Patent ID: 9112593
Filing Date: 2015-08-18
Classification: H04B

Abstract:
1. An apparatus for compensating for a timing offset in a spread spectrum system, the apparatus comprising: an oversampling unit configured to oversample, by a multiple P, data whose each of N symbols is spread over and received by C chips; an oversampled chip collection unit configured to collect 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 configured to despread each of collected oversampled chips using a unique code of a corresponding symbol; a peak value detection/storage unit configured to detect an oversampled chip having a largest correlation value among despread oversampled chips in every predetermined section, and then store sample indices of the detected oversampled chips as peak value sample indices; a timing offset calculation unit configured to calculate a chip clock timing offset O a downsampling unit configured to downsample the oversampled samples while compensating for the chip clock timing offset and the system clock timing offset.