Methods of automatically detecting spectrum inversion and...

Details Methods of automatically detecting spectrum inversion and... Methods of automatically detecting spectrum inversion and...

2005-11-08

2008-12-09

Kim, Kevin Y (Department: 2611)

Pulse or digital communications

Receivers

C375S150000

Reexamination Certificate

active

07463699

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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Combined Search and Examination Report under Sections 17 & 18 (3) from the British Patent Office dated Mar. 9, 2006.

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