TDS-OFDM RECEIVER WITH IMPROVED RECEIVING PERFORMANCE BY EXTRACTING CHANNEL STATUS INFORMATION AND COMPENSATING OUTPUT SIGNAL OF FFT AFTER EQUALIZATION OF TIME DOMAIN, AND CHANNEL EQUALIZATION METHOD USING THE SAME

摘要

PURPOSE: A TDS-OFDM(Time Domain Synchronous Orthogonal Frequency Division Multiplexing) receiver and a channel equalization method are provided to improve receiving performance by extracting CSI(Channel Status Information) and compensating an output signal of an FFT(Fast Fourier Transform) after equalization of time domain. CONSTITUTION: A TDS-OFDM receiver comprises a synchronization unit(140) for performing a synchronization on an OFDM broadcast signal which is received through an antenna, down converted to a baseband, and analog-digital converted; a demultiplexer(160) for dividing the signal received from the synchronization unit into a plurality of signals including an OFDM symbol; an FFT unit(200) for performing FFT on the OFDM symbol; a CSI extraction unit(300) for extracting CSI on the basis of sub carrier power of each of the signals received from the FFT unit; a CSI compensation unit(400) for compensating for a channel distortion, for the Fast Fourier Transformed OFDM symbol received from the FFT unit, on the basis of the CSI received from the CSI extraction unit; and a forward error correction unit(600) for detecting and correcting error of the signal received from the CSI compensation unit.