Enhancement of the Nuclear Spin Noise Signal Using Wavelet Transform
| Autor: | D. Adilakshmi, Kousik Chandra, K. V. Ramanathan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Discrete wavelet transform
Physics Spins Noise (signal processing) Wavelet transform 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Signal Thresholding Atomic and Molecular Physics and Optics 0104 chemical sciences Computational physics Wavelet Physical and Theoretical Chemistry 0210 nano-technology Spin (physics) |
| Zdroj: | ChemPhysChem. 20:456-462 |
| ISSN: | 1439-7641 1439-4235 |
| Popis: | Spin noise spectroscopy has attracted considerable attention recently owing partly to intrinsic interest in the phenomenon and partly to its significant application potential. Here, we address the inherent problem of low sensitivity of nuclear spin noise and examine the utility of wavelet transform to mitigate this problem by distinguishing real peaks from the noise contaminated data. Suppression of the random circuit noise and the consequent enhancement of the correlated nuclear spin noise signal have been demonstrated with discrete wavelet transform. Spectra of both 1 H and 13 C nuclear spins have been considered and significant signal enhancements in both the cases have been observed. A detailed analysis of several possible wavelet, thresholding and decomposition solutions have been made to obtain the optimum condition for signal enhancement. It is observed that the application of wavelet transform leaves the spin noise signal line shape essentially unchanged, which is an advantage for several applications involving spin noise spectra. |
| Databáze: | OpenAIRE |
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