| Autor: |
Wolff, S. S., Gastwirth, J. L. |
| Zdroj: |
Journal of the Acoustical Society of America; 1966, Vol. 39 Issue 6, p1258-1258, 1p |
| Abstrakt: |
In the two-input polarity coincidence correlator (PCC), the two data channels are hard-limited before they are correlated. As a threshold detector for underwater acoustic signals, the PCC has the desirable property that (under certain assumptions) its false-alarm rate is independent of the noise-probability distribution, including the commonly occurring situation of time-varying average noise power. One disadvantage of the PCC is that it is not robust; that is, for a given noise distribution, its performance relative to the best-possible correlator for that distribution depends strongly on the distribution. In this paper, we derive the optimum two-input correlator for a given noise distribution and then propose two devices that are more robust than the PCC. These robust correlators have the property that their performance is relatively uniform over a large class of noise distributions. Implementation of these devices requires that the noise power be estimated. Sequential methods of accomplishing this are given. [Work supported by the U. S. Office of Naval Research.] [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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