Analysis on Memory Effects of Frequency Multipliers for the Frequency Translation of Complex Modulated Signals

Memory effects on frequency multipliers have been analyzed in this paper for the application of digital predistortion techniques. Although the memory effects are generally thought to exist in PAs since they handle high power signals and have bias networks, previous predistortion results showed that...

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Bibliographic Details
Published in2007 Asia-Pacific Microwave Conference pp. 1 - 4
Main Author Youngcheol Park
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2007
Subjects
Chirp modulation
Circuits
Digital modulation
Frequency conversion
Frequency measurement
Polynomials
Predistortion
Quadrature phase shift keying
Schottky diodes
Signal analysis
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Summary:Memory effects on frequency multipliers have been analyzed in this paper for the application of digital predistortion techniques. Although the memory effects are generally thought to exist in PAs since they handle high power signals and have bias networks, previous predistortion results showed that some amount of memory effects exist in frequency multipliers. The behavioral model of parallel cascade method was compared with the memoryless polynomial model. A frequency tripler with back-to-back Schottky diodes was implemented, and a QPSK test vector was generated at 820 MHz to capture higher-than- third order nonlinearities at 2.46 GHz. As a result, the parallel cascade model shows that the modeling accuracy can be improved by more than 4 dB in error function defined hereafter. In addition, the error function represents that the frequency tripler has memory effects concentrated up to 18 ~ 30 kHz.
ISBN:9781424407484
1424407486
ISSN:2165-4727
2165-4743
DOI:10.1109/APMC.2007.4555041