DocumentCode :
3755985
Title :
Excision of a discontinuous-frequency interference signal with harmonic structure
Author :
McKay E. Bonham;Todd K. Moon;Jacob H. Gunther;Gustavious Williams
Author_Institution :
Information Dynamics Lab, Electrical and Computer Engineering Department Utah State University
fYear :
2015
Firstpage :
1719
Lastpage :
1722
Abstract :
We consider the problem of excising a sinusoidal signal which is piecewise constant in frequency with random transition times, and which is duplicated at fixed frequency offsets. This signal interferes with a signal of interest. To remove this interfering signal, the most likely interfering frequencies at each point in time are estimated using a pair of sliding estimation windows obtained using compressed likelihood techniques, which account for all shifted versions of the interfering signals. This two-window approach avoids line broadening. The exact transition times are then estimated using median filtering, a sliding two-window scan of changes in frequency, and fine-tuning by comparison with the original signal. After identifying frequency transition times and the local interfering frequency, the interference is excised from the band of interest.
Keywords :
"Time-frequency analysis","Frequency estimation","Interference","Standards","Maximum likelihood estimation","Noise measurement"
Publisher :
ieee
Conference_Titel :
Signals, Systems and Computers, 2015 49th Asilomar Conference on
Electronic_ISBN :
1058-6393
Type :
conf
DOI :
10.1109/ACSSC.2015.7421443
Filename :
7421443
Link To Document :
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