Signal-to-Noise Ratio of Arbitrary Power-Series Nonlinear Amplifier

Iwao Sasase, Shinsaku Mori, Masanori Shinriki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A general analysis of the effect of an arbitrarv power-series nonlinear amplifier followed by a coherent mixing device on signal-tonoise ratio (SNR) is performed. An expression is derised for the improvement factor which is defined as the logarithm of the ratio of the output SNR to the input SNR. This expression is applicable to the coherent amplitude detector and phase locked loop as well as noncoherent amplifier bv appropriate selections of the detection angle. Moreover, the improvement factor can be obtained for noise with an arbitrary amplitude distribution. To demonstrate the applicability of this analysis, the improvement factors of the nonlinear amplifiers such as a power-law amplifier and a power-series amplifier with positive and negative discriminations are numerically calculated for the cases where the input noise amplitude distributions are Rician and triangular.

Original languageEnglish
Pages (from-to)40-48
Number of pages9
JournalIEEE Transactions on Aerospace and Electronic Systems
Issue number1
Publication statusPublished - 1983 Jan

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering


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