Line-of-sight propagation

Line-of-sight propagation is a way of sending signals from one place to another. It involves sending signals in a straight line like a laser beam from one point to another. If there is something in the way of the line (like a wall or a tree) then the signal might not be able to get from one point to the other. To make sure the signal can get through, it is important to make sure there isn't anything blocking the line all the way from one point to the other.