ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Signals acquired with a laser fluorosensor are composed of the fluorescence of the object and noises. The average of n signals theoretically has the signal-to-noise ratio (S/N) which is (square root of)n times higher than the S/N of the single signal, provided that the fluorescence remains constant from signal to signal and that the noises are independent of each other. In practice, the sources of noise in the signals are often correlated with each other, leading to S/N improvement below the theoretical one. In this paper a procedure is proposed and applied in a laser fluorosensor to obtain better S/N. It is shown that the average signal can have better S/N if the signals with the correlated noises are selectively discarded by averaging many signals. This procedure can be advanced for improving S/N of any multi sample averager.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1143297
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