Analog Integrated Circuits and Signal Processing

, Volume 73, Issue 3, pp 909–917 | Cite as

Mixed Cartesian feedback for Zero-IF WCDMA transmitter

  • N. Delaunay
  • M. Abid
  • B. Le Gal
  • D. Dallet
  • C. Rebai
  • N. Deltimple
  • D. Belot
  • E. Kerherve
Article

Abstract

In this paper, a new adaptive power amplifier (PA) linearization technique is presented. The idea is to consider a classic WCDMA zero-intermediate frequency (Zero-IF) transmitter with a modified Cartesian feedback (CFB) loop. The new transmitter architecture consists of an analog stage including forward I/Q modulator and feedback I/Q demodulator, and a digital stage adjusting the phase rotation around the loop. The whole system consumes 500 and 2.94 mW, respectively, for the analog and the digital part. System level simulation gave a maximum improvement of 35 dBc at 5 MHz from the carrier for the W-CDMA signal.

Keywords

Cartesian feedback loop WCDMA transmitter Architecture matching algorithm CMOS 65 nm technology 

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • N. Delaunay
    • 1
    • 2
  • M. Abid
    • 1
    • 3
  • B. Le Gal
    • 1
  • D. Dallet
    • 1
  • C. Rebai
    • 3
  • N. Deltimple
    • 1
  • D. Belot
    • 2
  • E. Kerherve
    • 1
  1. 1.Laboratoire IMS, CNRS UMR 5218, IPBUniversité de BordeauxTalenceFrance
  2. 2.STMicroelectronicsCrolles CedexFrance
  3. 3.CIRTA’COM Research Laboratory, SUP’COMUniversity of 7th November at CarthageTunisTunisia

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