Patent ID: 6950515

Claim:
A telecommunication system, which communicates using a full-duplex data transmission system via a second communication line positioned in vicinity of a first communication line of a system that is synchronized with a reference signal and uses half-duplex data transmission system, the telecommunication system comprising: an analog-to-digital converter for converting an analog signal received via the second communication line into a digital signal, wherein the analog signal is a TCM timing reference (TTR) indication signal during a predetermined time and the data signal after that time is over; a first-in first-out (FIFO) buffer for serially storing the digital signal outputted from the analog-to-digital converter and for serially outputting the digital signal in stored order; a fast Fourier transformer (FFT) for converting the digital signal of a time region outputted from the FIFO buffer into a signal of a frequency region and for outputting a phase of a transformed signal; a receive data processor for receiving the signal of the frequency region outputted from the FFT to decode a received signal to an original signal; and a synchronization circuit for receiving a series of phase information from the FFT and for controlling the receive data processor to synchronize with the data signal among signals output from the FFT; wherein the synchronization circuit comprises: a symbol detector for receiving the phase from the FFT, for detecting which one of the symbols corresponds to a currently inputted phase, and for outputting difference between a prior inputted phase and the currently inputted phase when the currently inputted phase corresponds to none of the symbols; a phase controller for controlling the FIFO buffer such that digital signals of a time corresponding to the phase difference are removed among the digital signals stored in the FIFO buffer; a memory for storing the symbols detected by the symbol detector; and a correlator for correlating the symbols stored in the memory and symbols of frames constituting a hyperframe and for controlling the receive data processor to receive the data signal inputted after the TTR indication signal.