A positioning method and positioning system based on antenna direction correction of a signal transmitting device

Abstract

The invention puts forward a positioning method and a positioning system based on signal emitting device antenna direction correction. The positioning method comprises the following steps: S1, processing a signal emitted by a signal emitting device to a to-be-positioned point into basic positioning information; S2, calculating out the preliminary positioning location of the to-be-positioned point using a signal attenuation calculation model and a positioning algorithm based on a propagation model; S3, acquiring the attenuation characteristic of the signal emitting device through measurement, wherein the attenuation characteristic includes a plurality of pieces of constant-amplitude attenuation information, and each piece of constant-amplitude attenuation information records the propagation characteristic relation between angle and distance under the same attenuation signal intensity; and S4, correcting the preliminary positioning location according to the attenuation characteristic to realize accurate positioning. According to the invention, the directivity of a signal source propagation antenna is taken into full consideration, and the existing positioning result is corrected using a measured antenna radiation signal attenuation model instead of an ideal attenuation model, which greatly improves the positioning accuracy. The positioning method and the positioning system are especially suitable for indoor Wi-Fi positioning, and have a broad market application prospect.

Description

technical field [0001] The invention relates to the field of positioning technology, in particular to a positioning method based on antenna direction correction of a signal transmitting device, and is especially suitable for indoor Wifi positioning technology. Background technique [0002] With the continuous development of communication technology, people's demand for location is getting higher and higher. Indoor positioning technology can provide users with accurate shopping mall positioning, navigation, and shopping guide services, and provide shopping malls with passenger flow lines and customer shopping orientation. Indoor location service market The scale is huge. At present, due to its wide application, low construction cost, and high positioning accuracy, Wifi-based indoor positioning solutions are relatively popular. [0003] The current indoor Wifi positioning is mainly based on the positioning technology of RSSI value (received signal strength indication, used to...

AI Technical Summary

Problems solved by technology

The positioning method based on location fingerprints is complex in layout and requires a large number of data collection of RSSI values ​​at different locations, which cannot be widely applied; the positioning method based on the propagation model is to receive the RSSI of the signal point radiation signal by monitoring the measurement point (point to be positioned) value, combined with the indoor signal attenuation model, to obtain the distance between the measurement point and the signal point, and finally calculate the actual coordinates of the measurement point by obtaining the distance from the measurement point to multiple known signal points to achieve positioning, but the existing This propagation model-based positioning technology assumes that the propagation antenna of the signal point is an ideal antenna with the same signal attenuation model in all directions, and calculates and determines the positioning position based on the signal attenuation model of this ideal antenna, but in fact the ideal antenna The antenna does not exist, and even the omnidirectional antenna in the prior art has different signal attenuation models in all directions, which leads to the low positioning accuracy of the existing positioning technology based on the propagation model

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