Improved baseband digital predistortion for linearising PAs with nonlinear memory effects using linearly interpolated LUT. Issue 22 (1st October 2013)

• Record Type: Journal Article
• Authors: Feng, X.; Feuvrie, B.; Descamps, A.S.; Wang, Y.
• Is Part Of: Electronics letters. Volume 49:Issue 22(2013)
• Page Start: 1389
• Page End: 1391
• Publication Date: 2013-10-01
• Subjects: benchmark testing -- circuit testing -- computational complexity -- interpolation -- polynomials -- power amplifiers -- quadrature amplitude modulation -- table lookup; nonlinear memory effect -- LUT -- DPD -- improved baseband digital predistortion solution -- power amplifier -- memory polynomial model -- MP model -- look‐up table -- linear interpolation technique -- computational complexity -- bench testing -- PA ZFL‐2500 -- 16QAM modulated signal; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2013.2458
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : An improved baseband digital predistortion (DPD) solution to reduce the nonlinearity of power amplifiers (PAs) with memory effects is proposed. It is based on the memory polynomial (MP) model and linearly interpolated look‐up table (LUT). This predistorter reduces significantly the computational time needed in MP based DPD by using a LUT. A linear interpolation technique is introduced to enhance the indexing of the LUT, such that good performance with small table size and low computational complexity is achieved. The proposed solution is validated on a test bench by using a PA ZFL‐2500 driven by a 16QAM modulated signal.