ZHOU Yang, ZHENG Zhe, WU Siliang. Signal Delay Reconstruction Method Based on Dynamic Index and Complex-Coefficient Lagrange Interpolation[J]. Chinese Journal of Electronics, 2015, 24(4): 750-754. doi: 10.1049/cje.2015.10.014
Citation: ZHOU Yang, ZHENG Zhe, WU Siliang. Signal Delay Reconstruction Method Based on Dynamic Index and Complex-Coefficient Lagrange Interpolation[J]. Chinese Journal of Electronics, 2015, 24(4): 750-754. doi: 10.1049/cje.2015.10.014

Signal Delay Reconstruction Method Based on Dynamic Index and Complex-Coefficient Lagrange Interpolation

doi: 10.1049/cje.2015.10.014
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  • Corresponding author: ZHENG Zhe (corresponding author)was born in Heilongjiang in 1975. Heworked as post-doctoral fellow in BeijingInstitute of Technology from 2004 to2006. His research interests include superclose-in radar's complex target simulation,clutter simulation and generalizeddynamic channel simulation. (Email:zhengzhebit@bit.edu.cn)
  • Received Date: 2013-06-07
  • Rev Recd Date: 2013-07-25
  • Publish Date: 2015-10-10
  • This paper presents a large-range, high-precision and continuously variable delay reconstruction method for wideband and arbitrary bandlimited signal, which combines dynamic index technique with complex-coefficient Lagrange interpolation technique. The method samples time-continuous bandlimited signal and stores samples in sequence. It manages to obtain the high-precision delay parameters of every sampling period from desired delay to compute the so-called index position variable and interpolator parameters. It dynamically indexes and chooses a set of samples to implement piecewise complex-coefficient Lagrange interpolation for reconstructing the delayed sequences. The time-continuous delay reconstruction signal can be simply accomplished through digital-to-analog conversion. The mathematical model of the method and its transformed form is given, and the arithmetic of dynamic index and complex-coefficient Lagrange interpolation is derived. Simulation and test results show the validity and performance of the method.
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