| 摘要 |
A method for processing a received signal comprising a plurality of symbols, such as a COFDM DVB-T signal, to determine a size of a guard interval therein, in which a correlation function is formed from the received samples, the correlation function having peaks, and the separation between peaks in the correlation function depending on a total duration of a symbol plus a guard interval. The correlation function is passed through a plurality of resonators, each of the resonators having a respective resonance frequency which corresponds to a total duration of a symbol plus an available guard interval, and the size of the guard interval is determined as being the guard interval corresponding to the resonator with the highest output power. The mode of the received signals can also be determined, by passing the correlation function through resonators which have respective resonance frequencies which correspond to a total duration of a symbol in an available mode, plus an available guard interval. <IMAGE> |
