Wireless transceiver system for supporting dual mode

摘要

The present invention relates to a wireless transceiver system for supporting a dual mode that simultaneously supports the Frequency Division Duplex (FDD) method and the Time Division Duplex (TDD) method in a certain frequency band. The present system supports the FDD system conducting transmission and reception simultaneously by using different frequency bands for transmission and reception as well as the TDD system temporally alternating transmission and reception by using the common frequency band among an upper frequency band and a lower frequency band used in the FDD system as well as another frequency band adjacent thereto, thereby selectively supporting both of the two communication systems in a wireless transceiver system.

主权项

1. A wireless transceiver system provided at a front-end of a system for supporting a dual mode, the wireless transceiver system comprising:
a first selecting switch connected to an antenna transmitting/receiving a radio signal, the first selecting switch determining a transmitting/receiving path of a signal according to a communication system; a first mixer for converting a transmission signal on the basis of a first frequency; a duplexer for transmitting a transmission signal converted at the first mixer to the antenna via the first selecting switch and for receiving a reception signal received through the antenna via the first selecting switch in a first communication system; a band-pass filter for receiving a reception signal, which is received through the antenna, via the first selecting switch, and extracting a signal in a predetermined frequency band from the reception signal in a second communication system; a second selecting switch for selecting and outputting a reception signal received through the duplexer in the first communication system, and for selecting and outputting a reception signal, which does not pass through the duplexer, received through the first selecting switch in the second communication system; a first local oscillator for oscillating a first frequency; a second local oscillator for oscillating a second frequency; and a second mixer for converting a reception signal outputted from the second selecting switch on the basis of the first frequency from the first local oscillator selected from among the first and second local oscillators in the first communication system and for converting a reception signal outputted from the second selecting switch on the basis of the second frequency from the second local oscillator selected from among the first and second local oscillators in the second communication system.