Continuous-time adaptive control applied to rf amplifier linearization
Visualitza/Obre
Cita com:
hdl:2117/104507
Tipus de documentText en actes de congrés
Data publicació1994
EditorO.YUKSEL IEEE
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
A new approach to the RF power amplifier linearization problem is presented. The proposed solution applies non-linear theories (Lyapunov direct method) to adaptive filtering in order to improve the linearity of the RF amplifiers. The obtained design requires lower circuit complexity than the LINC amplifier, and is not based on iterative algorithms nor sub-system identification. Up to 100 MHz these functions could be implemented, at present, with operational amplifiers and integrated analog multipliers (four quadrants). The adjusting algorithm convergence or the interruption of the communication are not problems in the proposed adaptive solution. The canceller structure design is based on model reference adaptive systems (MRAS): to cancel the error between the plant output (distortion output of the RF amplifier) and reference model (the desired signal obtained from a linear and low-power amplifier) by using continuous-time techniques. The proposed structure is studied by computer simulation (SPICE program) in a class-A RF power amplifier, The behaviour of the adapted amplifier is studied when power transistors approach nonlinear operating zones (saturation state).
CitacióBertran, E., Montoro, G., Talavera, N. Continuous-time adaptive control applied to rf amplifier linearization. A: Mediterranean Electrotechnical Conference. "?". Antalya: O.YUKSEL IEEE, 1994, p. 160-163.
ISBN0780317726
Versió de l'editorhttp://ieeexplore.ieee.org/document/381119/
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
00381119.pdf | 282,7Kb | Visualitza/Obre |