On the last day of May, Xiaomi released the Xiaomi 8 mobile phone. Unlike usual, Xiaomi’s conference was more about emphasizing practicality and user experience. So the 'black technology' that was unveiled was all for the average user, letting everyone Users can experience cutting-edge technology, dual-frequency GPS is a good example.
Xiaomi 8 is the world's first mobile phone equipped with dual-band GPS technology, which can achieve ultra-precise positioning. Dual-frequency GPS can improve positioning accuracy by 3 to 5 times compared with traditional single-frequency GPS mobile phones. In the official evaluation of Xiaomi mobile phone, the staff selected Four high-frequency scenes that need to use positioning services are measured, including cell phone calls, micro-channel sharing, walking navigation, driving navigation, and adding two single-frequency GPS flagships as a comparison. Xiaomi 8 performed extremely well in each item. .
Although Lei Jun repeatedly emphasized the advantages of dual-frequency GPS's 'fast positioning' and 'small error' at the press conference, users still doubted its accuracy. Recently, the Chinese peacekeeping force renamed the Xiaomi 8 dual-frequency GPS function. Weibo@China Peacekeeping Police made a comment on Xiaomi 8, indicating that Xiaomi 8 is a mobile phone that can be used in the global peacekeeping mission area for overseas peacekeeping police. The most powerful is its dual-frequency GPS function. Very accurate, compared to the traditional single-frequency GPS mobile phone, and even a number of GPS locators, the accuracy is much higher. After seeing the comments of the Chinese peacekeeping force, the skeptical users finally put down the tangled heart and ready to snap up Xiaomi 8 .
It is reported that the dual-frequency GPS technology uses the 1571.42MHz L1 band and the 1157.45MHz L5 band for dual-frequency positioning. Because the ionosphere has different effects on the L1, L5 two-band signals, it can be independent of other factors, by comparing the two channels. Signal delay, using the calculation to eliminate the errors caused by the ionosphere. Therefore, for all software that requires the use of positioning services, such as maps, cars and other APP, dual-frequency GPS can effectively avoid the problem of inaccurate positioning.
