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Signal detection

Kidd, Moray and Shi, John Z. (2008) Signal detection. WO2008139134.

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Abstract

According to an asupect of the present invention, there is provided a method of detecting an abnormal signal in a compound sampled signal recorded in the time domain, the method comprising: dividing the sampled signal recorded in the time domain into a plurality of sample segments; transforming each of the plurality of the sample segments from the time domain into the frequency domain to determine a plurality of transformed sample segments, each transformed sample segment having a plurality of frequency points, each frequency point having an amplitude associated with a certain frequency; for a frequency point in a given transformed sample segment, determining a ratio by dividing the amplitude of the frequency point by a value indicative of an average of the amplitudes of the frequency points at the same frequency across a plurality of transformed sample segments; repeating the determination of a ratio for a plurality of frequency points in each transformed sample segment to determine a plurality of ratios for each transformed sample segment; repeating the determination of a plurality of ratios for a plurality of transformed sample segments; and using the ratios to detect the abnormal signal in the compound sampled signal.

Item Type: Patent
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics
Schools: School of Computing and Engineering > Automotive Engineering Research Group
School of Computing and Engineering
School of Computing and Engineering > Diagnostic Engineering Research Centre
School of Computing and Engineering > Diagnostic Engineering Research Centre > Measurement System and Signal Processing Research Group
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Depositing User: Zhanqun Shi
Date Deposited: 18 Jun 2009 10:17
Last Modified: 08 Dec 2010 13:49
URI: http://eprints.hud.ac.uk/id/eprint/4365

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