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Your search keyword '"Liao, Teh-Lu"' showing total 25 results
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25 results on '"Liao, Teh-Lu"'

20. Robust chaos suppression design for a nonlinear energy resource system with uncertainties in the control input.

Author

Huang, Cheng-Fang, Liao, Teh-Lu, and Yan, Jun-Juh

Abstract

Based on the sliding mode control, this paper proposes a robust systematic design procedure to suppress the chaos found in the four-dimensional energy resource system. This approach only uses a single controller to realize chaos suppression, which reduces the cost and complexity for control implementation. Furthermore, the proposed controller is robust such that the chaos can be suppressed even with uncertainties in the control input. Numerical results are included to validate the effectiveness of the proposed robust control scheme. [ABSTRACT FROM PUBLISHER]

Published
2013
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21. Iterative Synchronization-Assisted Detection of OFDM Signals in Cognitive Radio Systems.

Author

Chin, Wen-Long, Kao, Chun-Wei, Chen, Hsiao-Hwa, and Liao, Teh-Lu

Subjects
ORTHOGONAL frequency division multiplexing, COGNITIVE radio, SIGNAL detection, SIGNAL processing, STOCHASTIC systems
Abstract

Despite many attractive features of an orthogonal frequency-division multiplexing (OFDM) system, the signal detection in an OFDM system over multipath fading channels remains a challenging issue, particularly in a relatively low signal-to-noise ratio (SNR) scenario. This paper presents an iterative synchronization-assisted OFDM signal detection scheme for cognitive radio (CR) applications over multipath channels in low-SNR regions. To detect an OFDM signal, a log-likelihood ratio (LLR) test is employed without additional pilot symbols using a cyclic prefix (CP). Analytical results indicate that the LLR of received samples at a low SNR can be approximated by their log-likelihood (LL) functions, thus allowing us to estimate synchronization parameters for signal detection. The LL function is complex and depends on various parameters, including correlation coefficient, carrier frequency offset (CFO), symbol timing offset, and channel length. Decomposing a synchronization problem into several relatively simple parameter estimation subproblems eliminates a multidimensional grid search. An iterative scheme is also devised to implement a synchronization process. Simulation results confirm the effectiveness of the proposed detector. [ABSTRACT FROM PUBLISHER]

Published
2014
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24. Global Stability for Cellular Neural Networks with Time Delay.

Author

Liao, Teh-Lu and Wang, Fong-Chin

Subjects
*ARTIFICIAL neural networks, *TIME delay systems
Abstract

Presents information on a study which derived a condition related to the existence of an equilibrium point and its global asymptotic stability for cellular neural networks with delay (DCNN). Description of the dynamics of a continuous time DCNN; Global stability of DCNN; Conclusions.

Published
2000

25. An Observer-Based Approach for Chaotic Synchronization with Applications to Secure Communications.

Author

Liao, Teh-Lu and Huang, Nan-Sheng

Subjects
*CHAOS theory, *SYNCHRONIZATION, *OBSERVABILITY (Control theory)
Abstract

Presents information on a study which developed a systematic approach based on the linear-state-observer design for constructing chaotically synchronized systems. Problem formulation; Chaotic synchronization via linear-state-observer design; Chaotic secure communication via linear-state-observer design; Examples and simulation results; Conclusions.

Published
1999
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