众所周知，设计好的跳频码和在混沌跳频通信系统中实现收发双方的同步是很困难的。
As is known it is difficult to design good FH code and synchronize the transmitter and receiver in a chaotic FH communication system.
提出了混沌映射与矢量码书相结合的加密算法。
In this paper, an image encryption algorithm based on chaotic mapping and vector quantization is presented.
根据雷达信号理论，分析了混沌二相码的获取原理。
The principal of acquisition of chaotic binary-phased codes is analyzed according to radar signal theory.
针对短码实值混沌直扩系统，提出了一种基于主元分析的算法，实现了在低信噪比下对直扩序列的盲估计。
A new method of blind estimation for short-code chaotic spread spectrum sequence is proposed, which is based on principal component analysis (PCA) and has good performance at low SNR condition.
针对长码实值混沌直扩系统，提出了两种盲解扩算法。
Two new methods are developed for blind estimation for long-code chaotic spread spectrum sequence.
为了增加异步码分多址通信系统的可用码组，研究了在该系统中使用混沌扩频序列的可能性。
In order to expand the group of ades on communication system with asynchronous code division multiaddress (CDMA), the possibility of using chaotic spreading sequences was researched.
理论分析表明，该混沌序列具有较理想的A -CD MA扩频码性能。
The theoretical analysis shows that the chaotic sequences serve as spreading codes for A-CDMA.
为了增大混沌跳频码的周期和非线性复杂度，我们利用多个不同混沌映射组成一个级联混沌映射，并用来设计跳频码。
In order to enhance the nonlinearity and period length, different chaotic maps are combined into a cascaded chaotic map to design FH codes.
基于混沌跳频码序列构造固有的确定性、非线性等特点，提出了对抗混沌跳频通信的非线性自适应预测对抗的新概念。
Based on the deterministic characterization of chaotic FH code construction and nonlinear dynamics of chaotic FH code, nonlinear adaptive predictive countermeasure method is proposed to interfere.
深入研究了实际侦收到的跳频码的混沌特性，提出了跳频码的混沌模型。
Fifthly, we lucubrate the chaotic characteristic of the real hopping frequency codes and propose the chaotic model of hopping frequency codes.
深入研究了实际侦收到的跳频码的混沌特性，提出了跳频码的混沌模型。
Fifthly, we lucubrate the chaotic characteristic of the real hopping frequency codes and propose the chaotic model of hopping frequency codes.
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