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Method and device for selecting sensor of wireless sensor network based on TDOA (time difference of arrival) positioning under non-line-of-sight condition

A wireless sensor network and sensor technology, applied in the field of sensor management, can solve problems such as poor positioning and tracking geometric figures, and achieve the effect of improving positioning accuracy

Inactive Publication Date: 2021-06-22
浙江毅星科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In the positioning scenario based on time difference of arrival (TDOA), common sensing and reference sensors have a significant impact on positioning performance, especially fixed reference sensors may determine poor positioning and tracking geometry. Therefore, the existing A sensor selection algorithm for a single vector of

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  • Method and device for selecting sensor of wireless sensor network based on TDOA (time difference of arrival) positioning under non-line-of-sight condition
  • Method and device for selecting sensor of wireless sensor network based on TDOA (time difference of arrival) positioning under non-line-of-sight condition
  • Method and device for selecting sensor of wireless sensor network based on TDOA (time difference of arrival) positioning under non-line-of-sight condition

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Embodiment Construction

[0078] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0079] S101: Acquiring candidate reference sensors and other common sensors based on the Ferch information of the Cramereau boundary in non-line-of-sight conditions with unknown parameter vectors.

[0080] In the wireless sensor network, a space Cartesian coordinate system is established in advance, and the position of a radiation source emitting a measurement signal needs to be determined based on TDOA (TIme difference of Arrival, time difference of arrival); the sensor network consists of S space-separated sensors, the set as The position coordinates of the sensor are s i =(x i ,y i ,z i )T, i=1,...,S; wher...

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Abstract

The invention discloses a method and a device for selecting a wireless sensor under a non-line-of-sight condition based on TDOA (Time Difference of Arrival) positioning. The method comprises the steps: selecting two independent Boolean vectors, and determining a reference sensor and other sensors at the same time; and a Cramer-Rao bound (CRLB) of TDOA positioning under a non-line-of-sight (NLOS) condition with an unknown prior statistical probability and a non-line-of-sight (NLOS) condition with a known prior statistical probability is provided respectively. After two independent Boolean vectors are selected, an analysis reference algorithm based on a convex relaxation technology is provided for selection of a wireless sensor, so that the Cramer-Rao bound (CRLB) is minimum; and a best choice fill (BOF) algorithm and an iterative exchange greedy (ISG) algorithm are combined. Compared with an existing sensor selection method, positioning errors and algorithm complexity are reduced.

Description

technical field [0001] The invention relates to the technical field of sensor management, and more specifically relates to a method and device for selecting a sensor in a wireless sensor network based on TDOA positioning under non-line-of-sight conditions. Background technique [0002] Radiation source location has been widely used in radar, sonar, navigation, wireless communication, indoor service, vehicle communication, and spectrum monitoring. Among them, in wireless sensor networks, the selection of sensors is a basic practical problem. To determine the location of the radiation source prior to sensor selection, it is common to measure the time difference of arrival (TDOA) from the radiation source to the spatially separated sensor. Sensors are used in time-difference-of-arrival (TDOA) positioning applications and, in harsh conditions, are powered by batteries. However, a sensor network powered by a battery reduces the probability of sensors handling other tasks, which ...

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Application Information

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IPC IPC(8): G06F17/11H04W84/18
CPCG06F17/11H04W84/18
Inventor 张磊
Owner 浙江毅星科技有限公司
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