Digital predistortion
Adaptive digital predistortion linearisation for RF power amplifiers
... In order to simulate a digital predistortion scheme, a model of a typical PA must first be obtained. For the purposes of this research, a ZFL-2000 amplifier available from Mini Circuits was chosen. The ...
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Evolutionary Multiobjective Optimization for Adaptive Dataflow-based Digital Predistortion Architectures
... leakage. Digital Predistortion (DPD) is an effective technique to counteract these ...efficient predistortion across time- varying operational requirements and modulation ...
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Analysis on LUT based digital predistortion using direct learning architecture for linearizing power amplifiers
... and predistortion techniques. Among these techniques, predistortion technique, particularly base- band digital predistortion (DPD), has been widely studied thanks to its ability of ...
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A Robust Augmented Combination of Digital Predistortion and Crest Factor Reduction for RF Power Amplifiers
... Abstract—This paper proposes a robust combination of digital predistortion (DPD) and crest factor reduction (CFR) for radio frequency (RF) power amplifiers (PAs). It is constructed using the architecture of ...
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A Direct Learning Digital Predistortion Algorithm to Accurately Compensate for the Power Amplifier Nonlinearity
... [10] D. Morgan, Z. Ma, J. Kim, M. Zierdt, and J. Pastalan, Generalized memory polynomial model for digital predistortion of RF power amplifiers, IEEE Trans. Signal Process. (2006) 3852–3860. [11] C. ...
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Digital predistortion of power amplifiers using look up table method with memory effects for LTE wireless systems
... The digital predistortion (DPD)–PA cascade attempts to combine two nonlinear systems into one linear result which allows the PA to op- erate closer to ...
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Prototype Implementation of Two Efficient Low-Complexity Digital Predistortion Algorithms
... LUT-based digital PDs on DSP/FPGA hardware and validated on real PAs in measure- ment ...floating-point digital signal processor ...and digital predistortion are evaluated in a record-and- ...
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A New Accurate Volterra-Based Model for Behavioral Modeling and Digital Predistortion of RF Power Amplifiers
... Abstract—A new accurate Volterra-based model is introduced for behavioral modeling and digital predistortion (DPD) of power amplifiers (PAs). This model extends the GMP model with specific cross terms, and ...
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Power Amplifier Linearization Using Multi-Stage Digital Predistortion Based On Indirect Learning Architecture
... In this paper we propose a multi stage ILA for digital predistortion which is having less computational complexity for the parameter estimation, as compared with the conventional ILA approach. The ...
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Distortion Mitigation Using Digital Predistortion
... The predistortion circuit make inverse models the amplifier's gain and phase characteristics and, when combined with the amplifier, produces an overall system that is more linear and suppress the amplifier's ...
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Adaptive digital predistortion for wideband high crest factor applications based on the WACP optimization objective
... In Figure 14.3 (first stage testing), output power spectra prior to predistortion, after Initial Setting, after forced drift and after On-Air Adaption are presented for each target modulation. ACP, WACP and CCP ...
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Low complexity predistortion and equalization in nonlinear multicarrier satellite communications
... reduced-complexity digital predistortion (DPD) scheme at the transmitter and a corresponding equalizer (EQ) at the receiver to mitigate these nonlinear ...
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Power Amplifier Linearization Using Digiital Predistortion
... memoryless predistortion can achieve only very limited linearization performance ....Therefore, digital predistorters also need to have memory ...wideband digital predistortion ...
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Efficient Lookup Table-Based Adaptive Baseband Predistortion Architecture for Memoryless Nonlinearity
... cited. Digital predistortion is an effective means to compensate for the nonlinear effects of a memoryless ...a digital baseband predistorter can mitigate the undesirable nonlinear effects along the ...
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The Research and Application of Combining Lut and Memory Compensation for Twta Linearization with Relatively Low Sampling Frequency
... polynomial predistortion linearizer is not very good for TWTA ...polynomial predistortion linearizer valid, usually the output power level of the TWTA must be reduced, which corresponds to a reduced ...
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New Adaptive Method for IQ Imbalance Compensation of Quadrature Modulators in Predistortion Systems
... High data rate wireless communications systems use spec- trally e ffi cient modulations such as the orthogonal frequency division multiplexing (OFDM). These systems are highly sensitive to the nonlinear distortion ...
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EVM derivation of multicarrier signals to determine the operating point of the power amplifier considering clipping and predistortion
... are digital predistortion (DPD) [6], linear amplifica- tion with nonlinear component (LINC) [7], and feedback ...the predistortion as a linearization ...
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A Low-Complexity Dual-Band Model for Dual-Band Power Amplifiers Based on Volterra Series
... In order to solve this problem effectively, some concurrent dual-band DPD techniques have been proposed in previous works. In [10], a two-dimensional digital predistortion (2D-DPD) model was applied in the ...
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Adaptive digital polynomial predistortion linearisation for RF power amplifiers
... Early predistortion linearisation techniques were based around an analogue dis- tortion or signal ...using digital systems to control either analogue or digitally generated IM ...when predistortion ...
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Enabling Baseband and Radio-Frequency Characterization of Supply-Modulated Power Amplifiers Using a Wideband Nonlinear Measurement Platform
... 1. Digital predistortion linearization is a well established method of distortion ...a digital predistorter. 2. The performance of the digital predistorter is severely affected by any linear ...
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