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| Titel |
Fractional baud-length coding |
| VerfasserIn |
J. Vierinen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 29, no. 6 ; Nr. 29, no. 6 (2011-06-30), S.1189-1196 |
| Datensatznummer |
250017053
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| Publikation (Nr.) |
 copernicus.org/angeo-29-1189-2011.pdf |
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| Zusammenfassung |
| We present a novel approach for modulating radar transmissions in
order to improve target range and Doppler estimation accuracy. This is
achieved by using non-uniform baud lengths. With this method it is
possible to increase sub-baud range-resolution of phase coded radar
measurements while maintaining a narrow transmission bandwidth. We
first derive target backscatter amplitude estimation error covariance
matrix for arbitrary targets when estimating backscatter in amplitude
domain. We define target optimality and discuss different search
strategies that can be used to find well performing transmission
envelopes. We give several simulated examples of the method showing
that fractional baud-length coding results in smaller estimation
errors than conventional uniform baud length transmission codes when
estimating the target backscatter amplitude at sub-baud range
resolution. We also demonstrate the method in practice by analyzing
the range resolved power of a low-altitude meteor trail echo that was
measured using a fractional baud-length experiment with the EISCAT UHF
system. |
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