The theoretical analysis shows that the chaotic sequences serve as spreading codes for A-CDMA.
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。
This paper focuses on the discussion of three methods of generating digital chaotic sequences.
本文集中讨论了三种混沌序列的产生方法。
This paper presents one certain chaotic radar waveforms based on one-dimensional chaotic sequences.
提出了一种基于一维混沌序列的混沌雷达波形。
The chaotic sequences are very easily generated by changing weights of neural network model, and their number is large.
利用网络权值调整的灵活性来产生混沌序列，该模型序列更换容易并且数量巨大。
The operational rules are calculated and proved according to a definition of the distance between two chaotic sequences.
由两串符号序列之间的轨道距离定义推导并证明了相应的运算法则。
Two chaotic sequences are modulated according characters of chaotic system, using for watermark encryption and sub image extraction.
利用混沌系统的特点调制了两种不同的混沌序列，分别用于水印加密和子图像的抽取。
Chaotic sequences were generated, quantized and coded into binary sequences which were used for modulation of UWB signal based on DSP technology.
采用DSP技术产生混沌信号，再量化、编码成二值序列，用来调制uw B脉冲信号。
A general methodology for the design of optimal chaotic spreading sequences by using chaotic sequences filtered by digital IIR filter is provided.
并提出了通用的最佳混沌扩频序列设计方法，即利用数字IIR滤波器滤波混沌序列产生最佳混沌扩频序列。
Introduce the chaos transformation to database watermark working, construct a zero-watermarking algorithm for database based on chaotic sequences.
将混沌变换引入数据库水印处理，构造了一种基于混沌变换的数据库零水印算法。
Moreover, add change of order used chaotic sequences after the initial watermark generated; therefore this can improve the safety of database watermark.
另外，在生成初始水印后又加入了混沌变换置乱水印，因此可提高数据库水印的鲁棒性和安全性。
In these two algorithms, chaotic sequences control some parameters of wavelet transform or decide the hiding location to improve the algorithm itself security.
在这两种算法中，混沌序列控制小波变换的某些参数或决定数据的隐藏位置，提高了算法本身的安全性。
In this paper, a gray image encryption arithmetic based on chaotic sequences is proposed by taking advantage of the encryption template matrix and sort transformation.
讨论了一种以实数值混沌序列为基础，利用加密模板矩阵和排序变换，给出一种灰度图像的加密算法。
This method makes use of good properties of chaotic sequences, such as ease of generation, sensitive dependence on their initial condition and noise like statistic characteristics.
该方法利用混沌序列具有容易生成、对初始条件敏感，以及具有白噪声的统计特性等特点。
In the data encryption systems, chaotic sequences can be used as the secret key to guarantee the safety of data and prohibit the juggle and steal unlawfully towards the data we sent.
在数据加密系统中，通常利用混沌模型迭代产生的序列作为密钥，以保障数据安全，防止非法篡改和窃取。
Chaotic sequences are used to generate scrambling templates changing with parameters. The templates are then applied to scramble digital images; a good encryption effect is achieved.
该方法用混沌序列生成可以随参数而变化的置乱模板，然后用此模板去置乱图像，得到了很好的实验结果。
But there are also problems that the limited accuracy of chaotic sequences in the computer simulation and complex chaotic sequences' chaotic characteristic needs to be further studied.
但该技术中混沌序列在计算机模拟中存在有限精度、混沌序列再加工后的对序列混沌特性的影响等问题有待进一步研究与完善。
A machine with finite precision would lead its chaotic sequences into periodic orbits, while solving the periodic effect of finite precision produce the balance problem of the sequences.
机器的有限精度会导致它的混沌序列进入周期轨道，解决有限精度的短周期效应又会产生序列的平衡问题。
Aiming at defects which are exiting in image encryption algorithm based on chaotic sequences, this paper proposes an image chaotic encryption algorithm based on sampling without replacement.
针对现有基于混沌序列的图像加密算法的缺陷，提出一种基于不放回抽样的图像混沌加密算法。
Considering the characteristic of huge image data, traditional encryption algorithm can't satisfy system's demand, so we bring forward a image encryption algorithm based on chaotic sequences.
考虑到图像数据量大的特点，传统加密算法无法满足系统要求，我们提出了一种基于混沌序列的图像加密算法。
This paper brings forward a text embedding digital watermarking method based on image's DWT domain, meanwhile, using the chaotic sequences to encrypt the text data and BCH code to correct them.
提出了一种在图像小波域中嵌入文字的新型鲁棒水印算法，并对嵌入的文字进行混沌加密和BCH纠错编码。
The results show that both periodic and transitional chaotic sequences have positive maximum Lyapunov exponent, and the small data sets method is robust to the finite word length of the computer.
通过数值计算结果表明：有限字长混沌序列的周期态和过渡态都具有正的最大Lyapunov指数，且小数据量法对有限字长效应是鲁棒的。
Sufficient bit security is necessary for pseudorandom binary sequences drived by chaotic maps.
由混沌映射驱动得到的伪随机二进制序列应确保有足够的比特安全性。
Based on the research of digital chaos communications, a new method that generates key sequences by using more chaotic equations is presented.
在数字混沌保密通信研究的基础上，提出了一种多混沌方程协助生成密钥序列的新方案。
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.
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。
This paper propose one method of constructing direct spreading sequences based on one -dimensional chaotic maps with infinite collapse.
提出了一种基于一维无限折叠混沌映射的直接扩谱序列构造方法。
By considering a chaotic pseudo_random sequence as a symbolic sequence, we present a symbolic dynamics approach for the complexity analysis of chaotic pseudo_random sequences.
通过将混沌伪随机序列看成一个符号序列，提出了用符号动力学的方法来分析混沌伪随机序列的复杂度。
An improved chaotic binary sequences algorithm based on one four-dimension chaotic map is proposed.
提出一种基于四维混沌映射产生混沌二值序列的改进算法。
Experimental results show that this scheme can generate much more spread-spectrum sequences than single chaotic map to satisfy the demand of spread-spectrum communication.
计算机仿真结果表明，该模型产生的混沌扩频序列调整更容易，比基于单一混沌映射能产生更多符合扩频通信要求的扩频序列。
Chaotic systems are sensitive to the initial condition, randomness and correlativity. They can produce good pseudo - stochastic sequences. Therefore, these systems are suitable to the stream cipher.
而混沌系统具有对初始条件敏感性、随机性、相关性等优良的密码学性能，能够产生性能良好的伪随机序列，所以很适合于序列加密。
After being perturbed, chaotic system can generate chaotic binary sequences with uniform distribution and with statistic properties invulnerable to cryptographic analysis.
扰动后的系统服从均匀分布，具有更为理想的扩散特性和置乱特性。
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