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- W1551719207 abstract "RF power amplifiers in mobile WiMAX transceivers operate in an inherently nonlinear manner. It is possible to amplify the signal in the linear region, and avoid distortion, using output power back-off; however, this approach may suffer significant reduction in efficiency and power output. This paper investigates the use of Doherty techniques instead of back-off, to simultaneously achieve good efficiency and acceptable linearity. A 3.5 GHz Doherty RFPA has been designed and optimized using a large signal model simulation of the active device, and performance analysis under different drive levels. However, the Doherty EVM is generally poor for mobile WiMAX. Linearity may be improved by further digital pre-distortion, and a simple pre-distortion method using forward and reverse AM-AM and AM-PM modeling. Measurements on the realized amplifier show that this approach satisfies the EVM requirements for WiMAX base stations. It exhibits a PAE over 60%, and increases the maximum linear output power to 43 dBm, whilst improving the EVM." @default.
- W1551719207 created "2016-06-24" @default.
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- W1551719207 date "2012-01-01" @default.
- W1551719207 modified "2023-09-25" @default.
- W1551719207 title "Optimum Design of Doherty RFPA for Mobile WiMAX Base Stations" @default.
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- W1551719207 doi "https://doi.org/10.1007/978-3-642-35155-6_59" @default.
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