Author: bellasales

The Beidou system integrates Beidou short message communication with the characteristics of mixed constellations and system advantages to achieve integrated communication and navigation. The Beidou system exclusively achieves short message function and communication integration through active positioning RDSS. The Beidou short message SMS service is divided into SMS services provided to users in the Asia… Continue reading Comprehensive understanding of Beidou short message communication

Beidou-3 is the world's first satellite navigation system to provide tri frequency signal services. The use of dual frequency signals in satellite navigation systems can reduce the impact of ionospheric delay, while the use of tri frequency signals can construct more complex models to eliminate high-order errors in ionospheric delay and improve the efficiency of… Continue reading How does a tri band signal service satellite navigation system compare to dual band GPS

When the Bluetooth function in the mobile device is turned on, it will receive signal data sent by the iBeacon base station. After receiving the signal, the device estimates the distance between itself and the iBeacon base station based on the Received Signal Strength Indication (RSSI). Through the cross coverage and distance calculation of multiple… Continue reading IBeacon passive positioning technology principle, precise indoor positioning and navigation

　　The Beidou system consists of three parts: space segment, ground segment, and user segment. The space segment consists of a constellation of satellites with different orbital planes, including 3 GEO satellites, 3 IGSO satellites, and 24 MEO satellites. The ground segment includes several ground stations such as the main control station, time synchronization/injection station, monitoring… Continue reading The composition characteristics and advantages of the Beidou system

The VDB03S Bluetooth beacon is carefully developed by Shenzhen Weineng Information Technology Co., Ltd. It is an excellent Bluetooth personnel positioning tag that supports iBeacon Bluetooth broadcast protocol and is the core component for building Bluetooth positioning systems and achieving personnel positioning. This wristband has a wide range of functions. It is equipped with buttons… Continue reading 【 VDB03S 】 Personnel positioning SOS alarm 4.2 Bluetooth wristband

In response to the need for high-precision positioning in positioning scenarios, and to overcome the adverse effects of indoor environment on positioning accuracy, this project proposes a weighted correction positioning algorithm combining trilateral measurement positioning. The positioning system first uses the trilateral measurement positioning algorithm to estimate the initial position of the user, and then combines the position estimation obtained from the initial positioning with the user's position