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Analysis of data spectral regrowth from nonlinear amplification

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2 Author(s)
Amoroso, Frank ; 271-D West Alton Street, Santa Ana, CA 92707 USA ; Monzingo, Robert A.

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 regrowth 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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Communications and Networks, Journal of  (Volume:1 ,  Issue: 2 )