APPARATUS AND METHOD FOR ESTIMATING FREQUENCY OFFSET

摘要

An apparatus and a method for estimating a frequency offset are provided to prevent the performance of estimating the frequency offset from being deteriorated due to multipath and to reduce power consumption in the other area except a cell boundary. A cross-correlation unit(301) correlates first and second parts of a reception reference signal with a reference signal previously stored to output first and second cross-correlation signals. A first sample accumulator accumulates the first cross-correlation signals output from the cross-correlation section by N/2 numbers. A second sample accumulator accumulates the second cross-correlation signals output from the cross-correlation section by N/2 numbers. A phase calculator(303) calculates a phase of a frequency offset by using signals output from the first and the second sample accumulators. A frequency offset estimator(306) estimates a frequency offset using complex number output from the phase calculator.