Electromagnetic spectrum detection device and method based on cognitive radio

The invention provides an electromagnetic spectrum detection device and method based on cognitive radio, and the device comprises a wireless module which is used for detecting and selecting an idle channel to transmit data, receiving the transmitted data, carrying out the judgment, transmitting a signal, and uploading the signal to a single-chip microcomputer; a single-chip microcomputer which obtains the signal and performs data transmission and then establishes communication; the display screen is used for displaying received address data and signals; and the power supply voltage stabilizing module is used for stabilizing the power supply voltage and then supplying power to the wireless module. According to the electromagnetic spectrum detection device and method based on cognitive radio, a reliable and effective spectrum allocation and sharing technology can be realized, a cognitive network can be efficiently accessed to a non-busy spectrum, and a main user is not disturbed by the cognitive network during