Provider: ingentaconnect
Database: ingentaconnect
Content: application/x-research-info-systems
TY - ABST
AU - Bialkowski, Stephen E.
TI - Overcoming the Multiplex Disadvantage by Using Maximum-Likelihood Inversion
JO - Applied Spectroscopy
PY - 1998-04-01T00:00:00///
VL - 52
IS - 4
SP - 591
EP - 598
KW - MAXIMUM LIKELIHOOD ESTIMATION SHOT NOISE QUANTUM NOISE FT-IR MULTIPLEX DISADVANTAGE
N2 - A maximum-likelihood estimator, derived under quantum-noiselimited measurement conditions, is used to obtain wavenumber-ordered spectra produced by a model Michelson interferometer. The estimator is tested
on a number of synthetic interferograms, and results are compared to similar spectra obtained by using the Fourier (cosine) transform. It is found that the maximum-likelihood inversion method does not result
in white noise in the spectrum estimate when the spectrum is sparse. It thus may be used to circumvent the main disadvantage in multiplexed spectrometer measurements using quantum-noise-limited detectors
for emissionbased measurements. It is also found that maximum-likelihood inversion methods can be used to obtain spectrum estimates with greater peak-width resolution than those found by using Fourier transforms.
The methods produce optical spectrum estimates that are relatively free of artifacts associated with the Fourier transform. The method is extended to include measurements with both quantum noise and additive
white noise. Results obtained by using the quantum-noise-limited and normal noise maximum-likelihood spectrum estimation methods suggest that both the multiplex-disadvantage and the Gibbs phenomenon effects
may be reduced by limiting the parameter space. The main problem with the maximum-likelihood method is the relatively long times required to obtain spectrum estimates.
UR - http://www.ingentaconnect.com/content/sas/sas/1998/00000052/00000004/art00017
M3 - doi:10.1366/0003702981943923
UR - http://dx.doi.org/10.1366/0003702981943923
ER -