An Indoor Positioning System Based on Multiple Existing Communication Networks
A communication network and indoor positioning technology, which is applied in the field of indoor positioning systems, can solve the problems of high cost, short distance, and low cost, and achieve the effects of accurate positioning data, reducing errors, and improving accuracy
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Embodiment 1
[0035] Such as figure 1As shown, an indoor positioning system based on multiple existing communication networks includes multiple AP2s, smart devices 1 to be positioned, a control chip 4 and a central processing unit 3, and multiple AP2s are wirelessly connected to the smart devices 1 through their respective communication networks, The central processing unit 3 is connected to the AP2 through an optical fiber, and the control chip 4 is connected to the central processing unit 3 . Wherein, the communication network includes GSM, WCDMA, LTE, CDMA and WIFI network. AP2 This is the network access point in the room itself, such as the access point of WIFI. The smart device 1 is a user's hand-held mobile device: such as a mobile phone, which is the device to be positioned by the system. The control core switches between different commercial networks, and can also choose to use different AP2s indoors. The central processing unit 3 can make different commercial communication netwo...
Embodiment 2
[0049] The difference between this embodiment and Embodiment 1 is that there is only one communication network between AP2 and smart device 1. At this time, although a single AP2 has only one communication network, there are actually many such AP2s under this indoor communication network. Processor 3 obtains the AOA data corresponding to AP2 under the communication network according to the signal received by AP2 under the same communication network and adopts the AOA estimation algorithm, and then combines the position information of AP2 with a geometric method to obtain the set of position information of the smart device 1 under the communication network , and compare the sets of location information of the smart device 1 under different communication networks to obtain the optimal location information of the smart device 1 .
[0050] Among them, the communication network is divided into high-frequency network and low-frequency network, because the diffraction ability of high-...
Embodiment 3
[0054]The difference between this embodiment and Embodiment 1 is that four AP2s are set indoors. The user's mobile phone can be used as a transmitting signal source, and the signal source transmits signals to four AP2s. The system starts to run under the action of the control chip 4 (the control code is written in the chip): for example, the system first automatically selects the WIFI frequency band with a frequency of 2.4GHz, and returns the signal received by AP2 to the central processing unit 3; then the system selects The GSM signal with a frequency of 450MHz is received in the same way. Then the central processing unit 3 starts to run, and the system uses a high-precision AOA estimation algorithm to start computing the data, and the system obtains four AOA estimation results through four signals received by AP2 under the WIFI signal; use the same method to obtain The results of four AOA estimations under GSM signal are presented. Comparing the AOA of different AP2s unde...
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