Patent ID: 7746941
Filing Date: 2010-06-29
Classification: H04L

Abstract:
1. A synchronization apparatus for symbol timing synchronization of an OFDM-FDMA/CDMA/TDMA system having a preamble structure in which patterns are repeated three times in time domain, the synchronization apparatus comprising: an auto-correlator for calculating an auto-correlation value of a received signal and a signal delayed by N a power detector for calculating power of the received signal in order to normalize the auto-correlation value; a timing metric/normalizer for normalizing the auto-correlation value by dividing the auto-correlation value by the calculated power to obtain a timing metric; and a peak detector for finding a peak value of the timing metric by measuring one frame while moving by one sample from an arbitrary staffing point and estimating a frame starting position and an initial symbol timing, wherein the auto-correlator calculates the auto-correlation value by applying (2N