Results 131 to 140 of about 35,890,141 (157)

A fully integrated harmonic injection and envelope-tracking architecture to extend the linearity of RF power amplifiers under high PAPR. [PDF]

Sci Rep
Ziraksaz F, Hassanzadeh A.
europepmc   +1 more source

A Two-Stage Time-Domain Equalization Method for Mitigating Nonlinear Distortion in Single-Carrier THz Communication Systems. [PDF]

Sensors (Basel)
Liu Y, Yang H, Liu Z, Jia M, Li S, Li J, He J, Yang Z, Zhang C.   +8 more
europepmc   +1 more source

Radio frequency interface quality assessment in 4G/5G: Effects of IQ imbalance, phase noise, and nonlinearities on error vector magnitude. [PDF]

PLoS One
Pyatin I, Boiko J, Kovtun V, Kovtun O.
europepmc   +1 more source

Investigation on the performance of photonics-aided W-band millimeter-wave wireless transmission. [PDF]

Heliyon
Tao L, Lu Q, Li R, Wang Z, Cheng T, Yu Y, Huang W.   +6 more
europepmc   +1 more source

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Pruning strategies for a Volterra series model used in digital predistortion (DPD) of RF power amplifiers

2017 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), 2017
Strategies for reducing the number of basis waveforms used in a Volterra series model for digital predistortion (DPD) of RF power amplifiers (PAs) are proposed. Simple DPD models are generalized so that elemental terms within the Volterra series are grouped together or pruned.
R Neil Braithwaite
exaly   +2 more sources

Closed-Loop Digital Predistortion (DPD) Using an Observation Path With Limited Bandwidth

IEEE Transactions on Microwave Theory and Techniques, 2015
This paper shows that digital predistortion (DPD) used to linearize an RF power amplifier (PA) can achieve wide bandwidth distortion cancellation using measurements obtained from a narrow bandwidth observation path. The DPD module creates a correction signal using a set of nonlinear basis waveforms, weighted by adjustable coefficients. The coefficients
R Neil Braithwaite
exaly   +2 more sources

Computationally efficient coefficient estimator used in memory-based digital predistortion (DPD) models

2016 87th ARFTG Microwave Measurement Conference (ARFTG), 2016
Computationally efficient estimation of digital predistortion (DPD) coefficients for memory polynomial, gain polynomial, and pruned Volterra series models is proposed. In all three cases, the basis waveforms within the estimator are specified in the frequency domain as a function of memoryless waveforms and delay operators, thereby reducing the number ...
R Neil Braithwaite
exaly   +2 more sources

2-D Digital Predistortion (2-D-DPD) Architecture for Concurrent Dual-Band Transmitters

IEEE Transactions on Microwave Theory and Techniques, 2011
This paper presents a novel 2-D digital-predistortion (2-D-DPD) technique that is applicable for linearization of concurrent dual-band transmitters. This technique uses a unique way for distortion compensation and linearization of dual-band transmitters by selecting, characterizing, and applying predistortion in each band separately.
Fadhel M. Ghannouchi, Mohamed Helaoui, Seyed Aidin Bassam   +2 more
exaly   +2 more sources

Implementing crest factor reduction (CFR) by offsetting digital predistortion (DPD) coefficients

2012 Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits, 2012
A combined approach to digital predistortion (DPD) and crest factor reduction (CFR) is proposed. The new CFR is structured similar to DPD and is implemented by introducing a steady-state offset into the DPD coefficients. The DPD and CFR coefficients are estimated using separate adaptive processes but applied to the transmission path in a common module.
exaly   +2 more sources

Examples of Linearity Improvement for Millimeter-Wave 5G Power Amplifiers Using Wideband Digital Predistortion (DPD)

2023 International Conference on Consumer Electronics - Taiwan (ICCE-Taiwan), 2023
Jerry Lopez, Clint Sweeney
exaly   +3 more sources