Patent ID: 8165237
Filing Date: 2012-04-24
Classification: H04L

Abstract:
1. A Digital Terrestrial Multimedia Broadcasting (DTMB)-based carrier mode detection system, comprising: a first Transmission Parameter Signaling (TPS) decoder, for receiving M frequency domain input signals to produce M first mask signals, and performing an absolute operation on the M first mask signals to select a maximum result as a first absolute maximum mask signal for output, where M is a positive integer; a first carrier mode calculator, for receiving N frequency domain input signals to calculate a sum of the N frequency domain input signals and produce a first summation carrier signal, and performing the absolute operation on the first summation carrier signal to produce a first absolute summation carrier signal, where N is a positive integer; a second TPS decoder, for receiving M time domain input signals to produce M second mask signals, and performing the absolute operation on the M second mask signals to select a maximum result as a second absolute maximum mask signal for output; a second carrier mode calculator for receiving N time domain input signals to calculate a sum of the N time domain input signals and produce a second summation carrier signal, and performing the absolute operation on the second summation carrier signal to produce a second absolute summation carrier signal; and a determinator, connected to the first TPS decoder, the first carrier calculator, the second TPS decoder and the second carrier calculator, for determining a carrier mode to be multi-carrier mode or single-carrier mode based on the first absolute maximum mask signal, the first absolute summation carrier signal, the second absolute maximum mask signal and the second absolute summation carrier signal.