OFDM系统中记忆非线性放大器的高效预失真技术

Abstract

Abstract:

A new structure based on the Filter Look-Up Table(FLUT) structure is proposed for solving the problem of frequency-selective nonlinear distortion of the power amplifier in a wideband OFDM system. A new predistorter which uses the 2-dimensional Look-Up Table method is added in the frequency domain to compensate the distortion more accurately. Simulation result indicates that the system performance and the accuracy of convergence can be improved, and that the rate of convergence can be increased by 50％ compared to the original FLUT structure.

Key words: orthogonal frequency division multiplexed, memory, predistort, filter look-up table

CLC Number:

TN919

REN Zhi-yuan;ZHANG Hai-lin. Filter lookup table with a frequency predistorter structure for the memory nonlinear power amplifier in the OFDM system[J].J4, 2009, 36(5): 777-781.

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Filter lookup table with a frequency predistorter structure for the memory nonlinear power amplifier in the OFDM system

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