Liu Didi, Song Shuxiang, Wang Junyi. A method for adaptive linearization using analog pre-distortion[J]. 2015,(1):52-55. DOI: 10.13756/j.gtxyj.2015.01.017.
In view of the nonlinearity problems of RF power amplifiers
a two complex polynomials-based analog pre-distortion circuit is proposed in this paper
and the coefficients of these polynomials are adaptively optimized according to the response of the power amplifier using the LMS algorithms
resulting in the optimum linearity of the power amplifier.This pre-distorter is characterized in simple circuit
little computation and suitability for broadband communications.Furthermore
it is experimentally simulated and tested on the basis of dual-band and WCDMA signals.The results indicate that the pre-distortion linearization method is obviously effective to inhibiting Intermodulation(IM)distortion components and improves the Adjacent Channel Power Ratio(ACPR)to 56.1dB
well compensating the nonlinearity of the RF power amplifiers.
关键词
功率放大器模拟预失真线性化技术自适应控制多项式
Keywords
power amplifieranalog pre-distortionlinearization technologyadaptive controlpolynomial