Method and apparatus for symbol synchronisation in a multicarrier receiver

摘要

An orthogonal frequency division multiplex (OFDM) receiving system for estimating a symbol timing offset with less influence by a channel with a small amount of calculation, and a method for the same are provided. The method includes extracting a scattered pilot, which is inserted into a symbol at regular sample intervals, from a received OFDM signal, multiplying the current extracted scattered pilot by a known scattered pilot pattern to obtain a complex number of the current scattered pilot, multiplying the complex number of the current scattered pilot by a complex number of a previous scattered pilot and separately accumulating real parts and imaginary 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 estimating a timing offset for controlling a fast Fourier transform (FFT) start point and a sampling clock signal.