| Autor: |
Bonavito, N. L., Yeh, K. C., Stewart, K. P., Inguva, R., Hurley, E. J. |
| Zdroj: |
Applied Optics; May 1990, Vol. 29 Issue: 13 p1919-1923, 5p |
| Abstrakt: |
The Burg algorithm for maximum entropy power spectral density estimation is applied to a time series of data obtained from a Michelson interferometer and compared with a standard fast Fourier transform (FFT) estimate for resolution capability. The propane transmittance spectrum was estimated by use of the FFT with a 2^18-data sample interferogram, giving a maximum unapodized resolution of 0.06 cm^−1. This estimate was then interpolated by zero filling an additional 2^18 points, and the final resolution was taken to be 0.06 cm^−1. Comparison of the maximum entropy method (MEM) estimate with the FFT was made over a 45-cm^−1 region of the spectrum for several increasing record lengths of interferogram data beginning at 210. It is found that over this region of 45 cm^−1, the MEM estimate with 216 data samples is in close agreement with the FFT estimate using 2^18 samples. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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