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Characterization of SNDR Degradation in Nonlinear Wireless Transmitters

Santos, R. S. ; Carvalho, N.B.C.

Intrnl. Journal of RF and Microwave Computer-Aided Engineering Vol. 19, Nº 4, pp. 470 - 480, July, 2009.

ISSN (print): 1096-4290
ISSN (online): 1096-4290

Journal Impact Factor: 0,475 (in 2010)

Digital Object Identifier: 10.1002/mmce.20370

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This article presents a measurement strategy and a characterization bench
for the evaluation of Signal to Noise and Distortion Ratio (SNDR) in nonlinear wireless
systems when in presence of memory effects. This measurement proposal will be combined
with a closed analysis of the nonlinear mechanisms appearing in communication
systems presenting memory. The analysis of this memory mechanism, when the system is
excited by complex modulated signals with different statistics, will be a useful tool for
design engineers to evaluate the degradation of SNDR in nonlinear wireless systems.
Finally, the proposed measurement approach will be applied to a CDMA communication
system, by evaluating carefully the SNDR of that system.