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• W2069086502 startingPage "975" @default.
• W2069086502 abstract "This paper presents a digital predistorter with a wideband memory effect compensator for a Doherty power amplifier (PA). A simple memory-predistortion model, which consists of a look-up-table (LUT) and an adaptive filter equalizing memory effects, and a new memory effect estimation algorithm using a direct-learning architecture are proposed. The proposed estimation algorithm has an advantage that a transfer function of a feedback circuit does not affect the learning process. The predistorter is implemented in a field programmable gate array (FPGA) and a digital signal processor (DSP). The transmitter has achieved distortion level of -50.8dBr at signal bandwidth away from the carrier, and PA module efficiency of 24% with output power of 43dBm at 2595MHz under a 20MHz-bandwidth orthogonal frequency division multiplexing (OFDM) signal using laterally diffused metal oxide semiconductor (LDMOS) FETs." @default.
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• W2069086502 date "2010-01-01" @default.
• W2069086502 modified "2023-09-27" @default.
• W2069086502 title "A Wideband Digital Predistorter for a Doherty Power Amplifier Using a Direct Learning Memory Effect Filter" @default.
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• W2069086502 doi "https://doi.org/10.1587/transele.e93.c.975" @default.
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