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Nonlinear dynamics of iterative decoding systems: analysis and applications
L. Kocarev;F. Lehmann;G.M. Maggio;B. Scanavino;Z. Tasev;A. Vardy
Iterative decoding algorithms may be viewed as high-dimensional nonlinear dynamical systems, depending on a large number of parameters. In this work, we introduce a simplified description of several iterative decoding algorithms in terms of the a posteriori average entropy, and study them as a function of a single parameter that closely approximates the signal-to-noise ratio (SNR). Using this appr...Show More
A novel stopping criterion for turbo codes based on the average a posteriori entropy
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)
Year: 2003 | Conference Paper |
Cited by: Papers (3)
We treat the turbo decoding algorithm as a dynamical system parameterized by a single parameter that closely approximates the signal-to-noise ratio (SNR). A whole range of phenomena known to occur in nonlinear systems, like the existence of multiple fixed points, oscillatory behavior, bifurcations, chaos and transient chaos are found in the turbo decoding algorithm. As an application, we have deve...Show More
Applications of nonlinear dynamics to the turbo decoding algorithm
Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03.
Year: 2003 | Conference Paper |
Cited by: Papers (1)
In this paper, we treat the turbo decoding algorithm as a dynamical system parameterized by the SNR (signal-to-noise ratio). A whole range of nonlinear phenomena, including chaos and transient chaos, have been shown to occur in the turbo decoding algorithm. As an application, we develop an adaptive technique to control transient chaos, leading to an improvement of the BER (bit error rate) performa...Show More
Bifurcations and chaos in the turbo decoding algorithm
Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03.
Year: 2003 | Conference Paper |
Cited by: Papers (4)
In this paper, we treat the turbo decoding algorithm as a dynamical system parameterized by a single parameter that closely approximates the signal-to-noise ratio (SNR). A whole range of phenomena known to occur in nonlinear systems, like the existence of multiple fixed points, oscillatory behavior, bifurcations, chaos and transient chaos are found in the turbo decoding algorithm.Show More
Frequency dependent model of ferromagnetic hysteresis for time domain analysis of cable shields
IEEE 1997, EMC, Austin Style. IEEE 1997 International Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.97CH36113)
Year: 1997 | Conference Paper |
Cited by: Papers (1)
This paper describes a simple numerical technique for time-domain analysis of ferromagnetic tubular shields taking into account the effects of hysteresis. The frequency dependent Jiles model of ferromagnetic hysteresis and the finite difference technique are used to solve the field distribution inside the ferromagnetic shield in time-domain. The effects of the ferromagnetic hysteresis on the shiel...Show More
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