Robust Detection of Nuclear Quadrupole Resonance Signals in a Non-shielded Environment

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Rudberg, Tore (författare): Lund University,Lunds universitet,Matematisk statistik,Matematikcentrum,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Statistics,Centre for Mathematical Sciences,Departments at LTH,Faculty of Engineering, LTH

Jakobsson, Andreas (författare): Lund University,Lunds universitet,Biomedical Modelling and Computation,Forskargrupper vid Lunds universitet,Statistical Signal Processing Group,Matematisk statistik,Matematikcentrum,Institutioner vid LTH,Lunds Tekniska Högskola,Lund University Research Groups,Mathematical Statistics,Centre for Mathematical Sciences,Departments at LTH,Faculty of Engineering, LTH

(creator_code:org_t)

2011
2011
Engelska 5 s.
Ingår i: European Signal Processing Conference. - 2219-5491. ; 2011, s. 2079-2083

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Abstract in UndeterminedNuclear quadrupole resonance (NQR) is a non-invasiveradio-frequency technique allowing for a practically unique%ngerprint for molecules containing quadrupolar nuclei,making the technique very promising for detection purposes.If properly excited, these nuclei will emit electromagnetic radiation,the frequency of which is governed mainly by wherein the molecule the nuclei are positioned. However, the resultingNQR signals are inherently weak and are prone tostrong interference signals from the measurement environment,making detection challenging. In this paper, we developa robust and reliable detection algorithm that generalizeearlier techniques and incorporates both ef%cient interferencecancellation and the ability to handle multiple polymorphsin the sought substance. The usefulness of the algorithmis motivated by comparisons using realistic simulations.

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