Signal transmitting and receiving device

摘要

A signal to be transferred comprises a plurality of patterns each including a time region containing a plurality of frequency signals and a time region containing no frequency signal. When a signal to be transmitted is given in the form of numeric information, this signal is automatically patterned by a transmitter unit to provide a period containing predetermined frequency signals and a period containing no frequency signal. A receiver unit reproduces the sequentially transmitted frequency signals on the basis of the reception of the first transmitted frequency signal.