[PDF] Top 20 Distortion Mitigation Using Digital Predistortion
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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 ... See full document
5
Adaptive digital predistortion for wideband high crest factor applications based on the WACP optimization objective
... to predistortion, after Initial Setting, after forced drift and after On-Air Adaption are presented for each target ...in distortion from Initial Setting ...reduce distortion back to an Initial ... See full document
269
Adaptive digital polynomial predistortion linearisation for RF power amplifiers
... Early predistortion linearisation techniques were based around an analogue dis- tortion or signal ...single distortion element were found to be less effective than individual ...possible using ... See full document
144
Mitigation of Geometrical Attack in Digital Image Watermarking using Different Transform Based Functions
... The digital watermarking protects the violation of copyright and intellectual property of ...of digital watermarking depend on the process of algorithm selection and minimum distortion of the ... See full document
10
Prototype Implementation of Two Efficient Low-Complexity Digital Predistortion Algorithms
... two digital predistorters (PD) that are identified from measurement data of a broadband power amplifier ...identified using a least-squares (LS)-based al- ... See full document
15
Digital predistortion of power amplifiers using look up table method with memory effects for LTE wireless systems
... signal distortion, it allows engineers to address many base stations/mobile device PA design ...a digital predistorter in the baseband, the PA is allowed to operate into its nonlinear region, thereby ... See full document
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A New Accurate Volterra-Based Model for Behavioral Modeling and Digital Predistortion of RF Power Amplifiers
... In most real PAs, the static nonlinearities and low-order dynamics are the dominant sources of the distortions induced by the PA [12]. In addition, the GMP model (Equation (6) together with (7), (8)) has proven effective ... See full document
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Adaptive digital predistortion linearisation for RF power amplifiers
... Generation of frequency components not present in the excitation is one effect a non-linear device can exhibit [1]. Of concern in communication sys- tems is the amplitude and phase distortion which causes the ... See full document
5
A Robust Augmented Combination of Digital Predistortion and Crest Factor Reduction for RF Power Amplifiers
... To overcome this problem, several methods have been proposed in the literature [4–7]. The main approach is reducing the PAPR, but a peak reduction of the complex baseband signal is generally at the expense of additional ... See full document
11
A Direct Learning Digital Predistortion Algorithm to Accurately Compensate for the Power Amplifier Nonlinearity
... Simulations were also carried out to calculate the adjacent channel leakage ratio (ACLR), which indicates the nonlinear distortion of a PA. The ALCR of the PA with our new DPD algorithm was calculated and compared ... See full document
6
Power Amplifier Linearization Using Multi-Stage Digital Predistortion Based On Indirect Learning Architecture
... for digital predistortion using QR ...estimated using Indirect Learning Approach ...the predistortion is implemented in two or more stages as compared to the single stage implementation ... See full document
8
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 ... See full document
8
Iterative Cancellation Of Non-Linear Distortion Noise In Digital Communication Systems
... non-linear distortion. Thelinear distortion is attributed to mismatch of the signal spectrumand the spectral response of the filters along the chain, whilethe non- linear distortion originates from ... See full document
12
Performance Evaluation of Digital Pre Distortion Technique using Low Complexity and Low Precision ADC
... the Digital Pre-Distortion linearization technique using a low-precision Analog-to-Digital Converter ...intermodulation distortion (IMD) products due to its non-linear ...mandatory. ... See full document
5
Supply Chain Risk Management: A Review of Thirteen Years of Research
... Risk management within SCs is an ongoing activity. Although many tools allow today to address them, however, they struggle to eradicate completely. The un- certainty surrounding the environment is a catalyst for their ... See full document
27
Distortion analysis of voltage controlled oscillator based Analog to Digital converters
... ADCs digital calibration is needed for the new VCO-based ADC design to increase the dynamic ...Without digital calibration the performance of this new design is limited by the nonlinearity of the ring ...by ... See full document
77
Distortion-Free 1-Bit PWM Coding for Digital Audio Signals
... (iii) An optional input PCM amplitude quantizer stage (e.g., from N = 16 to N = 8 bit), so that the final PWM clock rates can be kept to desirable low values. More specif- ically, according to (1), the PWM clock rate in ... See full document
12
Predicting Total Harmonic Distortion (THD) in Asymmetric Digital Subscriber Line (ADSL) Transformers using Simulation
... ADSL has proved a significant step in the development of digital subscriber line (DSL) technology, as it has probably the best defined standard (IEEE Standard T1.413-1995 [1]) that is actually implemented de facto ... See full document
8
Implications of MODIS bow-tie distortion on aerosol optical depth retrievals, and techniques for mitigation
... The mitigation is fairly straightforward for this example because the MXD04 spatial resolution matches the along-track length of one scan ...the distortion will have an irregular impact on the ac- tual and ... See full document
12
Mitigation of welding distortion and residual stresses via cryogenic CO2 cooling - a numerical investigation
... angular distortion and are deemed to arise from the contraction forces developed by the fused material from cooling temperatures ranging between the cut-off temperature and ambient ... See full document
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