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dc.contributor.authorZiomek, Lawrence J.
dc.contributor.authorSibul, Leon H.
dc.date.accessioned2018-09-19T16:25:17Z
dc.date.available2018-09-19T16:25:17Z
dc.date.issued1982
dc.identifier.citationThe Journal of the Acoustical Society of America 72, 804 (1982); doi: 10.1121/1.388260en_US
dc.identifier.urihttp://hdl.handle.net/10945/59965
dc.descriptionThe article of record as published may be found at https://doi.org/10.1121/1.388260en_US
dc.descriptionThis paper is based on Chaps 3. and 4 of L.J. Ziomek's Ph.D. dissertation "A Scattering Function Approach to Underwater Acoustic Detection and Signal Design, "The Pennsylvania State University (1981).en_US
dc.description.abstractSignal‐to‐interference ratio (SIR) expressions for a doubly spread target are derived for both broadband and narrow‐band transmit signals. For broadband signals, the SIR is dependent upon target and reverberation two‐frequency correlation functions and upon the transmit and processing waveforms. For wide‐sense stationary uncorrelated spreading (WSSUS) communication channels (which implies narrow‐band transmissions), the SIR is dependent upon target and reverberation scattering functions and the cross‐ambiguity function of the transmit and processing waveforms. Volume reverberation and target two‐frequency correlation functions and scattering functions are derived. Volume reverberation is modeled as the spatially uncorrelated scattered field from randomly distributed point scatterers in deterministic plus random translational motion. A single scattering approximation is used and frequency‐dependent directivity functions and attenuation due to absorption are included. A probability density function of random Doppler shift due to the random motion of the scatterers is also derived. Computer plots of the density function are presented as a function of the standard deviation of the random motion. The target is modeled as a linear array of discrete highlights in deterministic translational motion. Example scattering function calculations are presented. The volume reverberation scattering function predicts Doppler spreading as a function of both beam steering angle and random motion of the scatterers. The target scattering function also predicts a spread in Doppler values. Both scattering functions predict time spread and/or contraction as a function of Doppler spread.en_US
dc.description.sponsorshipThe work described in this paper was supportedby NAVSEA Undersea Weapons Guidance and Control Block, Code NSEA 63R- 14.en_US
dc.publisherAcoustical Society of Americaen_US
dc.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.en_US
dc.titleBroadband and narrow‐band signal‐to‐interference ratio expressions for a doubly spread targeten_US
dc.typeArticleen_US
dc.contributor.departmentElectrical Engineeringen_US


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