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Advanced Search Results For "POWER amplifiers"

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 "POWER amplifiers"
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A Novel Autoregressive Spectral Estimation-Based Neural Network Crest Factor Reduction Structure in Power Amplifiers of 5G Systems in Sandstorm Environment.

Publication Type:Academic Journal

Source(s):Scientific Programming. 5/10/2022, p1-9. 9p.

Abstract:In this paper, an autoregressive spectral estimation using a multilayered neural network is proposed to reduce the nonlinearities of 5G MIMO power amplifiers and increase the signal-transmitting qualities. The proposed method adopts the two-sided doubl...

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Effect of Power Amplifier Distortion on the Speech Transmission Index for Public Address Systems.

Publication Type:Academic Journal

Source(s):Archives of Acoustics. 2022, Vol. 47 Issue 2, p191-199. 9p.

Abstract:The effect of the power amplifier on speech intelligibility in public address systems is often marginalised - i.e. it is assumed that it does not introduce significant signal distortion. This approach is justified when the linear range of the amplifier...

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Low-Complexity Digital Predistortion of Concurrent Multiband RF Power Amplifiers.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Microwave Theory & Techniques. Sep2022, Vol. 70 Issue 9, p4308-4317. 10p.

Abstract:The complexity of digital predistortion (DPD) for the concurrent multiband (MB) power amplifier (PA) has been a bottleneck for 5G wireless communication. A low-complexity MB DPD model has been proposed to reduce the running time complexity of DPD model...

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A Sparse-Bayesian Approach for the Design of Robust Digital Predistorters Under Power-Varying Operation.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Microwave Theory & Techniques. Sep2022, Vol. 70 Issue 9, p4218-4230. 13p.

Abstract:In this article, a sparse-Bayesian treatment is proposed to solve the crucial questions posed by power amplifier (PA) and digital predistorter (DPD) modeling. To learn a model, the advanced Bayesian framework includes a group of specific processes that...

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Massive MIMO Hybrid Precoding for LEO Satellite Communications With Twin-Resolution Phase Shifters and Nonlinear Power Amplifiers.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Communications. Aug2022, Vol. 70 Issue 8, p5543-5557. 15p.

Abstract:The massive multiple-input multiple-output (MIMO) transmission technology has recently attracted much attention in the non-geostationary, e.g., low earth orbit (LEO) satellite communication (SATCOM) systems since it can significantly improve the energy...

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Design and Optimization of 2.1 mW ULP Doherty Power Amplifier with Interstage Capacitances Using 65 nm CMOS Technology.

Publication Type:Academic Journal

Source(s):Mathematical Problems in Engineering. 11/19/2021, p1-12. 12p.

Abstract:This research proposed the design and calculations of ultra-low power (ULP) Doherty power amplifier (PA) using 65 nm CMOS technology. Both the main and the peaking amplifiers are designed and optimized using equivalent lumped parameters and power combi...

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A 24–28-GHz GaN MMIC Synchronous Doherty Power Amplifier With Enhanced Load Modulation for 5G mm-Wave Applications.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Microwave Theory & Techniques. Aug2022, Vol. 70 Issue 8, p3910-3922. 13p.

Abstract:In this article, a load-modulation enhanced wideband compact high-efficiency millimeter-wave (mm-wave) gallium nitride (GaN) monolithic microwave integrated circuit (MMIC) synchronous Doherty power amplifier (DPA) is presented. A synchronous DPA archit...

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Optimization of Coil Element Configurations Based on Matrix Gradient Coil.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Magnetics. Aug2022, Vol. 58 Issue 8, p1-7. 7p.

Abstract:Matrix gradient coils (also named multi-coils or arrays) have been introduced for magnetic resonance imaging (MRI) and shimming with amount of coil elements. However, equipping each coil element with a power amplifier is not always convenient because o...

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Resolution Improvement in a High-Power Magnetic Resonance Imaging Gradient Power Amplifier.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Power Electronics. Sep2022, Vol. 37 Issue 9, p10594-10608. 15p.

Abstract:High-resolution gradient power amplifiers are required to generate high-fidelity gradient fields in magnetic resonance imaging (MRI) systems. Various aspects of gradient power amplifiers have been the subject of research in the past years, however, sys...

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High-Precision Control Method for High-Power MRI Gradient Power Amplifiers.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Power Electronics. Aug2022, Vol. 37 Issue 8, p9035-9046. 12p.

Abstract:In magnetic resonance imaging (MRI), high-power gradient power amplifiers (GPAs) are required to drive the gradient coils to generate strong and high-fidelity gradient fields. High precision is an essential requirement for the GPAs since precision dire...

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