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Method and apparatus of signal processing and an inertial point device using the same

  • US 7,839,386 B2
  • Filed: 05/31/2007
  • Issued: 11/23/2010
  • Est. Priority Date: 11/14/2006
  • Status: Active Grant
First Claim
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1. A signal processing method, adapted for processing signals generated by a pointing device, comprising steps of:

  • acquiring an accelerating signal from the pointing device;

    forming a filtering signal by filtering the accelerating signal with a first filtering process;

    converting the filtering signal into a digital signal; and

    processing the digital signal with a second filtering process to form a processed signal;

    wherein the second filtering process further comprises the steps of;

    oversampling the digital signal for acquiring a plurality of sampled signals;

    performing Fourier transform upon the plural sampled signals for forming a plurality of spectrum signals accordingly; and

    filtering the plural spectrum signals while converting the plural filtered spectrum signals into the processed signal by reverse Fourier transform.

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