共查询到19条相似文献,搜索用时 64 毫秒
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一种语音混沌保密通信方案的DSP实现 总被引:1,自引:1,他引:1
针对混沌通信的技术实现问题,提出用第一类分段Lorenz系统通过驱动-响应式同步的方法实现语音混沌保密通信的方案,包括利用数字化处理技术,对连续时间系统作离散化处理,以及用5509系列数字信号处理器实现该方案的系统设计原理与具体实现过程。理论分析与硬件实现结果证明了该方法的可行性。 相似文献
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针对目前数字混沌保密方法中计算量大的不足,提出了一种可在单片机上实现的改进混沌保密方法,并将该方法用于数字语音混沌保密通信。分析了该方法中运用整数运算代替浮点运算降低计算量的原理与过程,着重说明了改进的混沌算法在单片机上的实现。最后,在AT89C51单片机上成功进行了数字语音的混沌保密通信实验并取得了令人满意的结果。 相似文献
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1引言混沌是本世纪最重要的科学发现之一,被誉为继相对论和量子力学后的第三次物理学革命,它打破了确定性与随机性之间不可逾越的分界线,将经典力学研究推进到一个崭新的时代[1,2]。混沌理论及其应用是当今世界范围内一个极富挑战性、具有巨大前景的前沿课题和学... 相似文献
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本文概括了基于混沌的三大保密通信技术,重点讨论了几种混沌保密通信新技术的原理以及它的特点,同时给出了混沌保密通信应用与实际还存在的一些需要进一步克服的缺陷并对混沌保密通信应用前景做了展望。 相似文献
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提出了一种利用混沌对初始值的极端敏感性的音频信息隐藏新方法。该算法通过混沌序列来选取小波基,同时另一混沌序列控制秘密数据的隐藏位置。解密时不需要载体数据,属于盲提取。该算法充分利用了传统保密通信和信息隐藏的优点,实验验证,具有较高的保密性质。 相似文献
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以Lorenz时滞混沌系统为研究对象,基于Lyapunov -Krasovskii泛函理论,设计了一组线性控制器实现混沌同步.所设计的控制律简单,鲁棒性强并且易于实现.为验证所提出的控制算法的有效性,基于DSP builder设计了时滞混沌系统的数字电路,并在数字电路上完成了混沌系统的同步仿真.仿真结果表明所设计的控制器取得了很好的控制效果. 相似文献
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混沌系统被广泛应用于军事保密通信和信息安全领域,该文在Liu混沌系统基础上设计了一个新型混沌系统,并重点对新型混沌系统的基本动力学特性进行了分析,包括系统的分岔图、相图、Lyapunov指数图分析。在保留了Liu混沌系统的优点基础上,增加了参数个数,扩大了参数范围,最后利用DSP实现了该新型混沌系统,并对Liu混沌系统生成的数字序列和改进后的序列进行NIST测试,对比测试结果表明改进后的数字序列性能更优。 相似文献
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Virendra K. Janakiram Ramesh Chandra Anil T. Kripalani Ashok N. Rudrapatna Jesse E. Russell 《Journal of Network and Systems Management》1994,2(1):7-27
As the wireless market matures and enters the personal communication era, users will be presented with an exciting array of new, global voice, data, video, and multimedia services. Providers of these services will be hard pressed to utilize new and expensive technologies, and provide high quality service at rates that are economical enough to attract the large customer base that would make these services viable. This implies that many diverse network resources must be optimally utilized and managed. Service providers would need to manage their entire network in an integrated, end-to-end fashion, with minimal technical staffing and expertise. Smart, real time, Network Management (NM), thus, is becoming ever more important for the realization and viability of Personal Communication Services. This paper will examine network management for these emerging services, compared with current wired (i.e., nonwireless) and cellular wireless NM. We will compare NM in both the AMPS and GSM standards, and examine the NM needs of future wireless technologies. We conclude with our view of the directions that NM will take over the next few years. 相似文献
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DSP software development has been tied down by extreme computational requirements. Furthermore, the DSP development tools available today are less advanced than in other embedded software design. This has lead to DSP software architectures that have not taken into account future expansion needs. Therefore, DSP software architectures have been inherently closed. Now, as system complexity increases, this design methodology becomes more of a burden, since it does not support component-based DSP software development that requires open interfaces.
In this paper, mobile-communications DSP software architectures are studied as cases, and key areas for improvements towards more open DSP software development are identified. Proposed solutions are judged against the limited resources of mobile communication terminals and the characteristics of communication DSPs. 相似文献