Results 31 to 40 of about 4,686 (214)
Digitally Assisted Harmonic Cancellation for Multi-Octave Filter-Less Transmitter
IEEE Access, 2020 This paper presents and demonstrates the design of a filter-less transmitter architecture with digitally assisted harmonic cancellation. A neural network is used to model the harmonics as well as IMD for digital predistortion applications.
Hemant Kumar Singhal, Karun Rawat
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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 of Internally Bandlimited Multistage Cubic-Term Generators for RF Receivers [PDF]
, 2009 Adaptive feedforward error cancellation applied to correct distortion arising from third-order nonlinearities in RF receivers requires low-noise low-power reference cubic nonidealities.
Hajimiri, Ali, Keehr, Edward A.
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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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Theoretical Investigation of Digital Predistortion System [PDF]
Advances in Computer Science Research, 2015 Some doubt has been cast upon the predistortion system applying indirect learning structure (IDLS). In this paper, using the polynomial model for the predistorter (PD), theoretical investigation and simulation on the predistortion system performance basing on IDLS is put out.
Xiaoxu Qu, Jingyi Lou
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Time-Domain Predistortion Method Based on Raised Cosine Signaling in Real Transmission Channels
Active and Passive Electronic Components, 2012 The concept of time-domain predistortion method based on raised cosine signaling is applied in real transmission channels. The proposed PWM-RC method uses raised-cosine pulse shaping instead of conventional rectangular digital signals and pulse-width ...
Bretislav Sevcik
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Linearization Technologies for Broadband Radio-Over-Fiber Transmission Systems
Photonics, 2014 Linearization technologies that can be used for linearizing RoF transmission are reviewed. Three main linearization methods, i.e. electrical analog linearization, optical linearization, and electrical digital linearization are presented and compared ...
Xiupu Zhang +3 more
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Sparse Flexible Reduced-Volterra Model for Power Amplifier Digital Pre-Distortion
IEEE Access, 2022 The Volterra framework plays an important role in digital pre-distortion (DPD) for power amplifier (PA) linearization. In practice, the full-Volterra (FV) model is avoided due to the so-called curse of dimensionality, which has motivated several Volterra
Cyro S. Hemsi, Cristiano M. Panazio
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Improving the Spectral Efficiency of Nonlinear Satellite Systems through Time-Frequency Packing and Advanced Processing [PDF]
, 2013 We consider realistic satellite communications systems for broadband and broadcasting applications, based on frequency-division-multiplexed linear modulations, where spectral efficiency is one of the main figures of merit.
Amina Piemontese +4 more
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Tongxin xuebao, 2012 In order to keep the adaptive digital predistortion algorithms valid,usually the output power level of the TWTA must be reduced,which corresponded a reduced efficiency of the TWTA.A predistortion technique was proposed by combining RF predistortion ...
Xin HU +3 more
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