Sub-bottom high resolution sonar utilizing non-linear acoustic pulse self-demodulation
Eyman, Roy Lance
LeStrange, Peter John
Seemann, Axel Harry
Sackman, G. L.
MetadataShow full item record
An experiment involving the design and construction of a prototype sub-bottom high resolution sonar system utilizing nonlinear pulse self- demodulation and suitable for deep water use is described. It is possible to generate a low frequency wave using the self-demodulation of a short, high frequency, finite amplitude pulse produced by the non-linear properties of the medium. The generated low frequency wave will theoretically have the high directivity of the primary wave while simultaneously possessing the bottom penetrating characteristics of the lower frequency. Measurements demonstrate that the pulse self-demodulation occurs as theoretically predicted, and the results are successfully applied to the design of the sonar system. Shallow water tests demonstrating the potential effectiveness of the sonar system for detection and classification of target objects in bottom sediments are also described.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Sielbeck, Stephen L. (Monterey, California. Naval Postgraduate School, 1991-09);Current meter data were collected from moorings on the 800 and 1800 m isobaths on the continental slope off Point Sur, California at 100, 350, and 500 m depth and at 1000 m depth on the 1800 m isobath. Complex demodulation ...
Development of a receiver processor for UAV video signal acquisition and tracking using digital phased array antenna Kaya, Fevzi Aytac (Monterey, California. Naval Postgraduate School, 2010-09);Air dominance is a key factor concerning today's warfare. Obtaining air dominance requires having a high degree of situational awareness. Unmanned aerial vehicles (UAVs) have gained popularity for surveillance and ...
Hui, Kok Meng Edmund (Monterey California. Naval Postgraduate School, 2007-12);The purpose of this research is to design a digital phased array for receiving and tracking a 2.4 GHz FM video signal from an unmanned air vehicle. The tracking is done using a monopulse technique. Various numbers of ...