Results 11 to 20 of about 1,347 (153)
Neural Network-Assisted DPD of Wideband PA Nonlinearity for Sub-Nyquist Sampling Systems [PDF]
SensorsThe design of conventional digital predistortion (DPD) requires an analogue-to-digital converter (ADC) with a sampling frequency that is multiple times the signal bandwidth, which is extremely challenging for sub-Nyquist sampling systems with ...
Mengqiu Liu +6 more
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Comparison of Feature Selection Techniques for Power Amplifier Behavioral Modeling and Digital Predistortion Linearization [PDF]
Sensors, 2021 The power amplifier (PA) is the most critical subsystem in terms of linearity and power efficiency. Digital predistortion (DPD) is commonly used to mitigate nonlinearities while the PA operates at levels close to saturation, where the device presents its
Abdoul Barry +3 more
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Upgrading Behavioral Models for the Design of Digital Predistorters [PDF]
Sensors, 2021 This work presents a strategy to upgrade models for power amplifier (PA) behavioral modeling and digital predistortion (DPD). These incomplete structures are the consequence of nonlinear order and memory depth model truncation with the purpose of ...
Carlos Crespo-Cadenas +2 more
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Discontinuity Characterization and Low-Complexity Smoothing in RF-PA Polynomial Piecewise Modeling [PDF]
SensorsPiecewise modeling of power amplifiers (PAs) typically involves assembling different polynomials to capture nonlinear behavior across different operating regions.
Carolina Pedrosa +5 more
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IEEE Microwave and Wireless Technology LettersDigital Pre-Distortion (DPD) enhances signal quality in wideband RF power amplifiers (PAs). As signal bandwidths expand in modern radio systems, DPD's energy consumption increasingly impacts overall system efficiency. Deep Neural Networks (DNNs) offer promising advancements in DPD, yet their high complexity hinders their practical deployment.
Yizhuo Wu +7 more
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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
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Efficient Digital Predistortion Using Sparse Neural Network
IEEE Access, 2020 This paper proposes an efficient neural-network-based digital predistortion (DPD), named as envelope time-delay neural network (ETDNN) DPD. The method complies with the physical characteristics of radio-frequency (RF) power amplifiers (PAs) and uses a ...
Masaaki Tanio +2 more
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IEEE Access, 2020 For higher data throughput, the Massive Multi-input Multi-output (MIMO) system has been widely used in modern communication systems. Due to the circuit size and power consumption, it is difficult to integrate one Radio Frequency (RF) chain for each power
Caoyu Li +4 more
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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 +5 more
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IET Science, Measurement & Technology, 2021 The noise is an inherent part of a transceiver system, which becomes more severe on low‐cost systems. The power amplifier (PA) further enhances this noise and the signal to be propagated to the receiver. The conventional approach of digital predistortion
Girish Chandra Tripathi, Meenakshi Rawat
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