Methods of automatically detecting spectrum inversion and related terrestrial digital video broadcasting receivers
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United States of America Patent
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Dec 9, 2008
Grant Date -
May 11, 2006
app pub date -
Nov 8, 2005
filing date -
Nov 11, 2004
priority date (Note) -
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Abstract
DVB-T receivers and methods may provide automatic detection of spectrum inversion using continual pilot correlation. A DVB-T receiver may include a demodulator, a fast Fourier transformation (FFT) unit, and a spectrum inversion detector. The demodulator may demodulate a received DVB-T digital signal according to a spectrum inversion signal, and the FFT unit may perform fast Fourier transformation (FFT) on the demodulated signal. The spectrum inversion detector may calculate continual pilot correlation values for the FFT-processed signal and may generate the spectrum inversion signal to indicate whether spectrum inversion has occurred according to the calculated correlation values. The DVB-T receiver may perform normal correlation and position inversion correlation on continual pilots using a spectrum inversion detector to automatically detect whether spectrum inversion has occurred. Related methods are also discussed.
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