Network Distributed Positioning Method Based on Rotatable Transmission Beam Signal

Abstract

The invention provides a network distributed type positioning method based on rotatable transmitted beam signals. A directed transmission beam is formed by an antenna array configured by reference nodes in a positioning network, and the transmission beam signals are rotated by periodically changing an array element weight, and distance information needed by positioning is obtained from the changing rule, so that geographic position estimation of the distance information can be obtained; due to the design of the rotating beam signals, although the complexity of the reference nodes is increased, the structural design greatly simplifies hardware complexity of the mass nodes in a distribution type system. Nodes to be positioned can carry out signal detection only by utilizing conventional wireless communication equipment and utilizing an RSSI hardware circuit of a radio frequency chip; extra detection equipment is not needed; the method is high in positioning precision, simple and high in cost performance.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to a wireless sensor network based on rotatable transmitting beam signals. Background technique [0002] Wireless sensor network has a very broad application prospect because of its simplicity, reliability and high cost performance. Wireless sensor node location is one of the important aspects of wireless sensor network applications, sensor network monitoring messages without location information are often meaningless. [0003] The existing wireless sensor network positioning systems can be roughly divided into two categories. The first type of positioning system is a specially developed system and its supporting structure, which is mainly used for positioning and tracking; the second type of positioning system uses the existing wireless network structure or It is used for the positioning of mobile nodes after minimal modification of the existing network structure....

AI Technical Summary

Problems solved by technology

However, this type of algorithm requires very high sensitivity to Doppler frequency detection. When the antenna rotation radius, occurrence frequency and rotation speed are not high, the multi-Doppler frequency shift it produces is very limited, which increases the number of joints to be located. The difficulty of detection will eventually lead to large positioning errors

At the same time, because the anchor node uses a mechanical rotation design device, the complexity of the design of the anchor node system is increased, and the stability and reliability of the system are also reduced.

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