Carrier recovery apparatus usable with vsb type receiver and method thereof

Carrier recovery apparatus usable with vsb type receiver and method thereof

  • CN 1,744,588 A
  • Filed: 08/26/2005
  • Published: 03/08/2006
  • Est. Priority Date: 08/27/2004
  • Status: Active Application
First Claim
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1. , a kind of carrier restorer that can be used for residual sideband (VSB) receiver, this equipment comprises:

  • Multiplier is used to receive the VSB modulated digital signal and multiply by the generation baseband vsb signal with the VSB modulated digital signal that is used for receiving mutually with the carrier signal of preset frequency;

    The reversing spectrum device is used for the upper sideband of baseband vsb signal and lower sideband are reversed so that wherein frequency spectrum is reversed;

    Following BECM unit is used for the signal of reversing spectrum is carried out frequency band sidewise component maximization (BECM) algorithm with based on phase information under the phase information of the baseband vsb signal of counter-rotating and the difference between the first predetermined reference phase information produce;

    Loop filter is used for the low band signal of phase information under coming from is carried out filtering;

    WithDigital controlled oscillator (NCO), be used to correct the frequency deviation of carrier signal and under the control of low band signal to the carrier signal of multiplier output correcting frequency offset.

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