ORTHOGONAL FREQUENCY DIVISION MULTIPLEX RECEIVING SYSTEM AND METHOD FOR EFFICIENTLY ESTIMATING SYMBOL TIMING OFFSET

摘要

PROBLEM TO BE SOLVED: To provide an orthogonal frequency division multiplex(OFDM) receiving system and method for estimating a symbol timing offset being less subject to a channel with a small amount of calculation. SOLUTION: The method includes a step of extracting a scattered pilot, which is inserted into a symbol at regular sample intervals, from a received OFDM signal, a step of multiplying the current extracted scattered pilot by a known scattered pilot pattern to obtain a complex number of the current scattered pilot, a step of multiplying the complex number of the current scattered pilot and separately accumulating real parts of the results of the multiplication of complex numbers during a predetermined symbol period, and estimating a phase using an accumulation of real parts and an accumulation of imaginary parts, and a step of estimating a timing offset for controlling a fast Fourier transform(FFT) start point and a sampling clock signal.