With the continuous advancement of wireless technology, people's demand for positioning technology is also increasing. Whether indoors or outdoors, there are applications that require precise positioning. Although traditional positioning technology has made great progress, there are still problems such as low accuracy and susceptibility to interference in some specific scenarios. With the development of ultra-wideband (UWB) technology, UWB positioning technology is becoming an effective solution to solve these problems.
Ultra-wideband technology is a technology that transmits data by sending radio waves with extremely short pulses. Compared to traditional narrowband signals, UWB signals have a very large bandwidth, often in the frequency range of more than 500MHz. This enables UWB technology to achieve extremely high positioning accuracy and immunity to interference.
UWB module triangulation with TDoA and PDoA
To understand how UWB triangulation works, first understand what TDoA positioning and PDoA positioning are.
TDoA: The TDoA positioning principle determines the position of a tag by measuring the time difference between the arrival of a signal at different receivers. When a signal arrives at different receivers, there are small differences in its arrival time, and these differences can be used to calculate the position of the label.
PDoA: The PDoA positioning principle determines the position of the tag by measuring the phase difference between the arrival of the signal at different receivers. Phase difference refers to the time difference between the peaks or troughs of a signal, and these phase differences can be used to calculate the position of the label.
In UWB module triangulation, "triangulation" usually refers to the positioning of three UWB modules as base stations, this method is called triangulation, because it usually involves the use of three anchor points (or UWB modules) to determine the position of the label.
Specifically, each UWB module will receive a signal from the tag and determine the distance to the tag based on the time of arrival (TDoA) or phase difference (PDoA) of the signal. This distance information will be used to determine the location of the tag. The three anchor points can form a triangle, and by measuring the distance of the label to each anchor point, you can calculate the position within the triangle where the label might be located. However, in some cases, more UWB modules can also be used for positioning. At this point, the positioning area will no longer be a simple triangle, but a more complex polygon. However, the basic positioning principle is still the same, which is to determine the distance between the tag and the individual anchor points by measuring the arrival time or phase difference, and then using the geometric relationship of the polygon to determine the tag position.
Advantages of UWB3000F27 module triangulation:
Positioning accuracy: Due to the high bandwidth characteristics of UWB technology, the positioning accuracy is accurate to 10cm
Support two-way ranging: TDoA and PDoA positioning schemes
Data Rate: The data rate supports 850kbps and 6.8Mbps
Long transmission distance: under low-speed movement, the transmission distance can reach 1.5 kilometers
Low power consumption and low interference: The narrow pulse signals sent by UWB have a low energy density, so they usually do not interfere with other communication systems.
UWB module triangulation technology is becoming one of the hot technologies in the field of positioning technology due to its extremely high positioning accuracy, strong anti-interference ability and wide range of application scenarios. With the continuous development of technology and the continuous expansion of application scenarios, I believe that UWB module triangulation technology will bring more convenience and surprises to our lives.