Patent ID: 8311175
Filing Date: 2012-11-13
Classification: H04B

Abstract:
1. A time division duplex communication apparatus for alternately transmitting and receiving a frame through time division, comprising: an analog front end configured to output a transmitting frame to outside, receive a receiving frame from outside, and recover a clock and data of a receiving signal through a clock recovery and data retiming circuit; a transmitter configured to generate the transmitting frame by operating with a clock signal of a reference frequency, which is generated from the clock recovery and data retiming circuit, in a transmission time interval; a receiver configured to process data, which is recovered in the analog front end, by operating with a clock signal, which is recovered from the receiving frame by the clock recovery and data retiming circuit, in a reception time interval; and a control unit configured to control the clock recovery and data retiming circuit to output the clock signal of the reference frequency in the transmission time interval and to output the clock signal recovered from the receiving frame in the reception time interval, wherein the control unit controls the clock recovery and data retiming circuit to output the clock signal of the reference frequency when there is no receiving frame input from outside in the reception time interval.