Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2008.07a
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- Pages.1391-1392
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- 2008
The Imperfection Feature Effects on the I/Q modulator in the RF transmitter
RF 송신부의 I/Q 변조기에서의 Imperfection 특성의 영향
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Park, Yong-Kuk
(KETI) ;
- Ko, Jae-Hyeong (Chung-Ang University) ;
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Won, Kwang-Ho
(KETI) ;
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Kim, Hyeong-Seok
(Chung-Ang University)
- Published : 2008.07.16
Abstract
The modulation quality of the I/Q modulator in a wireless transmitter usually affects system performance and it mostly depends on both a nonlinearity and a distortion, from the third order intermodulation(IM3) signal and the imperfection features such as an input amplitude error and a local phase error, respectively. This paper focused on how much the Single Sideband Ratio(SSR), which indicates the signal distortion, changes according to the variation of the imperfection features. Since a desired signal, side band and IM3 signals at the I/Q modulator output are also represented with those power series coefficients and the imperfection features, the effects of the imperfection features on SSR can be clearly analyzed.
Keywords