Name
Title | ||
|---|---|---|
FFT-Based Limited Subband Digital Predistortion Technique for Ultra Wideband 5G Systems |
Abstract | ||
|---|---|---|
Parallel subband digital predistortion (DPD) has emerged as a promising approach for linearizing power amplifiers (PA) in wireless communication systems. This solution has the advantage of relaxing the bandwidth constraints on the feedback path analog to digital converter (ADC) which digitizes the PA distorted output which may spread over several hundreds MHz in the latest generations of mobile communications. However, the subband approach still has some limitations such as signal reconstruction and subband aliasing which limits its implementation on a wide scale. In this paper, an FFT-Based DPD technique that enables to compute the predistorter without interpolating signals is presented. Thanks to the frequency domain approach, the subband signals can be combined easily to compute the fullband predistorter directly. Moreover, the proposed technique offers the possibility of selecting specific frequency bins for the computation. In particular, the subband edges can be ignored which will result in relaxed bandwidth constraints and selectivity for the subband ADCs. Simulations show that the proposed FFT based subband DPD performs as good as the conventional time domain least-square approach even while excluding up to 13% of the FFT bins at the band edges. |
Year | DOI | Venue |
|---|---|---|
2018 | 10.1109/NEWCAS.2018.8585582 | 2018 16th IEEE International New Circuits and Systems Conference (NEWCAS) |
Keywords | Field | DocType |
frequency domain approach,subband signals,fullband predistorter,subband edges,relaxed bandwidth constraints,FFT based subband DPD,conventional time domain least-square approach,FFT bins,FFT-based limited subband digital predistortion technique,ultra wideband 5G systems,parallel subband digital predistortion,power amplifiers,wireless communication systems,feedback path analog,digital converter,PA distorted output,mobile communications,subband approach,signal reconstruction,subband aliasing,interpolating signals,FFT-based DPD technique,subband ADC | Time domain,Frequency domain,Computer science,Electronic engineering,Analog-to-digital converter,Bandwidth (signal processing),Aliasing,Fast Fourier transform,Predistortion,Signal reconstruction | Conference |
ISSN | ISBN | Citations |
2472-467X | 978-1-5386-4860-5 | 0 |
PageRank | References | Authors |
0.34 | 0 | 6 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| dangkien germain pham | 1 | 0 | 1.69 |
| Ghyslain Gagnon | 2 | 67 | 11.40 |
| Francois Gagnon | 3 | 131 | 33.07 |
| Georges Kaddoum | 4 | 874 | 94.42 |
| Chadi Jabbour | 5 | 29 | 10.63 |
| Patricia Desgreys | 6 | 30 | 9.27 |