Compatible Port Connections
Note carefully that to connect a wave digital element to port of the adaptor, we route the signal coming out of the element to become on the adaptor port, and the signal coming out of port of the adaptor goes into the element as . Such a connection is said to be a compatible port connection. In other words, the connections must be made such that the arrows go in the same direction in the wave flow diagram.
Digitizing Elementary Reflectances by Bilinear Transform