IEEE Access, 2019 The method of function approximation to improve index accuracy of the lookup table (LUT) of digital predistortion (DPD) is proposed in this paper. The algorithm utilizes Taylor Series method for LUT approximation.
Jijun Ren
doaj +1 more source
Digital predistortion of 75–110 GHz W-band frequency multiplier for fiber wireless short range access systems [PDF]
, 2011 We present a W-band fiber-wireless transmission system based on a nonlinear frequency multiplier for high-speed wireless short range access applications.
Deng, Lei +6 more
core +5 more sources
Feedback Quantization in Crosscorrelation Predistorters [PDF]
, 2005 Amplification of signals with fluctuating envelopes inevitably leads to distortion because of nonlinear behavior of the power amplifier (PA). Digital predistortion can counteract these nonlinear effects.
Kokkeler, Andre B.J.
core +2 more sources
Hybrid Digital/Analog Predistorter Architecture With Enhanced Robustness to Hardware Impairments
IEEE AccessIn this paper, a hybrid predistortion architecture that allies the benefits of digital and analog predistortion techniques is investigated. This Hybrid Digital/Analog Predistorter (H-DAPD) uses a low order memory polynomial as a baseband digital ...
Majid Ahmed, Oualid Hammi
doaj +1 more source
A Digital Predistortion Maker With Adaptation Characteristic [PDF]
Journal of Intelligent Procedures in Electrical Technology, 2011 In this paper we study a technique of power RF amplifier linearization predistortion digital circuits and propose a method for adapting this circuit and compare the advantages and disadvantages of this circuit with conventional predistortion circuit. The
Mohammad Reza Soltani +3 more
doaj
A Digital Predistortion Scheme Exploiting Degrees-of-Freedom for Massive MIMO Systems
, 2018 The primary source of nonlinear distortion in wireless transmitters is the power amplifier (PA). Conventional digital predistortion (DPD) schemes use high-order polynomials to accurately approximate and compensate for the nonlinearity of the PA.
Marojevic, Vuk +4 more
core +1 more source
Effect of the Base-band Measurement Setup Errors on DPD Performance and Elimination Procedure
Advanced Electromagnetics, 2017 In this study, the effect of base-band measurement setup errors on DPD performance was investigated and a calibration procedure is developed to eliminate the measurement errors. A base-band measurement setup is prepared at laboratory with instruments and
A. H. Yüzer, E. B. Şanlı
doaj +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 +5 more
doaj +1 more source
Mixer linearisation for software defined radio applications [PDF]
, 2002 The inherent non-linearity of mixers is particularly acute in broadband receiver design for software defined radio (SDR) applications. Here, the receiver frontend ‘sees’ not only the wanted channel, but also a number of nearby signals.
Beach, MA +3 more
core +2 more sources
Research of compressed sensing for predistortion with relatively low sampling frequency
Tongxin xuebao, 2016 In order to improve the TWTA digital predistortion linearizer with relatively low sampling frequency, the LUT and indirect learning architecture were used, which was cumbersome.
Xin HU +6 more
doaj +2 more sources