Three-Points Modulator Based on DPLL for Wideband Polar Modulation - Communications and Network

CN > Vol.5 No.3, September 2013

Three-Points Modulator Based on DPLL for Wideband Polar Modulation ()

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Download as PDF (Size: 188KB) PP. 140-143

DOI: 10.4236/cn.2013.53B2027 4,193 Downloads 5,386 Views Citations

Author(s)

Julien Kieffer, Sébastien Rieubon, Marc Houdebine, Sébastien Dedieu, Emil Novakov

Affiliation(s)

IMEP-LAHC, University of Grenoble-Alpes, Grenoble, France.
ST-Ericsson, Grenoble, France.
STMicroelectronics, Crolles, France.

ABSTRACT

We present a nonlinear event-driven model of a Digital PLL used in the context of a polar modulation. This modeling has shown that the estimation method of the TDC gain has a big impact on the EVM for wideband modulation and a solution has been proposed which consists to add the modulation on the gain after calibration of the gain offset. This transforms the classical two-points modulator into a three-points modulator. This implementation has been validated for WCDMA standard.

KEYWORDS

DPLL; Polar Modulation; WCDMA; TDC

Share and Cite:

Kieffer, J. , Rieubon, S. , Houdebine, M. , Dedieu, S. and Novakov, E. (2013) Three-Points Modulator Based on DPLL for Wideband Polar Modulation. Communications and Network, 5, 140-143. doi: 10.4236/cn.2013.53B2027.

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