Resources Contact Us Home
Frequency interrupt continuous transmit active sonar transmission and signal processing technique

Image Number 10 for United States Patent #5150335.

In a time continuous transmit active sonar system the frequency of the transmitted waveform is interrupted at predetermined intervals so that a frequency discontinuity in the transmitted waveform occurs at each interruption. The starting and ending frequencies at the beginning and end of the interruptions provide indications for properly resolving the range/Doppler ambiguity that is inherent in prior continuous transmit sonar systems. The transmitted signal may be frequency modulated. Further, the frequency of the transmitted waveform may be rapidly changed and/or multiple frequency waveforms may be transmitted within the same time interval. An existing passive sonar detection system may be modified to include an active continuous transmit sonar system whose echo returns may be processed by the passive system, thereby achieving benefits over conventional active pulsed sonar systems.

  Recently Added Patents
Configurable memory controller/memory module communication system
Para-xylylene based microfilm elution devices
Generating a representation of an object of interest
Power management implementation in an optical link
Method for manufacturing a substrate for a display device
Tactile output device for computing device notifications
Systems and methods for selective text to speech synthesis
  Randomly Featured Patents
Device and method for separating and aligning sheets in a sheet feeder of a printing machine
Method and apparatus for drying brine shrimp cysts
Method and system for identification of changes in fluids
Immobilization of Streptokinase
Electric motor
Method for removal of bulk metal contamination from III-V semiconductor substrates
Garbage can
Blender with feed rate control
Therapeutic virginiamycin M.sub.1 analogs
Diagnosis and management of infection caused by Chlamydia