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J Electromagn Eng Sci > Volume 8(1); 2008 > Article
Journal of the Korean Institute of Electromagnetic and Science 2008;8(1):17-22.
DOI: https://doi.org/10.5515/JKIEES.2008.8.1.017   
Arbitrary Sampling Method for Nonlinearity Identification of Frequency Multipliers
Young-Cheol Park1, Hoi-Jin Yoon2
1Dept. of Electronics Engineering, Hankuk University of Foreign Studies
2Dept. of Computer Engineering, Hyupsung University
It is presented that sampling rates for behavioral modeling of quasi-memory less nonlinear devices can be far less than the Nyquist rate of the input signal. Although it has been believed that the sampling rate of nonlinear device modeling should be at least the Nyquist rate of the output signal, this paper suggests that far less than the Nyquist rate of the input signal can be applied to the modeling of quasi-memoryless nonlinear devices, such as frequency multipliers. To verify, a QPSK signal at 820 MHz were applied to a frequency tripler, whereby the device can be utilized as an up-converting mixer into 2.46 GHz with the aid of digital predistortion. AM-AM, AM-PM and PM-PM can be successfully measured regardless of sampling rates.
Key words: Frequency Multipliers, Sampling Rate, Nonlinearity Identification, Pre-Distortion
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