dc.contributor.author | Heine, J. | |
dc.contributor.author | Theriault, Kenneth B. | |
dc.contributor.author | Boseck, D. | |
dc.date.accessioned | 2018-10-11T14:08:39Z | |
dc.date.available | 2018-10-11T14:08:39Z | |
dc.date.issued | 1993/08 | |
dc.identifier | 11920 | |
dc.identifier.govdoc | CP-42/2 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12489/496 | |
dc.description.abstract | A noise jammer raises the noise level observed by a threat sonar to degrade the sonar's detection performance. In this paper we assess the potential for a specific noise jammer waveform used to countermeasure low frequency active sonars. This waveform is a long duration train of broadband acoustic impulses, each of which has significant low frequency energy. We describe the performance of the impulsive countermeasure on a typical active system processor implementation by comparing experimentally determined receiver operator characteristic curves for the sonar processor with and without jammer energy present. Performance was also determined as a function of pulse intervals. The pulse sequence time series input was synthesized from measurements of high intensity impulses transmitted from a range of approximately 35 Nm in a nominal half-channel environment. Required density functions were obtained from a Monte Carlo simulation involving 1()1\5 iterations of signal, jammer pulses and noise input. The time average power required for the pulse waveform to achieve a specified detection system degradation was found to be 9 dB more than that of a continuous gaussian noise waveform. | |
dc.format | 10 p. : ill., 8 fig. ; digital, PDF file | |
dc.language | English | |
dc.publisher | NATO. SACLANTCEN | |
dc.source | In: Low frequency active sonar (SACLANTCEN Conference Proceedings CP-42), vol. 2, 1993, pp. F/20-1 - F/20-10. | |
dc.subject | Acoustic countermeasures (ACM) | |
dc.subject | Low Frequency Active Sonar (LFAS) | |
dc.subject | Noise | |
dc.title | Performance assessment of broadband impulsive noise jammers | |
dc.type | Papers and Articles | |
dc.type | Conference Proceedings (CP) | |