Carrier tracking for AM in-band on channel radio receivers

Carrier tracking for AM in-band on channel radio receivers

  • CN 101,310,496 B
  • Filed: 11/10/2006
  • Issued: 04/01/2015
  • Est. Priority Date: 11/14/2005
  • Status: Active Grant
First Claim
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1. , for carrying out a method for carrier tracking in AM in-band on-channel wireless receiver, the method comprising the steps of:

  • Receive input signal;

    Local oscillator signals is generated in response to oscillator control signal;

    Input signal is mixed mutually with local oscillator signals, to produce the first signal;

    Filter the first signal, to produce the first signal after filtering by the sampling rate of selection;

    Detect phase error and the frequency error of the first signal after filtering, the first signal after this filtration is normalized the impact alleviating signal fadeout;

    In response to phase error and the frequency error of the first signal after filtration, self-adaption loop filter is used to produce oscillator control signal;

    In response to the first signal after filtration, calculated gains control signal;

    AndThe first signal times with gain control signal, to produce output signal, wherein, what use gain control signal square maintains constant damping factor.

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