The Xiaomi Mi 8 aims to be one of the most innovative smartphones, not only for Xiaomi, who used to be among the last to adopt the latest processors and technologies, but for the market in general. Xiaomi has put all the meat in the grill with the smartphone celebrating its eighth anniversary and that is why we will have such innovative features as a Dual GPS . But what exactly does this consist of?
Well, our partner Jorge already gave us a small preview of this feature , although here we will try to delve a little deeper into this interesting function of the Xiaomi Mi 8.
As you know, the main advantage of a dual GPS is its accuracy. We already tell you that the Xiaomi boasts this innovative feature thanks to an additional chip not included in the SoC and that is manufactured by Broadcom.
We know that the Broadcom BCM47755 is able to offer a accuracy of up to 30 centimeters compared to 5 meters of the usual GPS, but the truth is that Xiaomi has not explained anything about it.
To understand a little why this precision we should know that all GNSS satellite ( global satellite navigation system ) transmit a signal called L1 which includes the position of that satellite, the time and an identifier of it.
For its part, the most modern satellites also send a more complex signal called L5 in which additional information of said satellite is included. Our civilian GPS are prepared to work with the L1 signal from the satellites, and use it to fix their position on the globe based on the time the signal takes to go from the satellite to the receiver.
The Broadcom chip BCM47755 included in the Xiaomi Mi 8 would first use the L1 signal from the satellites, and then analyze the L5 signal from it to refine the first estimated position of the smartphone.
Without wishing to get too scientific, the L5 signal is less prone to what are known as distortions of multipath reflections that the signal L1, which is basically a loss of the signal accuracy that occurs when this signal bounces on other objects such as buildings in cities, causing the GPS receiver to receive different signals that complicate a specific position .
The fact that the dual GPS of the Xiaomi Mi 8 uses this system is very innovative because until now the only systems that used the L5 signal were military or industrial type , so that this technology finally opens up to the civil sphere.
If you are wondering why this technology has been implemented now and not before, we can tell you that, according to Manuel del Castillo , associate director of GNSS product marketing at Broadcomm, so far there were not enough satellites that they would use the L5 signal to make the system viable.
Currently there are in orbit some 30 satellites of type L5 , and that is why the Xiaomi Mi 8 can take advantage of this type of technology.
As we have already told you, it will lead to an increase in accuracy, especially in interiors, where the Broadcom BCM47755 It is capable of operating even several floors underground.
Another advantage of the dual GPS of the Xiaomi Mi 8 is its consumption , since GPS is usually one of the systems that most devour our smartphone’s battery, and in this case it would be up to 50% lower , which is more than remarkable, since it will considerably improve the autonomy of the Xiaomi Mi 8.
The chip is compatible with the original GPS as well as with the other global satellite navigation systems such as the Galileo European, the QZSS from Japan and the GLONASS from Russia, allowing the user of the Xiaomi Mi 8 to specify its position with a minimum of three satellites throughout the world.
There is less to know the Xiaomi Mi 8 (its two variants, in fact) in detail. Warm up engines that are around the corner on Thursday.