This page describes the basic principles and functionality of the TDoA modes in the Loco Positioning System.

TDoA means Time Difference of Arrival and is based on the idea of measuring the difference in distance to two anchors as opposed to Two Way Ranging that measures the distance from the Tag to the Anchor. Since time in this context is related to propagation of radio waves, time can be converted to distance using the speed of light. For instance, if the Tag is located somewhere 2 meters away from Anchor 0 and 3 meters from Anchor 1, the TDoA value (converted to distance) would be 1 meter. Note that in the TDoA modes we do not have access to the distances (3 and 2 meters in this example), only the difference.

TODO