Results 111 to 120 of about 164 (124)

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

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.
Seyed Aidin Bassam, Mohamed Helaoui, Fadhel M Ghannouchi   +2 more
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

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

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

Multi-Band Complexity-Reduced Generalized-Memory-Polynomial Power-Amplifier Digital Predistortion

IEEE Transactions on Microwave Theory and Techniques, 2016
Farouk Mkadem, Slim Boumaiza
exaly  

Band-Limited Volterra Series-Based Digital Predistortion for Wideband RF Power Amplifiers

IEEE Transactions on Microwave Theory and Techniques, 2012
Chao Yu, Lei Guan, Anding Zhu
exaly