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论文类型： 期刊论文

发表时间： 2008-12-01

发表刊物： JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS

收录刊物： SCIE

卷号： 19

期号： 6

页面范围： 1102-1108

ISSN号： 1004-4132

关键字： HB weighted; time delay; covariation; fractional lower order covariance

摘要： 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 a-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 <= alpha <= 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 < alpha <= 2.