Intelligent terminal indoor positioning method and system based on WIFI double-frequency fusion

Abstract

The invention relates to an intelligent terminal indoor positioning method based on WIFI dual-frequency fusion, and the method comprises the steps: selecting an indoor reference point, and collecting the position coordinates of the reference point and a WiFi dual-frequency signal of the reference point based on a dual-frequency WIFI transmitter; extracting a dual-frequency CSI fingerprint feature of the reference point based on the WiFi dual-frequency signal of the reference point; associating the dual-frequency CSI fingerprint features with the position coordinates of the reference points; wherein the dual-frequency CSI fingerprint features of all the reference points form a dual-frequency fingerprint feature library; constructing a deep neural network, and training the deep neural network by using the dual-frequency CSI fingerprint features in the dual-frequency fingerprint feature library; and acquiring a WiFi dual-frequency signal of the position of the intelligent terminal, processing the WiFi dual-frequency signal to obtain a dual-frequency CSI fingerprint feature of the position of the intelligent terminal, inputting the dual-frequency CSI fingerprint feature into the trained deep neural network, and outputting a positioning result of the position of the intelligent terminal by the deep neural network.

Description

technical field [0001] The present invention relates to the technical field of intelligent terminals, and more specifically, to an indoor positioning method and system for intelligent terminals based on WIFI dual-frequency fusion. Background technique [0002] With the rapid development and popularization of smart terminals, there is a huge demand for terminal-based location services. Nowadays, GNSS-based smart terminal positioning has developed maturely in outdoor scenarios, but it is difficult for smart terminals to receive GNSS signals indoors because GNSS is difficult to reach, which affects the realization of positioning. Therefore, in the field of indoor positioning, the technology of using radio frequency signals such as WIFI, Bluetooth, and UWB, and using many data sources such as visible light signals and sound signals for indoor positioning research has been developed. [0003] At present, the cost and power consumption of mainstream ultra-wideband positioning sol...

AI Technical Summary

Problems solved by technology

[0003] At present, the cost and power consumption of mainstream ultra-wideband positioning solutions are too high, and the support of smart terminals and other terminals is limited, so it is difficult to realize popular application in smart terminals. Smart terminals, such as smart phones, generally support the reception of Bluetooth signals and WIFI signals. Positioning with WIFI technology or Bluetooth technology is possible

Indoor positioning based on Bluetooth technology is low in cost but limited in operating distance, and the 2.4GHz frequency band where it is located has serious interference, making it difficult to apply to typical indoor scenarios with complex electromagnetic environments such as smart offices and smart supermarkets.

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