Title :
Nonlinear distortion study of FM transmission systems composed by a VCO-PLL association
Author :
Pedro, J.C. ; Carvalho, N.B. ; Madureira, R.C.
Author_Institution :
Inst. de Telecomunicacoes, Aveiro Univ., Portugal
Abstract :
The nonlinear distortion that arises in an FM transmission system composed by a VCO-PLL association is studied. Both VCO-modulator and PLL-discriminator, are assumed to be nonlinear in what voltage-frequency modulation characteristics are concerned. They were represented by Volterra functionals up to the 3rd order, from which the complete system´s functionals were derived. This model allowed analytical calculations, which showed that very linear performance can be obtained if certain conditions are met
Keywords :
Volterra equations; discriminators; electric distortion; frequency modulation; functional equations; modulators; phase locked loops; voltage-controlled oscillators; FM transmission systems; PLL-discriminator; VCO-PLL association; VCO-modulator; Volterra functionals; linear performance; nonlinear distortion; voltage-frequency modulation characteristics; Analytical models; Circuit analysis; Frequency conversion; Frequency modulation; Nonlinear distortion; Performance analysis; Phase locked loops; Telecommunications; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.621875
