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- W1969203387 abstract "In digital microwave communication, a power amplifier is located at the transmitting side. Generally, such a power amplifier has a nonlinear input-output characteristic. However, the greatest problem with this kind of nonlinear transmission system is the spectrum width of the signals. Until now, a spectrum has been obtained by approximating the input-output characteristics of a power amplifier by third-order equations. When third-order equations are used, however, only one sidelobe appears in the spectrum. to obtain a more detailed spectrum, the input-output characteristics of the power amplifier must be approximated by equations of higher than third-order. This paper presents equations for the power spectral density of multilevel digital output signals of a transmission system. the system consists of a power amplifier having an input-output characteristic which can be approximated by a filter and fifth-order equations. Consequently, it has become possible to compute a power spectral density, for example, for quadrature amplitude modulation (QAM) having more than 32 levels, which was difficult to obtain by the simulation method. Examples show the results of computations for power spectral densities of 16- and 32-level QAMs." @default.
- W1969203387 created "2016-06-24" @default.
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- W1969203387 date "1983-01-01" @default.
- W1969203387 modified "2023-09-27" @default.
- W1969203387 title "Power spectral density of multilevel digital signals in nonlinear channels" @default.
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- W1969203387 doi "https://doi.org/10.1002/ecja.4400660209" @default.
- W1969203387 hasPublicationYear "1983" @default.
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