FPGA-based test bed for measurement of AM/AM and AM/PM distortion and modeling memory effects in RF PAs |
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| Affiliation: | 1. Instituto Politécnico Nacional, Centro de Investigación Y Desarrollo De Tecnología Digital (IPN-CITEDI), Av. del Parque 1310, Mesa de Otay, 22150 Tijuana, Baja California, Mexico;2. Department of Electronics and Telecommunications, Center for Scientific Research and Higher Education of Ensenada (CICESE), Carretera Ensenada-Tijuana No. 3918, Zona Playitas, C.P. 22860 Ensenada, B.C, Mexico;3. Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (IPN-CINVESTAV), Av. del Bosque 1145, Colonia el Bajío, Zapopan 45019, Jalisco, México;4. Institut des Nanotechnologies de Lyon (INL), UMR 5270 CNRS, Institut National des Sciences Appliquées de Lyon (INSA-Lyon), Bâtiment Blaise Pascal 7, Avenue Jean Capelle, 69621 Villeurbanne Cedex, France;5. Instituto Nacional de Astrofísica, Optica y Electrónica (INAOE), Luis Enrique Erro No. 1, Santa María Tonatzintla, San Andrés Cholula, 72840 Puebla, Mexico;1. Department of Electrical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran;2. Integrated Circuits and Electronics Laboratory (ICE-LAB), Department of Engineering, Aarhus University, Denmark;1. Department of Computer Science and Technology, Xinyang Normal University, Henan, China;2. Department of Computer Science and operational Research, Montreal University, Montreal, Canada |
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| Abstract: | Using a field-programmable gate array (FPGA) development board, a digital signal processor (DSP) builder, and the phase-to-amplitude conversion principle, a low-cost system for measuring the amplitude-to-amplitude (AM/AM) and amplitude-to-phase (AM/PM) distortion curves of radio frequency (RF) power amplifiers (PAs) is presented. The state of the art based on the measurements and preliminary studies of AM/AM and AM/PM distortion curves is discussed. A full digital control of the test bed simulated/emulated in Matlab/Simulink is introduced to recalculate the known AM/AM and AM/PM measurements stored as look-up table (LUT). Finally, the low-cost system comprises the memory polynomial model (MPM) that involves the nonlinearity order and memory effects of real PAs. |
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| Keywords: | AM/AM AM/PM Field-programmable gate arrays Memory modeling Memory polynomial model Power amplifier RF Test bed |
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