What does three base station positioning mean? What is the positioning principle of GSM base station

UWB (ultra-wideband) is a radio technology, which is widely used in indoor high-precision positioning due to its high positioning accuracy, strong anti-interference ability, good penetration ability and other technical characteristics. The conventional UWB positioning algorithm includes: TOF (Time of Flight), TDOA (Time Difference of Arrival), and AOA (Angle of Arrival), among which the TOF TDOA algorithm route needs at least three units (triangulation principle) to achieve positioning, and the AOA algorithm route can achieve positioning with one base station.

Beijing Quanji Technology Co., Ltd. is a leading comprehensive service provider of UWB positioning in China. Quanji Technology is an innovative pioneer in UWB (ultra-wideband) high-precision indoor positioning technology, creating a new category of global UWB-AOA single base station positioning, reducing the cost by an order of magnitude. Product coverage....

A geographic and spatial positioning system and method comprising: a first base station (a), a second base station (b) and a third base station (c), which have a fixed position relative to the earth and are separated from each other but do not form a straight line; the space platform(s) that can be seen from the fixed base station (a, b, c); At least one target (p) located on or above the Earth's surface; the transmitter (1), which is effectively connected with each part determined by the fixed base station (a, b, c) and the space platform (s) for the purpose of emitting pulses of a defined frequency, each pulse at a predetermined reference time; the receiver (2), which is effectively connected with each fixed base station (a, b, c), each target (p) and the transmitter (1) for receiving the pulse at a trajectory of the distance between the fixed base station (a, b, c) connected with the receiver (2) along the covered space platform (s); the control unit (3), which is effectively connected to the transmitter (1) and receiver (2), in order to calculate the tetrahedral side edges at the moment of each pulse emission, the vertices of the tetrahedron are determined by three fixed base stations (a, b, c) and the space platform (s), wherein based on the determination of the propagation time of each pulse on the trajectory along the space platform (s) and each fixed base station (a, b, c), in order to determine the extension of the respective space platform (s) trajectory, and the fixed base station (a, b, c) The space platform (s) can be seen and, at the same time, the equations of motion of it are determined, which makes it possible to calculate the possible position of the target (p) in the control unit (3) and in the target (p) itself.

The general principle of base station positioning.

1. Measure the downlink pilot signal of different base stations, and obtain the TOA (time of arrival) or TDOA (time difference of arrival) or TDOA (time difference of arrival) of the downlink pilot of different base stations.

The actual location estimation algorithm needs to consider the situation of multiple base stations (3 or more) positioning, so the algorithm is much more complex. Generally speaking, the more base stations measured by the mobile station, the higher the measurement accuracy and the more obvious the improvement in positioning performance.

Mobile phone positioning refers to the technology or service that obtains the location information (latitude and longitude coordinates) of the mobile phone or end user through specific positioning technology, and marks the location of the located object on the electronic map.

2. There are two kinds of positioning technology, one is GPS-based positioning, and the other is based on the positioning of base stations of mobile operation networks. The GPS-based positioning method uses the GPS positioning module on the mobile phone to send its own location signal to the positioning background to realize the positioning of the mobile phone. Base station positioning is to use the distance of the base station to the mobile phone to determine the location of the mobile phone.

The latter does not require the mobile phone to have GPS positioning capabilities, but the accuracy depends largely on the distribution of the base station and the size of the coverage area, and sometimes the error will exceed one kilometer. The former has higher positioning accuracy. In addition, there are ways to use WiFi to locate in a small area.

Base station positioning, also known as mobile phone base station location service or mobile location service. The technology obtains the location information of mobile terminal users through the network of telecom mobile operators, and provides users with location information services with the support of the electronic map platform.

Satellite positioning system is the global positioning system, the technology uses satellites for accurate positioning, which can ensure that at any time, combined with the data of 4 satellites to achieve navigation, positioning, timing and other functions.

The difference between the two is that the positioning accuracy of the satellite positioning system is high, and the error is within 10 meters, while the positioning accuracy of the base station is low, and the error is generally more than 100 meters.

GPS positioning accuracy is high, base station positioning is inaccurate, it is recommended to recommend GPS positioning, otherwise it is easy to be complained.

Now the business is getting harder and harder, hehe. It's going to be monitored.

The location of the base station is fixed, and the signal strength is different in different places, which can be determined according to the cell occupied by the mobile phone and the signal strength of the community, and the error in the general urban area (such as the fifth ring road in Beijing) is within 300 meters.

Upstairs is the right solution. But in addition to TOA, there are more AFLTs.