Nonlinear distortion model for VCO-PLL FM transmission systems

Author

Pedro, Jose C. ; Carvalho, Nuno B. ; Madureira, Raquel C.

Author_Institution

Inst. de Telecommun., Aveiro Univ., Portugal

Volume

46

Issue

3

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

348

Lastpage

352

Abstract

The nonlinear distortion of frequency or phase modulation systems composed by a voltage-controlled oscillator (VCO) modulator and a phase-locked loop (PLL) discriminator is addressed. Volterra series nonlinear transfer functions up to third order, for an LC Colpitts type modulator and a PLL with simultaneous nonlinear phase-detector and VCO, are combined as a cascade of mildly nonlinear systems. This approach gives a fully analytical description of that complex arrangement, which allowed the derivation of theoretical linearization conditions for that FM/PM modem

Keywords

Volterra series; discriminators; frequency modulation; nonlinear distortion; phase detectors; phase locked loops; transfer functions; voltage-controlled oscillators; LC Colpitts type modulator; VCO-PLL FM transmission systems; Volterra series nonlinear transfer functions; discriminator; linearization conditions; mildly nonlinear system cascade; nonlinear distortion model; nonlinear phase-detector; Circuits; Frequency modulation; Intermodulation distortion; Modems; Nonlinear distortion; Phase locked loops; Phase modulation; Signal processing; Transfer functions; Voltage-controlled oscillators;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.754868

Filename

754868