The swell of novelties exhibited at the Xiaomi conference in Shenzhen, have been analyzed and presented gradually, however, there are still some small details pending of that event. One of the most innovative features of the Xiaomi Mi 8 is its dual band GPS. This is the first smartphone in the world that uses this type of GPS capable of providing a super precise positioning. So they have decided to try it, and the GPS of the Xiaomi Mi 8 showed surprising results.
Details of the dual channel system
In an open environment, a GPS deviation comes mainly from a delay in the signal through the ionosphere. Xiaomi Mi 8 uses dual channel positioning L1 + L5 dual frequency, which can effectively correct the delay of the ionosphere. The error of the band L1 is 300 meters in theory, while that of the band L5 is 30 meters. L5 is 10 times more accurate than L1, since it effectively resolves reflection interference from urban buildings.
The test of fire, the Mi 8 GPS is victorious
At the press conference, Lei Jun said that Xiaomi Mi 8 took the lead in adopting dual frequency GPS technology, which actually improved positioning accuracy by at least 3-5 times. To show the ultra-precision GPS dual-frequency of the Xiaomi Mi 8, Xiaomi performed an extreme test with this phone, the test consisted of a car with all the windows completely opaque, a narrow lane was created and a driver had to drive the car down the lane towards a parking lot. The driver had no view, since all the windows were obscured and had to rely strictly on the GPS integrated by the Xiaomi Mi 8.
Since the lane is completely invisible to the driver, it requires that the positioning accuracy of the Mi 8 navigation be extremely high without any deviation for the driver to be successful. In the end, with the dual frequency GPS positioning of the Xiaomi Mi 8, the test car successfully passed the test thanks to an excellent alignment between the streets, and the vehicle overcoming the obstacles. Next, we can see some images of the test.
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Source: (Gizchina)
