Results 11 to 20 of about 35,253,731 (205)
Effect on the linearity improvement of TWTA by combining RF predistortion linearizer and digital predistortion algorithm [PDF]
Tongxin xuebao, 2012 In order to keep the adaptive digital predistortion algorithms valid,usually the output power level of the TWTA must be reduced,which corresponded a reduced efficiency of the TWTA.A predistortion technique was proposed by combining RF predistortion ...
Xin HU +3 more
doaj +3 more sources
A Digital Predistortion Maker With Adaptation Characteristic [PDF]
Journal of Intelligent Procedures in Electrical Technology, 2011 In this paper we study a technique of power RF amplifier linearization predistortion digital circuits and propose a method for adapting this circuit and compare the advantages and disadvantages of this circuit with conventional predistortion circuit. The
Mohammad Reza Soltani +3 more
doaj +1 more source
Linearization techniques to suppress optical nonlinearity [PDF]
, 2009 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This thesis is shown the implementation of the linearization techniques such as feedforward and pre-distortion feedback linearization to suppress the ...
Tabatabai, Farbod
core +7 more sources
Comparison of single- and double-sided pulse width modulated signals with non-linear predistortion [PDF]
, 2012 Class D amplifiers are based on a low-bit pulse width modulated (PWM) signal reconstructed through the lowpass characteristic of the loudspeaker. To create a PWM signal, a non-linear conversion from a standard pulse code modulated (PCM) signal has to be ...
Weiss, Stephan +3 more
core +4 more sources
Digital Predistortion in High Throughput Satellites: Architectures and Performance
IEEE Access, 2021 The future of satellites lies in the deployment of high throughput satellites (HTS). Moreover, HTS will also play an important role in the up coming 5G mobile networks where HTS will provide services like disaster relief, remote automation, maritime ...
Ovais Bin Usman, Andreas Knopp
doaj +1 more source
Optimized MSA DPD method for improving 5G multiband optical fronthaul performance
Microwave and Optical Technology Letters, Volume 65, Issue 12, Page 3326-3332, December 2023., 2023 Abstract A modified optimized magnitude‐selective affine (OMSA) model‐based digital predistortion (DPD) is presented that introduces the weighting function into our earlier proposed magnitude‐selective affine (MSA) method with an aim to further reduce the complexity overheads without affecting performance compared to the MSA method. This model utilizes
Muhammad Usman Hadi +2 more
wiley +1 more source
Experimental demonstration of digital predistortion for orthogonal frequency-division multiplexing-radio over fibre links near laser resonance [PDF]
, 2015 Radio over fibre (RoF), an enabling technology for distribution of wireless broadband service signals through analogue optical links, suffers from non-linear distortion. Digital predistortion has been demonstrated as an effective approach to overcome the
Vieira, Luis Carlos, Gomes, Nathan J.
core +1 more source
IET Optoelectronics, Volume 17, Issue 4, Page 139-148, August 2023., 2023 The accuracy of the generalised memory polynomial (GMP) for the non‐linear modelling of optical Fast‐OFDM links is studied. The GMP is used for performance investigations of a distortion compensation approach to IM/DD Fast‐OFDM. Excellent BER improvements are achieved using the proposed compensation scheme, for up to 16PAM modulation and 256 Fast‐OFDM ...
Luis Carlos Vieira +3 more
wiley +1 more source
Wiener predistorter for nonlinear satellite downlinks
International Journal of Satellite Communications and Networking, Volume 41, Issue 4, Page 392-405, July/August 2023., 2023 The nonlinear power amplifier and the analogue output channel filter add distortions to the satellite‐transmitted signal. Wiener predistorter is an effective method to deal with such signal distortions. In this work, we show that fully compensating for the channel filter group‐delay distortion degrades the performance of the Wiener predistortion system.
Azam Mehboob +3 more
wiley +1 more source
Digital Predistortion Utilizing Over-the-Air Feedback for Phased Arrays
IEEE Access, 2021 In this paper, an efficient digital predistortion (DPD) architecture utilizing over-the-air (OTA) feedback is presented to linearize phased array transmitters.
Ying Liu +5 more
doaj +1 more source