Results 271 to 280 of about 23,384 (296)

An exact algorithm for graph coloring with polynomial memory [PDF]

open access: yes, 2006
In this paper, we give an algorithm that computes the chromatic number of a graph in O(5.283n) time and polynomial ...
Bodlaender, H.L., Kratsch, D.
openaire   +2 more sources

A New Predistorter Based on Memory Polynomials and LUT

2005 IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2006
Digital base band predistortion is a highly cost-effective way to linearize PAs, but the existing architectures assume that the PA has a memory less nonlinearity. For wideband application, such as DVB-T (digital video broadcasting-terrestrial) system, PA memory effects can no longer be ignored.
null Yong Liu   +2 more
openaire   +1 more source

A PSO Based Memory Polynomial Predistorter With Embedded Dimension Estimation

IEEE Transactions on Broadcasting, 2013
Power amplifiers are widely used in RF broadcasting applications. However, they tend to exhibit nonlinear behavior that distorts the input signals both in the time and frequency domains, consequently motivating the development of techniques, such as digital predistortion, which can counteract this behavior.
Abubakr Hassan Abdelhafiz   +4 more
openaire   +1 more source

A Robust Digital Baseband Predistorter Constructed Using Memory Polynomials

IEEE Transactions on Communications, 2004
Power amplifiers (PAs) are inherently nonlinear devices and are used in virtually all communications systems. Digital baseband predistortion is a highly cost-effective way to linearize PAs, but most existing architectures assume that the PA has a memoryless nonlinearity.
Lei Ding 0001   +6 more
openaire   +1 more source

Analysis of stochastic gradient identification of polynomial nonlinear systems with memory

1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258), 1999
This paper presents analytical, numerical and experimental results for a stochastic gradient adaptive scheme which identifies a polynomial-type nonlinear system with memory for noisy output observations. The analysis includes the computation of the stationary points, the mean square error surface, and the mean behaviour of the algorithm for Gaussian ...
Patrick Celka   +2 more
openaire   +1 more source

Polynomial approximations to functionals in the theory of materials with memory

Zeitschrift für angewandte Mathematik und Physik ZAMP, 1966
Pour une substance dotee de memoire, on peut quelquefois determiner approximativement, d'une maniere utile, la valeur fonctionelle Φ, qui relie l'effort a l'histoire de la doformation, par un polynome aux elements d'un espaceL de formes lineaires sur l'espaceF des histoires.
openaire   +2 more sources

Identification of Generalized Memory Polynomials Using Two-Tone Signals

IEEE Transactions on Signal Processing, 2018
This paper shows that the coefficients of a generalized memory polynomial model of a nonlinear device can be estimated by examining the output when the input is a series of two-tone signals. There are several benefits to using two-tone signals rather than noise-like waveforms for system identification, including the relative ease of generating two-tone
openaire   +1 more source

A Compact Envelope-Memory Polynomial for RF Transmitters Modeling With Application to Baseband and RF-Digital Predistortion

IEEE Microwave and Wireless Components Letters, 2008
Oualid Hammi   +2 more
exaly  

Polynomial loss of memory for maps of the interval with a neutral fixed point

Discrete and Continuous Dynamical Systems, 2015
Romain Aimino, Huyi Hu, Matthew Nicol
exaly  

Polynomial stability for wave equations with acoustic boundary conditions and boundary memory damping

Applied Mathematics and Computation, 2018
Chan Li, Jin Liang, Ti-Jun Xiao
exaly  

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