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Reducing DC offsets using spectral spreading

  • US 7,272,164 B2
  • Filed: 12/10/2002
  • Issued: 09/18/2007
  • Est. Priority Date: 04/16/1999
  • Status: Expired due to Fees
First Claim
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1. An apparatus for down-converting an electromagnetic signal, comprising:

  • (1) a frequency down-conversion module to down-convert and spectrally spread an input signal to produce a down-converted spread spectrum signal, wherein said frequency down-conversion module under-samples said input signal according to a control signal, wherein said control signal comprises a coded sequence; and

    (2) a multiplier that de-spreads said down-converted spread spectrum signal according to said coded sequence.

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