source:truck tracking webfleet solutions release time:2024-03-04 Hits: Popular:realtime gps tracker online
In daily life, electronic products that can be seen everywhere generally involve the concept of positioning. There are various types of positioning, and commonly used ones include GPS positioning, base station (LBS) positioning, Beidou positioning, and WIFI positioning. What are the characteristics of these positioning methods and what are the differences between them? Below, the editor will introduce some basic knowledge of these positioning methods to you.
1. GPS positioning
GPS is a well-known term and a positioning method developed by the United States. The principle is that the receiver receives satellite broadcasts and obtains its own position information by analyzing the position, distance, and other information of visible satellites, as well as corresponding algorithms. The error is within a range of 15 meters, and the current number of visible satellites will affect positioning accuracy. The more visible satellites there are, the higher the accuracy,
Advantages: High positioning accuracy, as long as the positioning signals from four satellites can be received, positioning with an error of less than 15 meters can be carried out.
Disadvantage: It is severely affected by external factors, and when encountering bad weather, indoor shopping malls and building signal blind spots cannot be located.
2. LBS (base station) positioning
Base stations include mobile base stations, China Unicom base stations, and telecommunications base stations. The location information of the operator's cellular base station is fixed. By receiving one or more base station signal terminals, the operator calculates its own position based on signal strength and base station position. The positioning accuracy depends on the coverage density of nearby base stations. If there are many base stations, the positioning is accurate. If there are few base stations in mountainous areas, the positioning is not so accurate, and the positioning accuracy is generally between 50-2000 meters.
Advantages: Simple positioning and fast speed. Because it receives base station signals through a SIM card for positioning. In theory, as long as the signal difference between the three base stations is calculated, the location of the mobile phone can be determined. And unlike GPS positioning, it is not affected by weather, tall buildings, location, and so on.
Disadvantage: The error is too large. The position coordinate value obtained by calculating the difference in base station signals is clearly inferior to the positioning accuracy of GPS. There are few or even no base stations in suburban and rural areas. It can lead to inability to locate, which can be said to be unsuitable for outdoor use.
3. Beidou positioning
The independently developed satellites in our country, in layman's terms, are domestically produced GPS. The positioning principle is similar to GPS, which also uses Beidou satellites for positioning. Currently, there is no popularization in the civilian sector.
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