학술논문
Volterra Series Model을 응용한 Nonlinear RF Power Amplifier의 Behavioral 모델링 기법 연구 / A Behavioral Modeling of Nonlinear RF Power Amplifiers Using Modified Volterra Series Models
Document Type
Dissertation/ Thesis
Author
Source
Subject
Language
Korean
Abstract
본 논문은 Nonlinear RF Power Amplifier의 Memory Effect를 고려한 Behavioral 모델링 방법론을 제안하였다. Volterra Series 방법론에 기반을 둔 여러 가지 간소화된 모델링 방법론과는 차별화된 방법론을 제시하였으며 Nonlinear Block과 Linear Block으로 나누어 설계하였다. Memory Effect를 고려하기 위하여 Linear Block에 Delay Tab을 이용하여 구현하였다. 모델링에 사용된 Power Amplifier는 GSM과 WCDMA용 두 가지이며 RFMD 사의 RF3159와 ANADIGICS 사의 AWT6282를 이용하였다. 모델링에 사용한 Data는 GSM Cellular 850 MHz Band, DCS 1800 MHz Band, PCS 1900 MHz Band, 그리고 WCDMA 1700 MHz Band에서 Signal Analyzer를 이용하여 측정한 Data를 기반으로 하였다. 모델링은 MATLAB 프로그램을 이 용하여 설계하였으며 Time-domain과 Frequency-domain에서 모델링 성능을 시뮬레이션 하였다. 제안된 Power Amplifier 모델링은 2 dB 내외의 오차로 시뮬레이션 되었다.
In this thesis, a behavior modeling method which is considered with memory effects of nonlinear RF power amplifiers is proposed. A modeling method distinguished from other simplified modeling methods based Volterra series is presented, which is designed with two blocks. One is the nonlinear block and the other is the linear block. To take into account memory effects, the linear block is designed by using delay taps. Power amplifiers modeled in this thesis are GSM and WCDMA which used RF3159 and AWT6282 manufactured by RFMD and ANADIGICS respectively. The data adopted in modeling is based on the collected data in GSM Cellular 850MHz Band, DCS 1800MHz Band, PCS 1900MHz Band and WCDMA 1700MHz Band measured by a signal analyzer. Modeling is designed with MATLAB program and simulated in Time-domain and Frequency-domain. The proposed model successively predicted the power amplifier behavior within about 2 dB accuracy.
In this thesis, a behavior modeling method which is considered with memory effects of nonlinear RF power amplifiers is proposed. A modeling method distinguished from other simplified modeling methods based Volterra series is presented, which is designed with two blocks. One is the nonlinear block and the other is the linear block. To take into account memory effects, the linear block is designed by using delay taps. Power amplifiers modeled in this thesis are GSM and WCDMA which used RF3159 and AWT6282 manufactured by RFMD and ANADIGICS respectively. The data adopted in modeling is based on the collected data in GSM Cellular 850MHz Band, DCS 1800MHz Band, PCS 1900MHz Band and WCDMA 1700MHz Band measured by a signal analyzer. Modeling is designed with MATLAB program and simulated in Time-domain and Frequency-domain. The proposed model successively predicted the power amplifier behavior within about 2 dB accuracy.