> (three 'transmitter' routers and three 'receiver' routers). Three Tx antennas and three Rx antennas. You need 3 of them to make a 3d point, otherwise you wo

> (three 'transmitter' routers and three 'receiver' routers). Three Tx antennas and three Rx antennas. You need 3 of them to make a 3d point, otherwise you would have 2d/1d only. Even 1cm difference between antennas placement is more than enough. > It seems that the person needs to be between the transmitter and receiver You receive the direct signal earlier than the reflected one. If you find a way to capture both/only reflections then you can do it without LoS and consequently from only one device (though you would still need at least 3 Tx/Rx pairs.)