Pulse or digital communications – Testing – Data rate
Patent
1997-03-12
1999-10-12
Le, Amanda T.
Pulse or digital communications
Testing
Data rate
375227, 375334, 714704, 329303, H04B 346
Patent
active
059664061
ABSTRACT:
A method and apparatus for noise burst detection in a signal processor is provided. The method and apparatus is based on the zero-crossing rate (ZCR) of the received signal, which is defined as the number of times the magnitude of the received signal becomes zero during a specific counting period, to determine whether the received signal is a noise or a normal signal. The received signal is sampled at a specified sampling rate. Whether the signal waveform undergoes a zero-crossing is determined by comparing the polarity of the current sampled magnitude with that of the previous one. If the polarities are different, it indicates that the signal waveform has undergone a zero-crossing during the current sampling period; otherwise, it indicates that the signal waveform has not undergone a zero-crossing. The count of zero-crossing during each counting period is compared with a preset threshold value. If the count is larger than the threshold value, it indicates the received signal is noise; otherwise, the received signal is a normal signal.
REFERENCES:
patent: 4479092 (1984-10-01), Falconer
patent: 5007032 (1991-04-01), Jensen
patent: 5317522 (1994-05-01), Bonet et al.
patent: 5319573 (1994-06-01), Corleto et al.
Chen Hsin-Mei
Hsieh Chau-Kai
Le Amanda T.
Windbond Electronics Corp.
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