Abstract: Disclosed is a radio frequency (RF) front-end chip provided with a first antenna port and including a RF analog front-end module, a filtering module, and a switching module. The RF analog front-end module includes a first transceiver unit transmitting and receiving a signal of a first frequency band, and a second transceiver unit and a third transceiver unit transmitting and receiving a signal of a second frequency band. The filtering module transmits the received signal to the first transceiver unit or the second transceiver unit and the third transceiver unit based on the frequency band of the received signal. The switching module switches the first antenna port to the first transceiver unit, the second transceiver unit, the third transceiver unit or the filtering module, so that the first transceiver unit, the second transceiver unit or the third transceiver unit receives or transmits a signal through the first antenna port.

Abstract: A wireless receiving device includes a wake-up receiver, a main receiver and a calibration circuit. The wake-up receiver operates in a monitoring mode or a sleep mode. When operating in the monitoring mode, the wake-up receiver monitors whether a request signal is transmitted by a communication device and issues a wake-up signal after receiving the request signal. The main receiver operates in a sleep mode or a transmission mode. When operating in the sleep mode, the main receiver is woken up and enters the transmission mode to transmit and receive data to and from the communication device when receiving the wake-up signal. The calibration circuit is coupled to the wake-up receiver and the main receiver and configured to receive a calibration signal from the main receiver and calibrate a reception frequency of the wake-up receiver in the background in response to the calibration signal.

Abstract: A wireless receiving device includes a wake-up receiver, a main receiver and a calibration circuit. The wake-up receiver operates in a monitoring mode or a sleep mode. When operating in the monitoring mode, the wake-up receiver monitors whether a request signal is transmitted by a communication device and issues a wake-up signal after receiving the request signal. The main receiver operates in a sleep mode or a transmission mode. When operating in the sleep mode, the main receiver is woken up and enters the transmission mode to transmit and receive data to and from the communication device when receiving the wake-up signal. The calibration circuit is coupled to the wake-up receiver and the main receiver and configured to receive a calibration signal from the main receiver and calibrate a reception frequency of the wake-up receiver in the background in response to the calibration signal.