UWCLASSltx^D 



Security Classification 



DOCUMENT CONTROL DATA - R&D 



(Security clm»mHtcmtton ol title, body ot abstract and indexing annotation must be entered when the overall report ia claaalfled) 



1 ORIGINATING ACTIUCY (Corporate author) 



Naval Avionics Facility 

 Indianapolis, Indiana ^6218 



2« REPORT SECURI TY CLASSIFICATION 



UNCLASSIFIED 



26 GROUP 



3. REPORT TITLE 



OPTBttZiVTION OF CO]WE[WTIONAL PASSIVE SONAE DETECTION SYSTEMS 



4 DESCRIPTIVE NOTES (Type ol report and Inclualve dates) 



Technical Report 



S AUTHORCS; (Lmat name. Ilrst name. Initial) 



WHELCHEL, Robert J. 



6 REPO RT DATE 



26 June 1969 



7a TOTAL NO OF PAGES 



if8 



7b NO OF REFS 



18 



8a. CONTRACT OR GRANT NO. 



b. PROJECT NO 



9a ORIGINATOR'S REPORT NUMBERCS; 



TR-ll+Uo 



9 6. OTHER REPORT NOCS; (A ny other numbera that may be ma at gned 

 thia report) 



10 AVAILABILITY/LIMITATION NOTICES 



This document has been approved for public release and sale; its distribution 

 is unlimited. 



11 SUPPLEMENTARY NOTES 



12 SPONSORING MILITARY ACTIVITY 



13 ABSTRACT 



This report examines three methods for maximizing the output signal-to-noise 

 ratio of a conventional passive detection system consisting of a fixed array, 

 non-adaptive beam forming, and square-law detection. The performance of a 

 non-optimal system is compared to each of the three optimum configurations, 

 and the results suggest how an imsophisticated, sub-optimal system, which has 

 only marginally poorer performance than the opt-imtun systems, can be designed. 



DD /.?n"'J. 1473 



0101-807-6800 



UNCLASSIFIED 



Security Classification 



