Title :
A chaotic SS code generating method and its application to a DS-UWB system
Author :
Zhu, Canyan ; Wang, Yiming ; Liu, Jiasheng ; Yang, Jianfeng
Author_Institution :
Sch. of EI Eng., Soochow Univ., Suzhou
Abstract :
The presently existing methods for generating chaotic binary sequence under finite precision are first studied in this paper, the short cyclic behavior of chaotic sequences is analyzed in detail. At the same time, a chaotic similar function is defined for presenting the cyclic characteristics of the sequences. Based on these efforts, an improved method with scrambling control for generating chaotic binary sequences is proposed. To quantitatively describe the improvement of periodic performance of the sequences, an orthogonal estimator is then defined. Some simulating experiments are also given in this paper. We also apply the short chaotic binary sequence, which is generated by our proposed method, to a multiuser DS-UWB system as a SS code, and compare the application performance with that of the conventional Kasami code. All the results in this paper demonstrate that our proposed method can effectively increase the period of the short chaotic binary code, and more evidently improve the performance of the DS-UWB system.
Keywords :
binary sequences; chaos; ultra wideband communication; DS-UWB system; Kasami code; chaotic SS code; chaotic binary sequence; Binary codes; Binary sequences; Chaos; Chaotic communication; Mobile communication; Neural networks; Nonlinear equations; Signal analysis; Signal generators; Signal processing;
Conference_Titel :
Neural Networks and Signal Processing, 2008 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-2310-1
Electronic_ISBN :
978-1-4244-2311-8
DOI :
10.1109/ICNNSP.2008.4590320