Title :
A model for bandpass nonlinearities based on harmonic measurements
Author :
Behravan, Ali ; Eriksson, Thomas
Author_Institution :
Dept. of Signals & Syst., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
This paper presents a model for a bandpass nonlinearity, which is based on measurements on several harmonics of the output. The model has a quadrature structure, with a memoryless nonlinearity and a filter in each branch. The structure can describe AM/AM as well as AM/PM conversions. The parameters of the nonlinearity and the filter are jointly optimized to fit the measurements. Analytic expressions for the parameters of the model are found by means of the MMSE optimization. The method is applied to find a model for a 60 GHz solid-state power amplifier based on a set of measurements of different harmonics of the output.
Keywords :
amplitude modulation; band-pass filters; harmonics; least mean squares methods; millimetre wave power amplifiers; optimisation; pulse modulation; 60 GHz; MMSE optimization; bandpass nonlinearities; filter nonlinearity; harmonic measurements; memoryless nonlinearity; quadrature structure; solid-state power amplifier; Bandwidth; Context modeling; Degradation; Frequency; High power amplifiers; Nonlinear filters; Power harmonic filters; Power system modeling; Solid modeling; Voltage;
Conference_Titel :
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings
Print_ISBN :
0-7803-7829-6
DOI :
10.1109/RAWCON.2003.1227979
