Pre-processing for the optical feedback self-mixing interferomitric signal
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Corresponding author:
YU Yan-guang, yanguangyu@zzu.edu.cn
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Received Date:
2007-03-06
Accepted Date:
2007-04-20
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Abstract
For improving the precision of the parameter estimate,a set of pre-processing methods including filtering and normalization were proposed for the initial experimental signal according to the characteristics of the optical feedback self-mixing interference signal.The proposed approach implements filtering of noise effectively and flat the signal.The pre-processed OFSMI experimental signal tallied much with the theoretic signal.Estimating parameters using the initial and the pre-processing signal separately,comparison results show that the latter can make the accuracy of the line width spreading factorand the optical feedback level factor C improve by 5.52% and 4.55% respectively.
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