Patent ID: 7835476
Filing Date: 2010-11-16
Classification: H04B,H04L

Abstract:
1. A method for receiving an Orthogonal Frequency Division Multiplexed (OFDM) signal, comprising: receiving an OFDM signal formed by a plurality of OFDM symbols respectively including data subcarriers to which data signals are allocated and pilot subcarriers to which pilot signals are allocated, where signal values of the pilot signals are cyclically shifted in frequency domain for each OFDM symbol; estimating phase errors of the pilot signals to generate first estimated values related to a phase offset of an OFDM symbol corresponding to each two or more OFDM symbols in the OFDM signal; performing weighting additions on the first estimated values to obtain one second estimate related to the offset; compensating the offset by using the second estimated value to obtain a compensated OFDM signal; and decoding the compensated OFDM signal to reproduce the data signals, wherein the OFDM signal is configured so that pilot signals P where M is a number of the pilot subcarriers, α is an arbitrary complex number, and δ is a delta function, the pilot signals P estimating the phase errors generates N pieces of first distortion estimated values corresponding to each N OFDM symbols.