국가지식-학술정보
Analysis of Data Spectral Regrowth from Nonlinear Amplification
Analysis of Data Spectral Regrowth from Nonlinear Amplification
- 한국통신학회
- Journal of Communications and Networks
- Vol.1 No.2
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1999.0181 - 85 (5 pages)
- 0
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The regrowth of OQPSK power spectral sidelobes from AM/AM and AM/PM amplifier nonlinearity is analyzed. The time-domain expression for amplifier output shows how spectral re-growth will depend on the cubic coefficient of the Taylor's series of the amplifier nonlinearity as well as input amplitude ripple. Closed form spectrum calculations show that the spectral sidelobes produced by AM/PM take the same form as those produced by AM/AM. The rate of growth of AM/PM sidelobes is, however, not as great as for AM/AM.
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