New HB-weighted time delay estimation algorithm under impulsive noise environment |
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Authors: | Sun Yongmei Qiu Tianshuang[Author vitae] |
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Institution: | aSchool of Electronic and Information Engineering, Dalian Univ. of Technology, Dalian 116024, P. R. China;bSchool of Electric and Information Engineering, Dalian Jiaotong Univ., Dalian 116028, P. R. China |
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Abstract: | The traditional HB-weighted time-delay estimation (TDE) method degenerates under the impulsive noise environment. Two new time-delay estimation methods are proposed based on fractional lower order statistics (FLOS) according to the impulsive characteristics of fractional lower order α-stable noises. Theoretic analysis and computer simulations indicate that the proposed covariation based HB weighted (COV-HB) algorithm can suppress impulsive noises in one received signal for 1 ≤α ≤ 2, whereas the other proposed fractional lower order covariance-based HB weighted (FLOC-HB) algorithm has robust performance under arbitrary impulsive noise conditions for the whole range of 0 <α ≤ 2. |
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Keywords: | HB weighted time delay covariation fractional lower order covariance |
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