Noise reduction by dynamic signal preemphasis.

• 武田, 和行

• Takegoshi, K

抄録

In this work we propose an approach to reduce the digitization noise for a given dynamic range, i.e., the number of bits, of an analog to digital converter used in an NMR receiver. In this approach, the receiver gain is dynamically increased so that the free induction decay is recorded in such an emphasized way that the decaying signal is digitized using as many number of bits as possible, and at the stage of data processing, the original signal profile is restored by applying the apodization that compensates the effect of the preemphasis. This approach, which we call APodization after Receiver gain InCrement during Ongoing sequence with Time (APRICOT), is performed in a solid-state system containing a pair of (13)C spins, one of which is fully isotopically labeled and the other is naturally abundant. It is demonstrated that the exceedingly smaller peak buried in the digitization noise in the conventional approach can be revealed by employing APRICOT.

収録刊行物

• Journal of magnetic resonance

  Journal of magnetic resonance 208 (2), 305-308, 2011-02

  Elsevier Inc.

キーワード

• Noise reduction
• Dynamic range
• Digitization noise
• Preemphasis
• Apodization

詳細情報

• CRID: 1050001202113658240
• NII論文ID: 120002828490
• NII書誌ID: AA11538976
• ISSN: 10960856
• HANDLE: 2433/137555
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles