Patent ID: 8433021
Filing Date: 2013-04-30
Classification: H04L

Abstract:
1. An apparatus for determining symbol synchronization information for an OFDM (Orthogonal Frequency Division Multiplexing) signal, the OFDM signal comprising at least an OFDM symbol and a GI (Guard Interval) corresponding to the OFDM symbol, the apparatus comprising: a correlator, configured to generate a correlation signal based on each OFDM symbol and its corresponding GI; a peak signal generator, configured to process the correlation signal to generate a first conditional signal comprising at least two local peaks; a a converter, configured to convert the first conditional signal into a second conditional signal comprising a global peak, wherein the converter comprises: a delayer, configured to delay the first conditional signal by a predefined delay; and a subtracter, configured to subtract the delayed first conditional signal from the first conditional signal to generate the second conditional signal; and a detector, configured to detect the global peak to obtain the symbol synchronization information corresponding to the global peak.