TRANSMISSION SYSTEM AND REPEATING DEVICE

PROBLEM TO BE SOLVED: To provide a transmission system and a repeating device capable of transmitting or repeating a plurality of signals inexpensively via an electric transmission line.SOLUTION: A transmission system 100 comprises: a first transmission device 10; and second transmission devices 50A, 50B for connection with the first transmission device 10 via an electric transmission line EL. The first transmission device 10 includes a conversion unit for converting a plurality of wireless signals F, Finto a plurality of first transmission signals having frequencies different from each other based on a first reference frequency, and a transmission unit for transmitting a first reference signal of a first reference frequency and a plurality of first transmission signals, while synthesizing the first reference signal and the first transmission signals, via the electric transmission line EL. The second transmission devices 50A, 50B include a reconversion unit for converting a plurality of first transmission signals into a plurality of wireless signals F, Fbased on the first reference signal, and a plurality of antennas for transmitting the corresponding wireless signals out of the plurality of wireless signals thus converted.