ) construction. Because of its wide application in environmental monitoring, natural disaster prediction, health care, manufacturing and transportation, wireless sensor networks have received more and more attention. [0003] As a new information acquisition and processing technology, wireless sensor network has broad application prospects in target tracking, intrusion monitoring and some positioning related fields. However, whether it is in military reconnaissance or geographical en...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01S5/02
Inventor 王刚张帆王伟
Owner NINGBO UNIV