Results 21 to 30 of about 35,890,141 (157)

Attention mechanism based bidirectional LSTM model for broadband power amplifier linearization

Electronics Letters, Volume 59, Issue 14, July 2023., 2023
In this letter, a novel model for broadband power amplifier (PA) linearization is proposed, namely Attention Mechanism based Bidirectional Long Short‐term Memory network (AM‐BiLSTM). In order to verify the linearization performance of the AM‐BiLSTM model, a 100 MHz bandwidth 5G new radio (5G NR) signal is employed to test the sub‐6G PA operating at 2.6‐
Rina Su, Jiacheng Wang, Gaoming Xu, Taijun Liu   +3 more
wiley   +1 more source

Doherty power amplifier with simplified out‐of‐phase power splitter for 5G applications

Electronics Letters, Volume 59, Issue 13, July 2023., 2023
Abstract This letter presents the architecture and characterization of a Doherty power amplifier (DPA) with a simplified out‐of‐phase power splitter (SOPPS) for fifth‐generation (5G) small‐cell applications. The proposed SOPPS consists of two passive components, which is conducive to chip miniaturization.
Jianqiang Chen, Zhihao Zhang, Jiajin Li, Yuhan Guan, Weilong Tang, Gary Zhang   +5 more
wiley   +1 more source

A Dual‐Band Dual‐Output Filtering Power Amplifier Based on High‐Selectivity Filtering Impedance Transformer

International Journal of RF and Microwave Computer-Aided Engineering, Volume 2023, Issue 1, 2023., 2023
In this brief, a novel filtering impedance transformer with good selectivity and high termination impedance is proposed, of which close‐formed design equations are derived and effectively verified. Then, a dual‐band dual‐output filtering power amplifier (PA) operating at 2.4‐2.6 GHz and 3.4‐3.6 GHz is designed based on the proposed filtering impedance ...
Shuchen Zhen, Yongle Wu, Shaobo Li, Zhuoyin Chen, Weimin Wang, YongChae Jeong   +5 more
wiley   +1 more source

A Novel Digital Predistortion Identification Algorithm Based on Variable Forgetting Factor Recursive Least Square Method

International Journal of RF and Microwave Computer-Aided Engineering, Volume 2023, Issue 1, 2023., 2023
The transmitting signal of wireless communication system is impaired by the nonlinearity of RF power amplifier (PA) which leads to signal distortion and spectrum spillover, by which the signal transmission quality is affected. Digital predistortion (DPD) is an efficient and economical way to correct the nonlinear effects of power amplifiers.
Wenxian Song, Guofu Wang, Jincai Ye, Arpan Desai   +3 more
wiley   +1 more source

Analysis and Digital Predistortion of in-Band Cross Modulation in Concurrent Multi-Band Transmitters

IEEE Access, 2022
In multiband transmitters where two or more radios share the same power amplifier (PA), interferences can usually be kept below an acceptable level with the help of multi-band digital predistortion (DPD) techniques.
Yunsik Hahn, Jose I. Martinez-Lopez, Patrick Roblin, Ruwaybih Alsulami, Zoya Popovic, Vanessa Chen   +5 more
doaj   +1 more source

Practical Demonstration of 5G NR Transport Over-Fiber System with Convolutional Neural Network

Telecom, 2022
This study describes an experimental realization using digital predistortion (DPD) for a fifth generation (5G) multiband new radio (NR) optical front haul (OFH) based Radio over Fiber (RoF) link.
Muhammad Usman Hadi
doaj   +1 more source

Design and optimisation of high‐efficient class‐F ULP‐PA using envelope tracking supply bias control for long‐range low power wireless local area network IEEE 802.11ah standard using 65 nm CMOS technology

IET Circuits, Devices &Systems, Volume 16, Issue 7, Page 553-568, October 2022., 2022
Abstract This article presents the design and optimisation of a sub‐1 GHz class‐F ultra‐low power (ULP) power amplifier (PA) in 65 nm Complementary Metal Oxide Semiconductor (CMOS) technology. An envelope tracking (ET) supply biasing technique is adopted to improve the efficiency of class‐F PA.
Muhammad Ovais Akhter, Najam Muhammad Amin, Razia Zia   +2 more
wiley   +1 more source

Digital Predistortion of Millimeter-Wave Hybrid Beamforming Transmitters Using Observation Receivers With Low-Bit Resolution Analog-to-Digital Converter

IEEE Access, 2021
This paper proposes a new digital predistortion (DPD) scheme for linearizing millimeter-wave hybrid beamforming transmitters using observation receivers with low-bit resolution analog-to-digital converters (ADCs).
Ahmed Ben Ayed, Eric Ng, Patrick Mitran, Slim Boumaiza   +3 more
doaj   +1 more source

Performance of digital predistorter in system with analogue to digital converter

IET Communications, Volume 16, Issue 16, Page 1875-1888, October 2022., 2022
Abstract The baseband digital pre‐distortion (DPD) signal processing technique is the most cost‐effective linearisation method among other techniques to address the nonlinearity effect of the power amplifier. For communication systems containing DPD and power amplifier, it is difficult to acquire performance metrics closed‐forms for any DPD ...
Ramez Moh. Elaskary, Ahmed Hesham Mehana, Yasmine Fahmy, Mona El‐Ghoneimy   +3 more
wiley   +1 more source

Physics Informed Spiking Neural Networks: Application to Digital Predistortion for Power Amplifier Linearization

IEEE Access, 2023
Recently, new emerging techniques of neuromorphic hardware render spiking neuron networks (SNN) promising as an energy-efficient solution for artificial intelligence (AI).
Siqi Wang, Pietro Maris Ferreira, Aziz Benlarbi-Delai   +2 more
doaj   +1 more source