dc.contributor.author | Abraham, Douglas A. | |
dc.date.accessioned | 2018-10-11T14:09:03Z | |
dc.date.available | 2018-10-11T14:09:03Z | |
dc.date.issued | 2000/02 | |
dc.identifier | 12434 | |
dc.identifier.govdoc | SR-303 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12489/556 | |
dc.description.abstract | Low-frequency active sonar systems operating in shallow water are primarily limited by reverberation. | |
dc.description.abstract | Reverberation is traditionally assumed to follow a Rayleigh probability distribution, from which the | |
dc.description.abstract | detector and other signal processing algorithms are developed. Experimental studies have shown that | |
dc.description.abstract | reverberation can be non-Rayleigh distributed with varying statistical character over range and | |
dc.description.abstract | bearing. In such a situation, detectors designed under a Rayleigh assumption will exhibit increased | |
dc.description.abstract | and varying false alarm performance. This report develops a technique for dealing with the unknown and varying reverberation statistics by using a non-Rayleigh reverberation model to perform a statistical normalization of the background reverberation. In this manner, range-bearing images will be | |
dc.description.abstract | produced that have a constant background reverberation distribution (i.e., Rayleigh). The technique is evaluated through simulation, with particular attention to the false alarm performance, which is seen | |
dc.description.abstract | to depend on the severity of the non-Rayleighness of the reverberation and the amount of data used | |
dc.description.abstract | to estimate the parameters of the reverberation model. Application to real data has shown that a large | |
dc.description.abstract | degree of the non-stationarity of the range-bearing image can be removed by statistical normalization. | |
dc.format | vi, 59 p. : ill. ; 23 fig. | |
dc.language | English | |
dc.publisher | NATO. SACLANTCEN | |
dc.relation.ispartofseries | ADA378075 | |
dc.subject | Acoustic reverberation | |
dc.subject | Shallow water | |
dc.subject | Target detection | |
dc.title | Statistical normalization of non-Rayleigh reverberation | |
dc.type | Scientific Report (SR) | |