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二元周期序列的线性复杂率与k-错复杂度的关系 总被引:2,自引:0,他引:2
k-错复杂度是指改变序列一个周期段中k个或少于k个符号后所得序列的最小线性复杂度。该文讨论了周期为2~pq(q为奇素数,2是模q~2的本原根)的二元序列线性复杂度与k的关系,这里k是满足LC_k(S~N)相似文献
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稀疏序列用于数字信号处理技术.针对作者所给出的一类稀疏序列,本文给出此类序列的若干有实用价值的构造方法,这些构造方法使得其最小周期达到最大. 相似文献
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2mpn周期二元序列的线性复杂度和k错线性复杂度 总被引:2,自引:0,他引:2
序列线性复杂度的稳定性是衡量其随机性好坏的一个重要指标.针对2mpn周期二元序列,利用多项式分解等工具,确定了使得序列的k错线性复杂度严格小于其线性复杂度的最小k值的上下界,其中n是正整数,m是非负整数,P是奇素数,2是模p2的原根. 相似文献
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线性复杂度和k- 错线性复杂度是度量密钥流序列密码强度的重要指标。为了更好地研究序列的随机性,该文通过将序列的k-错线性复杂度的计算转化为求Hamming重量最小的错误序列的方法,讨论了序列不同k-错线性复杂度条件下对应的k-错误序列的分布情况。基于Games-Chan算法,该文给出了线性复杂度为2n的2n-周期二元序列的3错误序列的计数公式,计算机编程验证了该文方法的正确性。 相似文献
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自缩控(SSC)序列是一类重要的伪随机序列,而伪随机序列在通信加密、编码技术等很多领域中有着广泛的应用.在这些应用中,通常要求序列具有大周期和高的线性复杂度.为了构造出周期更大、线性复杂度更高的伪随机序列,该文基于GF(3)上的m-序列构造了一种新型自缩控序列模型,利用有限域理论研究了生成序列的周期和线性复杂度,得到的生成序列周期和线性复杂度大大提高,且得到生成序列线性复杂度更精确的一个上界值,从而提高了生成序列在通信加密中的防攻击能力和安全性能. 相似文献
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本文介绍一种新型电动自行车充电器,它具有自动断电功能。当蓄电池充电完成后电量检测电路输出电压控制断电电路,断电电路动作,自动关断充电器输入的交流电源。经测试,设计的充电器的断电电路反应速度快、性能稳定、可靠。该充电器成本低,能节约电能,具有实用价值。 相似文献
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《Spectrum, IEEE》2008,45(12):36-41
Car buyers everywhere are spurning gas guzzlers, and some carmakers feel the pain more than others. Take Mercedes-Benz, long known for its luxury cars?its flagship S-Class is a full-size sedan that starts at around US $90,000. Without sacrificing performance or comfort, the company must meet the expectations of its increasingly environmentally conscious customers. 相似文献
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A new polyphase phase-locked oscillator (P-PLO) is proposed which overcomes one of the greatest difficulties in the passive bus configuration: timing extraction from signals in multiplexed channels with different mean phases. The proposed oscillator generates appropriate retiming clock pulses for each channel independent of other channels. Moreover, since pulse overlaps between channels may appear at the first and last bits of each channel, the oscillator shifts retiming clock phases of these bits to avoid sampling overlaps. A performance analysis method extended from the conventional Markov chain model is also proposed. The theoretically obtained jitter and retiming margin characteristics correspond closely to experimental results. This circuit is also shown to be adaptable to point-to-point configurations which, like passive bus, will be used in the ISDN basic interface recommended as one of the 1-series interfaces by CCITT. This allows easy rearrangement of interface wiring, e.g., changing from the passive bus to point-to-point configuration, without any adjustment of the network terminator. 相似文献