Anchor node layout and ranging positioning method based on detection signal wavelength information

Abstract

The invention discloses an anchor node layout method based on detection signal wavelength information. The anchor node layout method is characterized by comprising the following steps of arranging a signal transmitter / receiver in a space to be detected, calculating the wavelength of a transmitting signal with a coiling phase transmitted by the transmitter / receiver, establishing a group of ascending series containing a positive rational number of times of the wavelength, taking the signal transmitter / receiver as the center of a circle, establishing concentric spheres from the near to the distant by taking the series as semi-diameters respectively, forming a group of concentric circular arcs after the intersection of the positioning horizontal plane of the space to be detected and the concentric spheres, and arranging an arbitrary number of anchor nodes on each circular arc. The layout method can reduce the mutual influence among the anchor nodes under the precondition of guaranteeing the positioning precision, the negative impact of too high density of original anchor node layout on the positioning precision is overcome, the positioning precision of nodes at the position of detected edge can also be improved, and better ranging precision can be obtained in synergy ranging based on phase information by utilizing the layout.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor network node positioning, in particular the problem of positioning under complex channel environment. Background technique [0002] With the continuous advancement of wireless sensor network technology, the service based on node location has attracted more and more attention, and the accurate acquisition of location information has become a key link in the development of next-generation technology. Currently existing positioning technologies include GPS, Bluetooth, ultrasonic, ultra-wideband, Wi-Fi, computer vision, ultra-high frequency radio frequency identification (UHF RFID) and other technologies. Among them, GPS has become the most widely used outdoor positioning technology, and UHF RFID, with its advantages of non-contact, high efficiency, low power consumption and low cost, has become a hot spot and difficulty in indoor positioning research in recent years. [0003] Currently avail...

AI Technical Summary

Problems solved by technology

However, due to the mutual influence between the anchor nodes, the positioning accuracy will be reduced when the density is too high, so there is a limitation in improving the positioning accuracy by increasing the deployment density of the anchor nodes.

Compared with energy information, existing studies have shown that even in a complex channel environment, the phase information of narrowband signals can still be obtained relatively accurately, but there is a periodic ambiguity problem (or called the convolution phase problem), which makes the positioning based on phase information Technology suffers from large ranging errors

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