A low cost adaptive digital predistorter for linearization of power amplifiers in MIMO transmitters
نویسندگان
چکیده
منابع مشابه
FPGA Implementation of a Hammerstein Based Digital Predistorter for Linearizing RF Power Amplifiers with Memory Effects
Power amplifiers (PAs) are inherently nonlinear elements and digital predistortion is a highly cost-effective approach to linearize them. Although most existing architectures assume that the PA has a memoryless nonlinearity, memory effects of the PAs in many applications ,such as wideband code-division multiple access (WCDMA) or orthogonal frequency-division multiplexing (OFDM), can no longer b...
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In this paper we present and compare several methods of compensating the nonlinearity of the RF front-end of a wireless system. The baseband compensation techniques have gained more attentions due to the simplicity of DSP implementation and also utilizing adaptive algorithms. Two baseband compensation techniques, namely predistortion and postdistortion (equalization) of the baseband signal are ...
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An efficient adaptive predistortion technique is proposed to compensate linear or nonlinear distortions caused by a high-power amplifier (HPA) with memory in OFDM communication systems. Previous adaptive predistortion techniques, based on Volterra series, are not suitable for real-time implementation due to high computational burden and slow convergence rate. In the proposed approach, the memor...
متن کاملfpga implementation of a hammerstein based digital predistorter for linearizing rf power amplifiers with memory effects
power amplifiers (pas) are inherently nonlinear elements and digital predistortion is a highly cost-effective approach to linearize them. although most existing architectures assume that the pa has a memoryless nonlinearity, memory effects of the pas in many applications ,such as wideband code-division multiple access (wcdma) or orthogonal frequency-division multiplexing (ofdm), can no longer b...
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An adaptive linearization scheme based on the exact model-matching (EMM) approach is proposed to compensate nonlinearity of high power amplifiers (HPAs). It is illustrated that the input-output property of the broadband amplifier system can be approximated by a memory polynomial model (MPM). Then, the compensation of HPA input is determined from the MPM in a real-time manner, and consequently, ...
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ژورنال
عنوان ژورنال: IEICE Electronics Express
سال: 2012
ISSN: 1349-2543
DOI: 10.1587/elex.9.580