Adaptive dual-loop algorithm for cancellation of time-varying offsets in direct conversion mixers Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/zc77ss72c

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  • The thesis presents a new algorithm and structure that is to be used in conjunction with a specially modified CMOS Gilbert cell mixer to remove time-varying DC offsets in direct conversion receivers. In our approach, the DC offset is detected at the output of the mixer using a dedicated coarse ADC and tracked using a low gate count digital structure. The estimated offset is then used to dynamically adjusting the bias of a specially modified Gilbert cell mixer to cancel the offset in the mixer. This prevents saturation and desensitization of the analog downstream stages. The presented approach is suitable for TDMA as well as continuous reception techniques such as W-CDMA and FH-SS while being fully integrable on-chip.
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  • File scanned at 300 ppi (Monochrome, 256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Submitted by Kirsten Clark (kcscannerosu@gmail.com) on 2012-08-23T22:26:18Z No. of bitstreams: 1 HolensteinChristian2001.pdf: 685888 bytes, checksum: ad703a23783ca2d878fad852fbdba06b (MD5)
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-08-24T19:34:50Z (GMT) No. of bitstreams: 1 HolensteinChristian2001.pdf: 685888 bytes, checksum: ad703a23783ca2d878fad852fbdba06b (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-08-24T19:37:11Z (GMT) No. of bitstreams: 1 HolensteinChristian2001.pdf: 685888 bytes, checksum: ad703a23783ca2d878fad852fbdba06b (MD5)

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