| Li Peize (李佩泽),Zhao Bing,Li Wenquan.[J].高技术通讯(英文),2021,27(1):103~109 |
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| Analysis of quaternary digital chaotic sequence performance based on chaotic matrix |
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| DOI：10.3772/j.issn.1006-6748.2021.01.013 |
| 中文关键词: |
| 英文关键词: chaotic matrix, digital chaotic sequence, randomness |
| 基金项目: |
| Author Name | Affiliation | | Li Peize (李佩泽) | (Laboratory of Electronic and Communication Engineering, Heilongjiang University, Harbin 150080, P.R.China) | | Zhao Bing | (Laboratory of Electronic and Communication Engineering, Heilongjiang University, Harbin 150080, P.R.China) | | Li Wenquan | (Laboratory of Electronic and Communication Engineering, Heilongjiang University, Harbin 150080, P.R.China) |
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| 中文摘要: |
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| 英文摘要: |
| With good randomness and high sensitivity to initial values, chaotic sequences have been extensively used in secure communication. Real chaotic sequences are highly sensitive to initial values. It is an analog quantity in the domain of attraction, which is not conducive to the transmission of digital signals. In order to improve the stability, real chaotic sequences can be quantized into digital chaotic sequences.According to the relationship between the information rate and the symbol rate, the symbol rate of binary sequence is the same as the information rate. The information rate can be doubled by quantizing a real-valued sequence into a quaternary sequence. The chaotic sequence has weak periodicity. Moreover, the periodicity of binary digital chaotic sequences is much weaker than that of quaternary chaotic sequences. Compared with the multi-dimensional chaotic map, the one-dimensional chaotic map has small key space and low security. In this paper, a new real-valued chaotic sequence is generated based on the chaotic matrix method constructed by Logistic map and Kent map. Two quantization methods are used to digitize the real-valued chaotic sequence to obtain the quaternary digital chaotic sequence. Moreover, the randomness, the time series complexity and the correlation of the new quaternary chaotic sequence are compared and studied. The simulation results demonstrate that the quaternary digital chaotic sequence obtained by the chaotic matrix has good randomness and correlation. |
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