TRANSMISSION LINE PRESUMING CIRCUIT AND MODEM USING THE SAME

摘要

The transmission line between the sending radio terminal (141) and the receiving radio terminal is geometrically modeled. Using the model of the transmission line, the transmission antenna (151) is located. Based on the result of location, the path is presumedly determined, and a transmission line of better state is selected for high quality communication. A geometric information inputting device (11) including an on-vehicle camera (120) geometrically captures information about the state of the circumference. A geometric information recognizing device (12) searches the captured geometric information for the transmission antenna (151) of the party and outputs the information about the position of the antenna (151). A model generating device (13) generates a transmission line model based on the geometric information from the device (11) and the information about the position of the antenna (151) from the device (12).