Accession Number:

AD0843988

Title:

Processing of Data from Sonar Systems, Volume 6

Descriptive Note:

Corporate Author:

GENERAL DYNAMICS GROTON CT ELECTRIC BOAT DIV

Personal Author(s):

• Hill, Jr., Francis S.
• Lewis, John B.
• MacDonald, Verne H.
• Schultheiss, Peter M.

Report Date:

1968-09-01

Pagination or Media Count:

452.0

Abstract:

Volume VI deals with passive detection and target location, signal design, and optimum passive bearing estimation. Using a linear array, the problem of passive detection and target location was analyzed for the case of stationary Gaussian signals and noises with known statistical properties. A comprehensive treatment of this problem is presented. The problem of sonar signal design is considered, with primary interest centered on redesign of the pulse waveshape based on information gained from an earlier return. Results indicate that, in principle, some improvements are possible. In the problem of target location, an arbitrary number of hydrophones, arbitrarily spaced on a linear array, were studied in this report, as compared to an earlier report which studied a two-element array. Lower bounds are set on the rms bearing error attainable with a linear array and the results compared with the rms error of a split beam tracker which is modified by the insertion of an appropriate spectrum-shaping filter into each array half. Under the given circumstances, the split beam tracker is very nearly optimal instrumentation.

Descriptors:

• *SONAR ARRAYS
• *SONAR SIGNALS
• ADAPTIVE SYSTEMS
• BANDWIDTH
• DATA PROCESSING
• HYDROPHONES
• INFORMATION THEORY
• NOISE
• OPTIMIZATION
• POSITION FINDING
• REVERBERATION
• SIGNAL TO NOISE RATIO
• SONAR TARGETS
• STOCHASTIC PROCESSES

Subject Categories:

• Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE