Ultra wide band UWB positioning system and method based on multi-communication fusion

Abstract

The invention relates to the technical field of terminal positioning, in particular to an ultra wide band UWB positioning system and method based on multi-communication fusion, and the positioning system comprises a positioning layer which obtains positioning data through single-station AOA direction finding positioning; a network layer which comprises a base station for wireless networking and aserver connected with the base station; wherein the base station receives the positioning data of the positioning layer and transmits the positioning data to a server connected with the upper computerso as to realize terminal positioning monitoring. The invention is scientific and reasonable in design, the positioning layer achieves single-station distance measurement through UWB direction and distance measurement, the laying number of base stations is reduced under the same positioning coverage range, and therefore the cost of the whole system can be reduced; and meanwhile, the distance measurement frequency of the positioning tag can be reduced, so that the capacity of the system positioning tag can be increased, the power consumption of the positioning tag can be reduced under the samecapacity, the equipment installation and deployment difficulty and cost are reduced, and the practicability and popularization and application values are relatively high.

Description

technical field [0001] The invention relates to the technical field of terminal positioning, in particular to an ultra-wideband UWB positioning system and method based on multi-communication fusion. Background technique [0002] Ultra-wideband UWB positioning technology has the advantages of low system complexity, low power spectral density of transmitted signals, insensitivity to channel fading, low interception capability, and high positioning accuracy. However, the UWB positioning system faces the disadvantage of high cost, which is not conducive to large-scale promotion. In recent years, in order to reduce the laying cost of UWB systems, there are currently two main ways: some manufacturers increase the transmit power and receiving sensitivity of UWB hardware by adding external power amplifiers (PA) and low-noise amplifiers (LNA), so as to improve the performance of UWB. Communication distance and coverage, thereby reducing the number of UWB devices in the system, and fi...

AI Technical Summary

Problems solved by technology

However, there are still some problems in this method. First, the increase of transmission power is limited to a certain extent. It is applied on the ground. According to the regulations of the Ministry of Industry and Information Technology on the use of UWB technology frequencies, the transmission power of UWB is limited to <-41.3dBm / MHz. Underground Application, according to the requirements of the GB3836.1 standard, the radio frequency power should not exceed 6W (36dBm), so simply increasing the transmission has limited control over the cost of the UWB system; secondly, increasing the transmission power will inevitably lead to an increase in equipment power consumption, usually to reduce There are two methods for tag power consumption: a. Reduce the transmit / receive / duty cycle of the terminal, but increase the transmit / receive / duty cycle of the base station. This method actually transfers the power consumption of the terminal to the base station. In the scene of power supply, the battery life of the equipment is greatly limited; b. The time synchronization of the whole network is adopted, but the system stability and flexibility are poor

Images