TRANSMISSION APPARATUS, TRANSMISSION METHOD, TRANSMISSION CONTROL PROGRAM, MEDIUM CONTAINING TRANSMISSION CONTROL PROGRAM, RECEPTION APPARATUS, RECEPTION METHOD, RECEPTION CONTROL PROGRAM, AND MEDIUM CONTAINING RECEPTION CONTROL PROGRAM

摘要

The object of the present invention is to realize a radio wave detecting apparatus that can perform carrier sense of radio waves subjected to spread spectrum with a simple configuration. A spread code is multiplied by an information signal S1, the band is spread, and a spread information signal S7 is generated. A beacon signal S10 in a predetermined band is synthesized with the above spread information signal S7, and the synthesized signal is transmitted as a radio wave. Furthermore, only a signal component in a predetermined band is extracted from a received radio wave, so that a beacon signal S11 is separated. The presence of a radio wave is detected based on the receiving power of the separated beacon signal S11. If the presence of the above radio wave is detected, the transmission of the radio wave is stopped.