Synchronized Chaotic Lu System in CDMA Satellite Communication Using Genetic Algorithm

2006 ◽  
Author(s):  
K. Kemih ◽  
M. Benslama
Keyword(s):  
Genetic Algorithm ◽  
Satellite Communication ◽  
Lü System ◽  
Lu System

The Chaotic-BOC Used in the Positioning of L1 Signal in GPS/Galileo System

2011 ◽  
Vol 58-60 ◽  
pp. 2450-2455 ◽  
Author(s):  
Zhao Chen ◽  
Jin Cui Guo ◽  
Juan Zhao ◽  
Tian Hao Tang ◽  
Bo Li
Keyword(s):  
Spread Spectrum ◽  
Satellite Communication ◽  
Three Dimension ◽  
Lü System ◽  
Galileo System ◽  
Orthogonal Components ◽  
Open Service ◽  
Galileo Satellite ◽  
Chaos Sequence ◽  
Lu System

The modulation technologies of L1 signal in GPS/Galileo system have reached many achievements. The chaotic-BOC modulation showed the new usage of signal modulation in Galileo satellite communication. The Lü system (LS) chaos sequence has perfect chaotic characteristic in three -dimension discrete dynamic systems; especially the three-dimension data can be three orthogonal components. From the acquisition and positioning of L1 signal, the chaotic-BOC modulation technology was a right way to choose. The positioning way need the three parameters of the satellite at least here just use the three-dimension chaos system which could be used the three received signals demodulated to get the synchronized signals. These three parts used the Lü system chaotic sequence to solve the spread spectrum communication. Some simulation figure and data illustrated the chaotic system performance which approached to the original PN in GPS/Galileo system. As L1 signal is for civil application and open service, the chaotic way was significant for the future use.

scholarly journals Dynamic Beam Hopping Time Slots Allocation Based on Genetic Algorithm of Satellite Communication under Time-Varying Rain Attenuation

Electronics ◽  
2021 ◽  
Vol 10 (23) ◽  
pp. 2909
Author(s):  
Chen Zhang ◽  
Jiangtao Yang ◽  
Yong Zhang ◽  
Ziwei Liu ◽  
Gengxin Zhang
Keyword(s):  
Genetic Algorithm ◽  
Resource Allocation ◽  
Satellite Communication ◽  
Rain Attenuation ◽  
Time Varying ◽  
Dynamic Allocation ◽  
Satellite Systems ◽  
Flexible Resource ◽  
Conventional Methods ◽  
High Level

Beam hopping technology is considered to provide a high level of flexible resource allocation to manage uneven traffic requests in multi-beam high throughput satellite systems. Conventional beam hopping resource allocation methods assume constant rainfall attenuation. Different from conventional methods, by employing genetic algorithm this paper studies dynamic beam hopping time slots allocation under the effect of time-varying rain attenuation. Firstly, a beam hopping system model as well as rain attenuation time series based on Dirac lognormal distribution are provided. On this basis, the dynamic allocation method by employing genetic algorithm is proposed to obtain both quantity and arrangement of time slots allocated for each beam. Simulation results show that, compared with conventional methods, the proposed algorithm can dynamically adjust time slots allocation to meet the non-uniform traffic requirements of each beam under the effect of time-varying rain attenuation and effectively improve system performance.

Tracking the state of the delay hyperchaotic Lü system using the coullet chaotic system via a single controller

Complexity ◽  
2014 ◽  
Vol 21 (5) ◽  
pp. 125-130 ◽  
Author(s):  
Yan Zhou ◽  
Xuerong Shi ◽  
Zuolei Wang ◽  
Juanjuan Huang ◽  
Keming Tang ◽  
...  
Keyword(s):  
Chaotic System ◽  
The State ◽  
Lü System ◽  
Single Controller ◽  
Hyperchaotic Lu System ◽  
Lu System

THE NONEQUIVALENCE AND DIMENSION FORMULA FOR ATTRACTORS OF LORENZ-TYPE SYSTEMS

2013 ◽  
Vol 23 (12) ◽  
pp. 1350200 ◽  
Author(s):  
YUMING CHEN ◽  
QIGUI YANG
Keyword(s):  
Upper Bound ◽  
Analytical Formula ◽  
Type Systems ◽  
Lyapunov Dimension ◽  
Dimension Formula ◽  
Lü System ◽  
Suitable Parameter ◽  
Lu System

In this paper, Lü system with a set of chaotic parameters is proved to be smoothly nonequivalent to Chen and Lorenz systems with any parameter. The analytical formula for the upper bound of Lyapunov dimension of attractors in Lorenz-type systems are presented under some suitable parameter conditions. These properties studied in this paper may contribute to a better understanding of the Lorenz-type systems.

scholarly journals Darboux integrability of the Lü system

2013 ◽  
Vol 63 ◽  
pp. 118-128 ◽  
Author(s):  
Jaume Llibre ◽  
Adam Mahdi ◽  
Clàudia Valls
Keyword(s):  
Darboux Integrability ◽  
Lü System ◽  
Lu System

Anti-Synchronization Control of the Complex Lu System

2014 ◽  
Vol 721 ◽  
pp. 269-272
Author(s):  
Fan Di Zhang
Keyword(s):  
Complex System ◽  
Fractional Order ◽  
Control Strategy ◽  
Stability Theorem ◽  
Projective Synchronization ◽  
Synchronization Control ◽  
Fractional Order Systems ◽  
Lü System ◽  
The Stability ◽  
Lu System

This paper propose fractional-order Lu complex system. Moreover, projective synchronization control of the fractional-order hyper-chaotic complex Lu system is studied based on feedback technique and the stability theorem of fractional-order systems, the scheme of anti-synchronization for the fractional-order hyper-chaotic complex Lu system is presented. Numerical simulations on examples are presented to show the effectiveness of the proposed control strategy.

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