Method and system for joint mode and guard interval detection

Abstract

An exemplary embodiment provides a system for detecting guard interval size and mode of a broadcasting signal comprising m potential guard interval size varieties and n potential mode varieties, in which each potential mode defines an OFDM symbol period. A detection method implemented by the system is also provided. The system comprises an ADC, n mode detectors, and an arbitrator. The ADC samples the broadcasting signal to form a digital signal. Each mode detector is associated with a presuming mode and OFDM symbol period, synchronously receiving the digital signal from the ADC and performing detection processes based thereon, and n corresponding flags are generated to indicate the detection results. The arbitrator is coupled to the outputs of the mode detectors, observing the flags generated therefrom to determine the guard interval size and mode of the broadcasting signal. When the guard interval size and mode of the broadcasting signal are determined by one of the mode detectors, the arbitrator further terminates the operations of the other mode detectors.

Dependencies are inferred from the claim text.