Document Detail


High-range-resolution velocity-estimation techniques for coherent Doppler lidars with exponentially shaped laser pulses.
MedLine Citation:
PMID:  11921805     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
On the basis of an analysis of the autocovariance of the complex heterodyne signal, some novel algorithms are derived and investigated for recovering the nonuniform Doppler-velocity coherent-lidar profiles within the lidar resolution interval conditioned by the sensing laser-pulse length. The case of exponentially shaped sensing laser pulses is considered. The algorithm performance and efficiency are studied and illustrated by computer simulations (based on the use of pulse models and real laser pulses), taking into account the influence of additive noise and radial-velocity fluctuations. It is shown that, at some reasonable number of signal realizations used and with appropriate data processing to suppress the noise effects, the Doppler-velocity profiles can be determined with a considerably shorter resolution interval in comparison with that (usually accepted as a lower bound) determined by the pulse length.
Authors:
Ljuan L Gurdev; Tanja N Dreischuh; Dimitar V Stoyanov
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied optics     Volume:  41     ISSN:  0003-6935     ISO Abbreviation:  Appl Opt     Publication Date:  2002 Mar 
Date Detail:
Created Date:  2002-03-29     Completed Date:  2002-04-11     Revised Date:  2003-11-03    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1741-9     Citation Subset:  -    
Affiliation:
Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Shosse Boulevard, 1784 Sofia, Bulgaria. lugurdev@ie.bas.bg
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