Iterative method for optimizing positions of indoor target and a scatterer

A target position and scatterer technology, applied in the iterative field of indoor target and scatterer position optimization, can solve problems such as difficulty in meeting the performance requirements of a single AP positioning system

Inactive Publication Date: 2020-01-07
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] Aiming at the problem that the existing indoor positioning technology has been difficult to meet many performance requiremen

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  • Iterative method for optimizing positions of indoor target and a scatterer
  • Iterative method for optimizing positions of indoor target and a scatterer
  • Iterative method for optimizing positions of indoor target and a scatterer

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[0090] specific implementation plan

[0091] The present invention will be further described below in conjunction with accompanying drawing:

[0092] like figure 1 As shown, an iterative method for indoor target and scatterer position optimization, the method includes the following steps:

[0093] Step 1. In an indoor multipath environment, construct an indoor multipath signal propagation model according to the signal propagation characteristics, such as figure 2 shown. In this model, m (m≥3, m is an integer) scatterers containing position errors are deployed, expressed as The i-th scatterer is denoted as (i≤m, i is an integer), its coordinates are marked as Single AP coordinates are marked as s 1 =(x 1 ,y 1 ,z 1 ), and the coordinates of the target position are marked as u=(x, y, z).

[0094] Step 2. Based on the initial position of the scatterer in step 1 (i≤m, i is an integer), use the particle swarm optimization algorithm in the swarm intelligence optimizat...

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Abstract

The invention discloses an iterative method for optimizing positions of an indoor target and a scatterer. The method comprises the following steps: constructing a multipath signal propagation model ofan indoor scatterer and a single AP according to multipath signal propagation characteristics; constructing a differential delta top equation of a target position relative to each scatterer by utilizing a position relationship between a multipath signal parameter differential delta top and the single AP, the target and each scatterer and converting a performance optimization problem of a positioning system into a weighted least square solving problem; and then carrying out iteratin based on a WLS algorithm to solve the differential delta top equation so as to obtain final estimated positionsof the scatterer and the target. According to the invention, an indoor target and scatterer position optimization iteration method based on a WLS algorithm is put forward; and with the disclosed method, a problem that the positioning precision is low in a multipath environment is solved; and the robustness of the positioning system is enhanced while the equipment deployment cost is lowered.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to an iterative method for optimizing the positions of indoor targets and scatterers. Background technique [0002] Under the comprehensive evolution of factors such as technological development, demand changes, and industrial integration, and with the collision of multiple industries such as wireless communication, Internet of Things, and artificial intelligence, outdoor positioning technology can no longer meet people's needs for location information. The development of indoor positioning technology is gradually showing the development trend of the integration of multiple positioning technologies and the integration of indoor and outdoor positioning technologies. The indoor positioning industry chain expands and extends from a single line to a network structure, and then develops to an indoor positioning system with higher positioning accuracy. At present, in the field...

Claims

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Application Information

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IPC IPC(8): G01S5/02G01C21/20
CPCG01S5/0273G01C21/206
Inventor 田增山王亚李泽
Owner CHONGQING UNIV OF POSTS & TELECOMM
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