SYSTEM FOR PROVIDING IMPROVED REVERBERATION LIMITED SONAR PERFORMANCE
Assignee
US Government
Filed as: UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE NAVY THE
Filed
Oct 1, 1984
Granted
Mar 5, 1991
Location
OLD LYME CT US
Abstract
Apparatus and method for providing increased gains in detection and classcation of active sonar targets while concurrently preventing target cognizance of detection. Operation starts with transmission of a sequence of FM slides as subpulses alternately up slide, down slide, up slide, etc., while varying randomly the start frequency of each. Subpulse lengths short enough to avoid overlap of echoes from multiple major reflectors are used. Each slide is started at a randomized frequency. Just enough bandwidth is used on each slide to achieve the range resolution desired for searching. Considering only the individual subpulse bandwidth, subpulses are transmitted throughout the systems total bandwidth. Enough subpulses are transmitted to achieve the bandwidth/time product desired for searching.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Dec 2, 1987
Rescinded
May 4, 1990
Duration
2 years, 5 months
Inventor
- 1MICHAEL M. HUNDT
Record Details
- Patent number
- US 4998224
- Application
- 06700984
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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