Abstract: Provided is a system for implementing a broadband radio frequency (RF) communication. The system includes a first phase locked loop (PLL) unit configured to generate a first clock based on a reference clock; and a second PLL unit configured to generate a second clock based on the first clock generated by the first PLL unit and a baseband signal generated by demodulating a reception signal. The second clock is provided to the first PLL unit as the reference clock, and a carrier frequency used for demodulating the reception signal is determined by the first clock.