Ultra-wideband positioning method of single receiver in indirect path environment

Abstract

The invention discloses an ultra-wideband positioning method of a single receiver in an indirect path environment. The method includes the steps that first, initialization is conducted; next, ultra-wideband signals are sent by a fixed base station, and a non-directional antenna of a mobile base station receives the signals from the fixed base station and detects transmission time delay, the arrival azimuth angle and the pitch angle; then, a directional antenna of the mobile base station adjusts the self transmitting angle according to the previous arrival azimuth angle and the previous pitch angle and reflects the ultra-wideband signals; the fixed base station receives the signals from the mobile base station and detects the arrival azimuth angle and the pitch angle, and then measurement of five parameters of a first reflection channel is completed; then, five parameters of a second reflection channel are detected; whether the two sets of parameters meet requirements or not is checked with an auto-diagnosis algorithm, and the coordinates of the mobile base station are calculated through a positioning algorithm. The ultra-wideband positioning method effectively solves the problem that because direct signals cannot be detected, positioning is inaccurate, and improves the indoor ultra-wideband positioning accuracy, and the indoor positioning technology has very high promotional value.

Description

technical field [0001] The invention relates to a wireless communication technology, in particular to a wireless positioning technology, in particular to an ultra-wideband positioning method for a single receiver in an indoor non-direct path environment. Background technique [0002] At present, people pay more and more attention to positioning technology. The most widely known outdoor positioning technology is GPS technology, that is, Global Positioning System (Global Positioning System). Interference and indoor occlusion, the positioning accuracy of GPS and other satellite positioning systems are significantly reduced, and GPS is currently not suitable for indoor positioning applications. [0003] Based on the needs of indoor positioning, commonly used indoor positioning technologies mainly include Bluetooth positioning, infrared positioning, ultrasonic positioning and RFID positioning. Among them, the Bluetooth positioning technology is a wireless transmission technology...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the current indoor positioning technology, because the environment is relatively complex, it is easy to be blocked by obstacles between the mobile base station and the fixed base station, especially the interference of metal obstacles, so that the signal strength of the ultra-wideband is seriously attenuated, causing the fixed base station The sensor cannot receive the ultra-wideband direct channel from the mobile base station, which affects the accuracy of the ultra-wideband positioning system. Invented a single-receiver ultra-wideband positioning method in a non-direct path environment

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