RESIDUAL CARRIER FREQUENCY OFFSET ESTIMATION AND CORRECTION IN OFDM MULTI-ANTENNA SYSTEMS

摘要

Method, system and computer program for estimating a residual carrier frequency offset of an OFDM signal, the method comprising the steps of: receiving at at least one receiving antenna at least one OFDM signal, said OFDM signal comprising a preamble and a data frame, said data frame comprising a plurality of OFDM symbols; sampling said plurality of OFDM symbols; acquiring a channel estimate from said OFDM signal; wherein for each group of samples of each OFDM symbol, performing a Discrete Fourier Transform; from the result of each Discrete Fourier Transform, selecting the samples at the pilot subcarriers; from said samples at the pilot subcarriers and said channel estimate, calculating an estimate of the phase shift between consecutive OFDM symbols due to said residual carrier frequency offset. Correction of residual carrier frequency offset.