Discriminating apparatus for digital audio broadcasting

Details Discriminating apparatus for digital audio broadcasting Discriminating apparatus for digital audio broadcasting

1997-11-12

2000-04-04

Tse, Young T.

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

H04L 2722

Patent

active

060470348

ABSTRACT:
A discriminating apparatus for digital audio broadcasting according to the present invention includes a delay means for delaying an input signal by a time corresponding to a period of an effective symbol in a symbol, a correlation means for judging whether any correlation exists or not between the input signal and a delayed signal from the delay means, a moving average means for calculating a moving average of an output of the correlation means in a period corresponding to a guard interval in the symbol, and a comparing means for comparing an output of the moving average means with a threshold level. It is determined based on an output of the comparing means whether or not the input signal is a digital audio broadcasting signal.

REFERENCES:
patent: 5233632 (1993-08-01), Baum et al.
patent: 5373507 (1994-12-01), Skold
patent: 5748686 (1998-05-01), Langberg et al.
patent: 5978416 (1999-11-01), Watanabe et al.

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