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Filters
Baseband Volterra filters for implementing carrier based nonlinearities
1998
IEEE Transactions on Signal Processing
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A diagonal coordinate representation for Volterra filters is developed and exploited to derive efficient Volterra filter implementations for processing carrier based input signals. ...
Hence, linear filtering methods are employed to implement the nonlinear filter on a baseband version of the input. Downsampling is then used to reduce computational complexity. ...
It also allows use of standard linear filtering techniques. The efficient implementation of systems with carrier based inputs are obtained by performing filtering on baseband signals. ...
doi:10.1109/78.651189
fatcat:mmg4wxqdk5cblavi2i5cm6cepe
Novel Baseband Equivalent Models of Quadrature Modulated All-Digital Transmitters
[article]
2017
arXiv
pre-print
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This result suggests a new analytically motivated structure of a digital predistortion (DPD) of SMPA nonlinearities in ADT. ...
Numerical simulations in MATLAB are used to verify proposed baseband equivalent model. ...
well suited for practical implementations due to long memory requirements (of the nonlinear part) which would require exponentially large number of coefficients. ...
arXiv:1702.03596v1
fatcat:oxihircpwvdk3gbegcepzkw3pe
Frequency-Selective Predistortion Linearization of RF Power Amplifiers
2008
IEEE transactions on microwave theory and techniques
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The baseband linearization algorithm is next implemented in a field-programmable gate array and experimentally investigated for the linearization of the class-AB LDMOS PA for two carrier wideband code-division ...
Differential memory effects can be revealed in two-tone experiment by the divergence for increasing tone-spacing of the vector Volterra coefficients associated with the lower and upper intermodulations ...
VOLTERRA/WIENER REPRESENTATION The most rigorous theory for including memory effects in not-strongly nonlinear systems is Volterra formalism [11] - [13] . ...
doi:10.1109/tmtt.2007.912241
fatcat:mm6di42q6jcipik4tqf3s7mfu4
Behavioral modeling for digital predistortion of RF power amplifiers: from Volterra series to CPWL functions
2016
2016 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications (PAWR)
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MODELING REQUIREMENTS Most predistorters today are implemented in digital baseband. ...
This conclusion was based on that the PA nonlinearity is represented by a polynomial or Volterra function and the modulated signal is bandlimited. ...
doi:10.1109/pawr.2016.7440126
fatcat:7mnfursuffah3gob3lj6gm5tve
Band-Limited Volterra Series-Based Digital Predistortion for Wideband RF Power Amplifiers
2012
IEEE transactions on microwave theory and techniques
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under modeling, which logically transforms the general Volterra series-based model into a band-limited version. ...
In future ultra wideband systems, this new technique can significantly improve system performance and reduce DPD implementation cost. ...
The model based on the new band-limited basis function can be used to represent a wide range of nonlinear systems, including the general Volterra series if the filter bandwidth is set to infinite. ...
doi:10.1109/tmtt.2012.2222658
fatcat:x5vdt2eel5hy3l3ffv4l3h4u54
Bandwidth-efficient recursive pth-order equalization for correcting baseband distortion in parametric loudspeakers
2006
IEEE Transactions on Audio, Speech, and Language Processing
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A bandwidth-efficient recursive implementation of th-order equalization is developed in order to correct the inherent baseband distortion in parametric loudspeakers. ...
Assuming that the nonlinear system is largely quadratic, a substitution of it can be made by using an analytic pair of all-pass sections cascaded with a squared magnitude block. ...
Square-root preprocessing method for correcting baseband distortion.
Fig. 2 . 2 Fig. 2. SSB-based nonlinear model M[1] as proposed by Spencer et al.
Fig. 3 . 3 Fig. 3. ...
doi:10.1109/tsa.2005.855830
fatcat:wvwblsrl2ze43gktnqjkghp5hi
MIMO Volterra Modeling for Nonlinear Communication Channels
2010
Learning and Nonlinear Models
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This development constitutes the basis for several versions of discrete-time equivalent baseband MIMO Volterra systems presented in the sequel. ...
An overview of the modeling of nonlinear communication channels using MIMO Volterra models is presented in this paper. ...
Equivalent baseband Volterra channel The digital signal processing techniques for communications are generally based on discrete-time equivalent baseband representations of the received signals, which ...
doi:10.21528/lnlm-vol8-no2-art1
fatcat:djjk2bqnpzdxjmdqzgy7rrlopy
Linearization of Concurrent Tri-Band Transmitters Using 3-D Phase-Aligned Pruned Volterra Model
2013
IEEE transactions on microwave theory and techniques
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The proposed tri-band DPD is based on a pruned Volterra model that takes into account the impact of the phase distortion observed in multi-band PAs as well as the compound amplitude distortion. ...
Index Terms-Digital predistortion (DPD), long-term evolution (LTE) advanced carrier aggregation (CA), power amplifier (PA), tri-band, Volterra series. ...
Simon, Department of Electrical and Computer Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB, Canada, for providing technical support for the experimental measurements. ...
doi:10.1109/tmtt.2013.2287176
fatcat:cayhasynmvh7togcha2mcqmw3e
Evolution of Black-Box Models Based on Volterra Series
2015
Journal of Applied Mathematics
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It also discusses the evolution of these models, from a single polynomial to multirate Volterra models, presenting equations and estimation methods. ...
The excitation signals are complex valued, and as a practical issue only first-zone filtered (baseband) equivalent BMs are frequently used, due to the difficulties to implement bandpass models in hardware ...
Unfortunately, this equation is valid only for real valued signals.
Complex Valued Baseband Volterra Series. ...
doi:10.1155/2015/638978
fatcat:nr277gewsnexbakems4fskszrm
A General Architecture for Behavior Modeling of Nonlinear Power Amplifier using Deep Convolutional Neural Network
[article]
2020
arXiv
pre-print
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The Volterra model, several compact Volterra models and neural network models to establish a nonlinear model of power amplifier have all been demonstrated. ...
However, the computational cost of these models increases and their implementation demands more signal processing resources as the signal bandwidth gets wider or the number of carrier aggregation. ...
Using the baseband modulated signal and the sampled baseband signal, the modeling of the nonlinear PA can be build. ...
arXiv:2006.03763v1
fatcat:3e6u52kd3fazlhymic4mh4nrta
An Overview of Volterra Series Based Behavioral Modeling of RF/Microwave Power Amplifiers
2006
2006 IEEE Annual Wireless and Microwave Technology Conference
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This paper presents an overview of recentlydeveloped, simplified Volterra series based, behavioral modeling approaches for radio frequency and microwave power amplifiers. ...
real implementations. ...
Conclusions A short overview of various simplified Volterra series based behavioral models for RF/microwave power amplifiers has been presented in this paper. ...
doi:10.1109/wamicon.2006.351917
fatcat:5xmdeofnk5d35godyjv764q2ia
Characterization of spectral regrowth in microwave amplifiers based on the nonlinear transformation of a complex Gaussian process
1999
IEEE transactions on microwave theory and techniques
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A statistical technique is presented for the characterization of spectral regrowth at the output of a nonlinear amplifier driven by a digitally modulated carrier in a digital radio system. ...
The technique is used in evaluating the spectral regrowth for a CDMA signal. ...
A landmark publication by Bedrosian and Rice [11] considered the case of nonlinear systems with memory and developed expressions for the Volterra transfer functions (Fourier transforms of the Volterra ...
doi:10.1109/22.775437
fatcat:3cphf4iedfch3h3z7tus3vpug4
Single-Model Single-Feedback Digital Predistortion for Concurrent Multi-Band Wireless Transmitters
2015
IEEE transactions on microwave theory and techniques
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Meng in Southeast University, China for his help on the experimental measurements. ...
Firstly, we let the baseband signals , , … , pass a carrier relocation module to form a composite multi-band signal based on the carrier relocation technique, for instance, it can be expressed as, 2' 1 ...
For instance, in this case, DPD may only be used to remove distortion near each carrier for 100 MHz. The rest of distortion can be attenuated by using a band-pass filter. ...
doi:10.1109/tmtt.2015.2429633
fatcat:t32qwina4beankrux5zkdm6umq
Behavioral modeling of RF power amplifiers based on pruned volterra series
2004
IEEE Microwave and Wireless Components Letters
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Index Terms-Behavioral model, FIR digital filters, power amplifier, Volterra series. ...
To model a PA with strong nonlinearities and long memory effects, for example, the general Volterra model involves a great number of coefficients. ...
FIR filter to implement 1531-1309/04$20.00 © 2004 IEEE the convolution for each row of separately. ...
doi:10.1109/lmwc.2004.837380
fatcat:l4qeo7wlefa4no7q6jftcjkcza
Nonlinear Noise Compensation in an Integration System of Fiber-Wireless Communication and Free Space Optical Communication
2020
Advances in Condensed Matter Physics
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We propose and experiment an integration system of fiber-wireless communication and free space optical (FSO) communication based on nonlinear noise compensation. ...
The nonlinear equalizer is employed to compensate the distortion caused by the beating between OFDM signal subcarriers in the combination system. ...
M stands for the number of the taps in two filters. e Volterra equalizer shown in equation ( 2 ) is applied to the integration system to eliminate nonlinear noise. ...
doi:10.1155/2020/9605607
doaj:6109769ea64c4ddcbfbf47b2164776f9
fatcat:adajsuyv5vdm3glkkm3dpfhyie
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