Symbol clock recovery for the ATSC digital television signal
OwnerJames J. Spilker JR.inventor
Life of this patent
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Abstract
A method, apparatus, and computer-readable media for recovering a symbol clock signal from an American Television Standards Committee (ATSC) digital television (DTV) signal comprises coherently downconverting the ATSC DTV signal to a baseband signal; delaying the baseband signal; multiplying the baseband signal and the delayed baseband signal; band-pass filtering the symbol clock signal; and generating the symbol clock signal based on the filtered baseband signal.
Claims20
An apparatus for recovering a symbol clock signal from an American Television Standards Committee (ATSC) digital television (DTV) signal, the apparatus comprising:
- a downconverter adapted to coherently downconvert the ATSC DTV signal to a baseband signal;
- a delay unit adapted to delay the baseband signal;
- a multiplier adapted to multiply the baseband signal and the delayed baseband signal;
- a band-pass filter adapted to pass a frequency component of the symbol clock signal;
- and
- a phase-locked loop to generate the symbol clock signal based on an output of the band-pass filter.
An apparatus for recovering a symbol clock signal from an American Television Standards Committee (ATSC) digital television (DTV) signal, the apparatus comprising:
- downconverter means for coherently downconverting the ATSC DTV signal to a baseband signal;
- delay means for delaying the baseband signal;
- multiplier means for multiplying the baseband signal and the delayed baseband signal;
- band-pass filter means for passing a frequency component of the symbol clock signal;
- and
- phase-locked loop means for generating the symbol clock signal based on an output of the band-pass filter.
A method for recovering a symbol clock signal from an American Television Standards Committee (ATSC) digital television (DTV) signal, the method comprising:
- coherently downconverting the ATSC DTV signal to a baseband signal;
- delaying the baseband signal;
- multiplying the baseband signal and the delayed baseband signal;
- band-pass filtering the symbol clock signal;
- and
- generating the symbol clock signal based on the filtered baseband signal.
Computer-readable media embodying instructions executable by a computer to perform a method for recovering a symbol clock signal from an American Television Standards Committee (ATSC) digital television (DTV) signal, the method comprising:
- coherently downconverting the ATSC DTV signal to a baseband signal;
- delaying the baseband signal;
- multiplying the baseband signal and the delayed baseband signal;
- band-pass filtering the symbol clock signal;
- and
- generating the symbol clock signal based on the filtered baseband signal.
Dependencies are inferred from the claim text.