ESTIMATION AND COMPENSATION OF FREQUENCY OFFSET IN MB-OFDM UWB SYSTEM USING TIME FREQUENCY HOPPING

摘要

present invention the time-frequency hopping scheme used for MB-OFDM UWB system, the frequency offset estimation and compensation method and relates to an apparatus, ; to use a multi-band orthogonal frequency division multiple time-frequency hopping scheme in a second frequency offset estimation and compensation method in a broadband system, a plurality of frequencies used in frequency hopping a first step of calculating the second value (Y) and the first value (X) be the tangent with the transmitted PS input symbols in the same frequency band for the one frequency band of the band; The first value (X) and the using the second value (Y) tan (X / Y) to obtain a value, tan from the conversion look-up table configured to reflect the relative frequency offset of the center frequency (X / Y) value a second step of calculating the index that corresponds to; A third step of calculating an index representing the estimated frequency offset amount with respect to the rest of the frequency band used in the frequency hopping from the conversion look-up table with the index calculated at said second step; A fourth step of extracting the NCO index, according to the compensation position for each of a plurality of frequency bands by using the calculated index in the third step; And using the NCO of the indexes extracted from the fourth step to a fifth step of compensating a frequency offset using the estimated amount of the NCO of the table according to the time-frequency pattern.