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. © 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2009.

REFERENCES

1 K.M. Gharaibeh,K. Gard, and M. Steer, Accurate estimation of digital communication system metrics—SNR, EVM and in a nonlinear amplifier environment, ARTFG Microwave Measurements Conference, Honolulu, Hawaii, 2004.
Google Scholar
2 P.M. Lavrador,de N.B. Carvalho, and J.C. Pedro, Evaluation of signal-to-noise and distortion ratio degradation in nonlinear systems. IEEE Trans Microwave Theory Tech 52( 2004), 813–822.
10.1109/TMTT.2004.823543
Web of Science® Google Scholar
3 V. Aparin, Analysis of CDMA signal spectral regrowth and waveform quality. IEEE Trans Microwave Theory Tech 49( 2001), 2306–2314.
10.1109/22.971614
Web of Science® Google Scholar
4 K.G. Gard,H.M. Gutierrez, and M.B. Steer, Characterization of spectral regrowth in microwave amplifiers based on the nonlinear transformation of a complex Gaussian process. IEEE Trans Microwave Theory Tech 47( 1999), 1059–1069.
10.1109/22.775437
Web of Science® Google Scholar
5 K.M. Gharaibeh,K. Gard, and M.B. Steer, The impact of nonlinear amplification on the performance of CDMA systems. IEEE Radio Wireless Conf( 2004), 83–86.
Google Scholar
6 R.E. Santos,N.B. Carvalho, and K. Gard, The impact of long term memory effects in wireless QPSK modulated signals, International Microwave Symposium, Honolulu, 2007, pp. 961–964.
Google Scholar
7 J.C. Pedro and N.B. Carvalho, Intermodulation distortion in microwave and wireless circuits, Artech House, Norwood MA, 2003.
Google Scholar
8 J.C. Pedro and N. Borges de Carvalho, Evaluating co-channel distortion ratio in microwave power amplifiers. IEEE Trans Microwave Theory Tech 49(Part 1)( 2001), 1777–1784.
10.1109/22.954784
Web of Science® Google Scholar
9 H. Ku,W. Woo, and J.S. Kenney, Carrier-to-interference ratio prediction of nonlinear RF devices. Microwave J 44( 2001), 154–164.
Web of Science® Google Scholar
10 J. Bendat, Random data: Analysis and measurement procedures, 3rd ed. New York, Wiley, 2000.
Google Scholar
11 J.P. Martins,P.M. Cabral,N. Borges Carvalho, and J.C. Pedro, A metric for the quantification of memory effects in power amplifiers. IEEE Trans Microwave Theory Tech 54 (Part 2)( 2006), 4432–4439.
10.1109/TMTT.2006.882871
Web of Science® Google Scholar
12 J.P. Martins,N.B. Carvalho, and J.C. Pedro, Intermodulation distortion of third-order nonlinear systems with memory under multisine excitations. IEEE Trans Microwave Theory Tech 55(Part 2)( 2007), 1264–1271.
10.1109/TMTT.2007.896794
Web of Science® Google Scholar
13 A. Walker,M. Steer, and K. Gard, Capturing asymmetry in distortion of an RF system using a multislice behavioral model. IEEE Microwave Wireless Comp Lett 16( 2006), 212–214.
10.1109/LMWC.2006.872114
Web of Science® Google Scholar

Citing Literature

All articles

Characterization of SNDR degradation in nonlinear wireless transmitters

Abstract

REFERENCES

Citing Literature

References

Information

About Wiley Online Library

Help & Support

Opportunities

Connect with Wiley

Characterization of SNDR degradation in nonlinear wireless transmitters

Abstract

REFERENCES

Citing Literature

References

Related

Information