Received signal with 1 path i-th ray 欧 ()白 x:=(0R.0R) 三 囟 RX Complex number representing the received signal(current) BelYR)gnl0z-0k R=-j π功 )-e时=pe (of course it is a funcion of the current I at the transmitter end) In particular we have: P amplitude Si,ti lenth,delay 8 phase % dicertion of arrival Doppler freq. 4 dicertion of departure Received signal with 1 path IR i = − jλ ℜe Y( R ) gR θ R i ,φ R i ( ) πη pˆR θ R i ,φ R i ( )⋅  ET i { } = IR i e jarg IR i ( ) = ρi e jϑi RX i-th ray χi = θ R i ,φ R i ( ) ≡ In particular we have: ρi amplitude θi phase fi Doppler freq. si , ti lenth, delay χi dicertion of arrival ψi dicertion of departure Complex number representing the received signal (current) : (of course it is a funcion of the current IT at the transmitter end) i ET  ( ) i i R T I E  YR YL