Adaptive noise cancelling of multichannel magnetic resonance sounding signals

E. Dalgaard, E. Auken, J. J. Larsen

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

109 Citationer (Scopus)

Abstrakt

Adaptive noise cancelling of multichannel magnetic resonance sounding (MRS) signals is investigated. An analysis of the noise sources affecting MRS signals show that the applicability of adaptive noise cancelling is primarily limited to cancel powerline harmonics. The problems of handling spikes in MRS signals are discussed and an efficient algorithm for spike detection is presented. The optimum parameters for multichannel adaptive noise cancelling are identified through simulations with synthetic signals added to noise-only recordings from an MRS instrument. We discuss the design and the efficiency of different stacking methods. The results from multichannel adaptive noise cancelling are compared to time-domain multichannel Wiener filtering. Our results show that within the experimental uncertainty the two methods give identical results.

OriginalsprogEngelsk
Sider (fra-til)88-100
Antal sider13
TidsskriftGeophysical Journal International
Vol/bind191
Udgave nummer1
DOI
StatusUdgivet - okt. 2012
Udgivet eksterntJa

Programområde

  • Programområde 2: Vandressourcer

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