NDLI: Simulation of the Effects of Q-Band Amplifier Nonlinearities on Non-Constant Envelope SATCOM Waveforms

Content Provider	IEEE Xplore Digital Library
Author	Gels, Bob Andrews, Mac Hendry, David
Copyright Year	2007
Description	Author affiliation: Raytheon, Network Centric Systems, Marlboro, Massachusetts (Gels, Bob; Andrews, Mac; Hendry, David)
Abstract	Due to their higher spectral efficiency, non-constant envelope modulation RF waveforms are becoming more important in a variety of communication systems. For this reason, a series of non-constant waveforms (BPSK, QPSK, 8PSK, and 12/4 QAM) have been evaluated for use in future satellite systems. Some prior satellite communications systems relied on constant envelope waveforms, such as Gaussian Minimum Shift Keying (GMSK). The solid state power amplifiers (SSPA) for these systems were designed with those waveforms in mind. It is of interest to determine how these amplifiers will perform with the non-constant envelope waveforms in order to evaluate their usable output power capability. A model of a Q-Band SSPA, based on AM-AM and AM-PM measurements, was incorporated in an Agilent Advanced Design System (ADS) Ptolemy simulation. The effects of the power amplifier nonlinearities on error vector magnitude (EVM), spectral re-growth, adjacent channel interference (ACI) and chip error rate (CER) throughput performance were evaluated. Of particular interest was the amount of spectral re-growth and ACI as a function of output power back-off of the SSPA from full power.
Starting Page	1
Ending Page	6
File Size	367590
Page Count	6
File Format	PDF
ISBN	9781424415120
DOI	10.1109/MILCOM.2007.4454791
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power amplifiers Power generation Radiofrequency amplifiers Radio frequency Binary phase shift keying Quadrature phase shift keying Quadrature amplitude modulation Satellite communication Solid state circuits Performance evaluation
Content Type	Text
Resource Type	Article

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