中国激光, 2012, 39 (10): 1005006, 网络出版: 2012-08-23  

Chaotic-laser-based true random sequence generation for spread-spectrum communications

Chaotic-laser-based true random sequence generation for spread-spectrum communications
作者单位
1 College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China
2 State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
摘要
Abstract
We propose a scheme for spread-spectrum communications using true random sequences generated by chaotic semiconductor lasers as spreading codes. These sequences can eliminate the inherent periodicity of pseudorandom sequences, enlarge the capacity of spread-spectrum codes, improve communication security, and increase the number of users of the system. When a true random sequence with an appropriate length is used as the spread-spectrum code and the information speed is maintained constant, the system acquires a greater spread-spectrum gain and a lower bit-error ratio (BER) than the traditional spread-spectrum system. The communication security is also enhanced. The BER smoothly increases with the number of users, which indicates the good multiple-access capability of the system.

, , , , . Chaotic-laser-based true random sequence generation for spread-spectrum communications[J]. 中国激光, 2012, 39(10): 1005006. Zhaoxia Zhang, Junjie Zhou, Dongze Zhang, Zheng Fu, and Jianzhong. Chaotic-laser-based true random sequence generation for spread-spectrum communications[J]. Chinese Journal of Lasers, 2012, 39(10): 1005006.

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