Some properties of multiple carriers and intermodulation

Author

Gans, Michael J.

Author_Institution

AT&T Bell Lab., Holmdel, NJ, USA

fYear

1993

fDate

18-20 May 1993

Firstpage

883

Lastpage

886

Abstract

The statistics of the amplitude of a sum of sinusoids with more-or-less equal spacing in frequency are examined, with emphasis on the short quasi-periodic peaks characteristic of such sums. Various choices of reference phase for the sinusoids are considered, along with their effect on the amplitude peaks. By assuming a small cubic nonlinearity for an amplifier being fed by the sum of sinusoids, the output intermodulation peaking is related to the quasi-periodic peaking of the input amplitude. To explore a possible mechanism for slow variations in the relative reference phases of the sinusoids, the effect of passing flicker noise through the closed loop filter response of a phase-locked loop is considered

Keywords

closed loop systems; filtering theory; flicker noise; frequency division multiplexing; frequency synthesizers; intermodulation; phase locked loops; radiofrequency amplifiers; amplifier; closed loop filter response; cubic nonlinearity; flicker noise; multiple carriers; output intermodulation peaking; phase-locked loop; reference phases; short quasi-periodic peaks; statistics; sum of sinusoids; Fourier series; Frequency; Robustness; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1993., 43rd IEEE

Conference_Location

Secaucus, NJ

ISSN

1090-3038

Print_ISBN

0-7803-1267-8

Type

conf

DOI

10.1109/VETEC.1993.510952

Filename

510952