APPARATUS AND METHOD FOR COMPENSATING FOR TIMING OFFSET IN SPREAD SPECTRUM SYSTEM

Provided are an apparatus and method for compensating for a timing offset in a spread spectrum system which perform an oversampling of respective symbols to obtain a plurality of samples, estimate a chip clock timing offset and a symbol clock timing offset from the plurality of samples, and compensate for the chip clock timing offset and the symbol clock timing offset. The apparatus includes an oversampling unit (10) that oversamples, by a multiple P, data whose each of N symbols is spread over and received by C chips, an oversampled chip collection unit (20) that collects C, which is a number of chips, samples at positions apart from each of all the oversampled samples by the multiple P, which is the oversampling multiple, a despreading unit (30) that despreads each of collected oversampled chips using a unique code of the corresponding symbol, a peak value detection/storage unit (40) that detects an oversampled chip having a largest correlation value among despread oversampled chips in every predetermined section and then stores sample indices of the detected oversampled chips as peak value sample indices, a timing offset calculation unit (50) configured to calculate a chip clock timing offset O ct and a system clock timing offset O st using the respective peak value sample indices, and a downsampling unit (60) that downsamples the oversampled samples while compensating for the chip clock timing offset and the system clock timing offset.