Time-difference-of-arrival estimation algorithms for cyclostationary signals in impulsive noise

  • Authors:

  • Yang Liu;Tianshuang Qiu;Hu Sheng

  • Affiliations:

  • Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China and College of Electronic and Information Engineering, Inner Mongolia University ...;Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China;Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China

  • Venue:
  • Signal Processing
  • Year:
  • 2012

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Abstract

In this paper, new signal-selective methods for the estimation of time-difference-of-arrival in the presence of interfering signals and non-Gaussian symmetric @a-stable impulsive noise are introduced. First, the performance degradation of the conventional approaches based on second-order cyclic statistics is presented. Then, two new classes of robust algorithms are developed using the theory of stable distributions and the cyclostationary property, including the pth-order cyclostationarity methods and the fractional lower-order cyclostationarity methods. It is shown that these new methods are tolerant to interference and robust in both Gaussian and non-Gaussian impulsive noise environments. The improved performance is demonstrated through detailed theoretical analysis and simulations.