摘要
针对C/A码数量有限、码长度固定且较短的问题,提出了一种新的基于耦合映像格子(couple map lattices,CML)模型生成C/A码的新方法。该方法基于时空混沌单向耦合映像格子模型生成时空混沌序列,并利用其不变分布特性将时空混沌序列二值化,利用生成的二值序列生成C/A码。仿真结果表明,生成的混沌二值序列具有良好的伪随机性、参数敏感性和复杂性,由时空混沌二值序列生成的C/A码可以代替传统m序列生成的C/A码,同时能够解决传统C/A码数量有限、长度固定、保密性不高的缺陷,在实际应用中更有优势。
Based on coupled map lattice model, the article offers a method of generating C/A code. The method is based on spatiotemporal chaos one - way coupled map lattice model generating spatiotemporal chaos sequence, and binarizes the spatiotemporal chaos sequence based on the characters of the constant distribution using the generated binary sequences generated C/A code. Simulation results show that the generated chaotic binary sequences have good pseudo -randomness, parameter sensitivity and complexity, and that the C/A code generated by the spatiotemporal chaotic binary sequences can replace the C/A code generated by m - sequences. At the same time, it is able to solve the problems, such as limited quantities, fixed length and low confidentiality of the traditional C/A code and shows more advantages in the application.
出处
《计算机仿真》
CSCD
北大核心
2014年第6期225-229,共5页
Computer Simulation
关键词
耦合映像格子
不变分布
二值序列
Coupled map lattices（CML）
Invariant distribution
Binary sequence
