RSSI-based positioning method for wireless sensor network

A technology of a wireless sensor network and a positioning method, which is applied in the field of positioning based on RSSI in a wireless sensor network, and can solve problems such as not considering multipath interference, being affected by multipath, and having no authorization, etc., and achieving elimination of off-chip multipath interference impact, reduce the impact of on-chip multipath interference, and achieve simple effects

CN101945474AActive Publication Date: 2011-01-12SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-01-12

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Abstract

The invention relates to an RSSI-based positioning method for a wireless sensor network, which comprises the following steps of: firstly, receiving a radio-frequency signal sent in a radio-frequency mode by a transmitting node through a receiving node in the wireless sensor network, then, demodulating and filtering the received radio-frequency signal subjected to multi-path fading to acquire a corresponding base band signal through the receiving node, over-sampling each code chip in the base band signal, performing related despreading on a first sampling point of each code chip to acquire bitinformation which is not subjected to multi-path interference in the chip, and finally, calculating the RSSI value according to the acquired bit information to determine the distance between the receiving node and the transmitting node so as to realize positioning. Therefore, the method is simple and easy to implement, and can reduce the influence of the multi-path interference on positioning.
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Description

technical field

[0001] The invention relates to the field of wireless sensor network positioning, in particular to an RSSI-based positioning method in a wireless sensor network. Background technique

[0002] Wireless Sensor Network (WSN) is an "intelligent" network composed of miniature sensor nodes with wireless communication, perception and computing capabilities. It is used in various fields such as military, agriculture, environmental testing, medical and health, industry, intelligent transportation, etc. In wireless sensor network applications, the location information of nodes is very important. In most applications, the data sensed without knowing the sensor location is meaningless. At present, the sensor network positioning application mainly faces two main problems: one is the positioning accuracy, and the other is the positioning cost. The distance measurement based on RSSI (received signal strength indicator) has been widely used in the positioning of wireless s...

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] The present invention provides an RSSI-based positioning method in a wireless sensor network. A specific embodiment of the present invention in wireless sensor network applications will be described in detail below with reference to related drawings.

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