Communication device

In a communication device for receiving signals from devices that become communication partners, received signals from the respective devices are identified. Each of the devices that become communication partners is provided with a frequency spectrum of a pattern specific to each of the devices. The communication device stores correspondence between information identifying the devices that become communication partners and the frequency spectrums provided to the respective devices, acquires a frequency spectrum contained in a received signal, compares the frequency spectrum acquired with the frequency spectrums stored to identify a device corresponding to the frequency spectrum that coincides with the frequency spectrum acquired and which is stored.