Hey everyone, thanks for coming back to Wi Fi fundamentals with location and analytics. This course will help you to muster the air. In our previous video we saw how we use circles to find the exact location of our station. Let's see how it works. geometry is our best friend when it comes to finding precise location of our station. To understand it better, let's assume that when we first measured the distance from our access point to our station, it was seven meters away.

We actually narrow down our search for this station B to being one of the points on a circle center that a with a radius of seven meters. Still, it is far from being a precise description. of its location. If we include another fixed distance from access point see, for our example, its distance is five meter from station B, we now have a second circle. The inclusion of the second circle narrows B location to two points where the two circles intersect. Things are getting much better with two points.

But if we want to pinpoint the location of station B, we can now use a third circle and the third distance to eliminate one of these two possibilities. The place where all three circles intersect is the position of station B. This magic happens thanks to trilateration The process of trilateration finds the location of a point that is described in terms of fixed distances to three known points. trilateration is used also in Wi Fi round trip time of flight. Next up analytics. See you soon