共查询到13条相似文献,搜索用时 62 毫秒
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云发生器是构造云模型不确定性推理和设计云模型智能控制器的基础,全面论述了一种基于硬件真随机数云发生器的实现方法.首先设计一种基于雪崩噪声电路产生的真随机数序列发生器,利用LabVIEW平台构建测试系统对其进行一系列特性检验,进而将该真随机数序列转换为正态分布的真随机数作为云发生器的随机数源,最后设计一种真随机数云发生器算法,并通过LabVIEW平台编程实现.实验结果表明,该真随机数云发生器生成结果十分理想,可为云模型不确定性推理后续研究提供基础. 相似文献
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作为现代加密系统不可或缺的一部分,真随机数发生器(TRNG)在信息安全中具有非常重要的作用。 本文提出了一种
可配置、轻量级、高吞吐量的真随机数发生器。 该结构利用与非门和异或门构成了可配置的异步反馈环形振荡器,通过在短时
间内增加相位噪声,来扩大时间抖动范围,从而改善了熵源的随机性。 该结构在 Xilinx Kintex-7 进行了多次测试验证,实验结果
表明,在不同温度(0℃ ~ 80℃ )和不同输出电压(0. 8~ 1. 2 V)的环境变化下,所提出的 TRNG 具有较强的鲁棒性,在硬件资源上
仅消耗了 43 个 LUTs 和 6 个 DFFs,并且获得高达 300 Mb / s 的吞吐量。 同时,生成的随机比特流能够以较高的 P 值通过 NIST
SP800-22 和 NIST SP800-90B 测试。 相似文献
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功率测量设备的工作范围一般在几百赫,而超声设备的输出一般为几十千赫,甚至几兆赫的高频大电压方波信号,其中还往往含有较多的谐波成分。因此,一般的功率测量设备难以准确地测量出系统的功率。本文采用了真有效值转换技术并以真有效值转换集成芯片AD736为核心部件,合理设计电压、电流采样电路以及功率计算电路,实现了对高频大功率电路的功率测量。此电路可以对超声发生器的输出电功率进行实时监控,也可以应用在其他设备的功率测量系统中。 相似文献
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本文定理1、定理2提出了两种不同情况下密勒阻抗的新算法;定理3论述了经密勒变换后的无源部分网络为变异网络;定理4论述了经密勒变换后的含源部分网络为非变异网络的条件;并由定理1、4和定理2、4得到两个推论. 相似文献
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《International Journal of Circuit Theory and Applications》2017,45(11):1885-1897
This paper presents implementation of a chaotic cellular neural network (CNN)‐based true random number generator on a field programmable gate array (FPGA) board. In this implementation, discrete time model of the chaotic CNN is used as the entropy source. Random number series are generated for three scenarios. Obtained number series are tested by using NIST 800.22 statistical test suite. Also, the scale index technique is carried out for these three scenarios to determine the degree of non‐periodicity for key stream. Copyright © 2017 John Wiley & Sons, Ltd. 相似文献
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A novel non‐autonomous continuous‐time chaotic oscillator suitable for high‐frequency integrated circuit realization is presented. Simulation and experimental results, verifying the circuit feasibility, are given. Two methods for using this oscillator as the core of a random number generator are also proposed. Numerical binary data obtained according to the proposed methods pass the four basic tests of FIPS‐140‐2, while experimental data pass the full NIST‐800‐22 random number test suite. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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S. Callegari R. Rovatti G. Setti 《International Journal of Circuit Theory and Applications》2005,33(1):1-16
True random sources are not implementable in digital hardware, so that many practical applications have historically relied on pseudo‐random generators in order to avoid the potentially long prototyping times and the costs of dedicated analog design. However, pseudo‐random sources have liabilities that make them hardly suitable for some tasks (notably security related ones). Previous attempts to conciliate security, cost‐effectiveness, and rapid development included the exploitation of the analog accessory parts often present on programmable devices. In these designs some analog blocks are used for their side effects (noise amplification) rather than for their originally intended behaviour. Conversely, here we report a direct implementation of a true random source on programmable, low‐cost, general‐purpose hardware, where all blocks are used only for their nominal function. To the best of the authors' knowledge, this is the first proposal of this sort. The design exploits an FPAA, and is based on a non‐linear system exhibiting chaotic behaviour. Measures confirm the correct operation, high throughput, and robustness of the system. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献