Systems Engineering and Electronics ›› 2020, Vol. 42 ›› Issue (4): 749-755.doi: 10.3969/j.issn.1001-506X.2020.04.03

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Construction and performance research of discrete chaotic measurement matrix

Yuan LUO1(), Jiaojiao DANG1(), Zuxun SONG1,2(), Baoping WANG1,2()   

  1. 1. School of Electronics and Information, Northwestern Polytechnical University, Xi'an, 710072, China
    2. National Key Laboratory of Science and Technology on UAV, Northwestern Polytechnical University, Xi'an, 710065, China
  • Received:2019-01-16 Online:2020-03-28 Published:2020-03-28
  • Supported by:
    国家自然科学基金(61472324)

Abstract:

If the sampling matrix has the restricted isometric property (RIP), the samples will contain enough information to recover the original signal extremely well. Actually, the RIP requirement is hard to verify for a given matrix. Therefore, the Lyapunov exponent as the metric is used to verify the performance of the discrete chaotic measurement matrix. Firstly, the relationship between the RIP and the Lyapunov exponent is analyzed, and a segmentation method is proposed for improving the performance of the chaotic map, then its validity is proved by theory and numerical results. The present results show that the method can both increase the Lyapunov exponent of chaotic map and improve the performance of the generated measurement matrix. Obviously, the Lyapunov exponent is a good metric to verify the performance of the discrete chaotic measurement matrix. By increasing the value of the Lyapunov exponent, the performance of the chaotic measurement matrix can be improved easily.

Key words: chaotic map, measurement matrix, Lyapunov exponent, restricted isometry property (RIP)

CLC Number: 

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