Intermodulation and noise power ratio analysis of multiple-carrier amplifiers using discrete fourier transform

Tadashi Takagi, Satoshi Ogura, Yukio Ikeda, Noriharu Suematsu

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

A novel analysis method of the intermodulation (IM) and the noise power ratio (NPR) of multiple-carrier amplifiers is described. This method, based on Discrete Fourier Transform, allows an accurate calculation of IM and NPR of the amplifier having multiple carriers by directly using measured single-carrier amplitude and phase characteristics. This method has an outstanding feature in that it can be applied to the general case of n carriers having an arbitrary power level as long as frequency-dependence of amplitude and phase characteristics is negligibly small. Applying this method to the linearized amplifier, a good agreement between measured and calculated results for IM3, IM5, and NPR has been obtained for operation from linear up to saturation, which shows this method would be a good candidate for calculating IM and NPR of multiple-carrier amplifiers.

Original languageEnglish
Pages (from-to)935-941
Number of pages7
JournalIEICE Transactions on Electronics
VolumeE77-C
Issue number6
Publication statusPublished - 1994 Jun 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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