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
Front face of vehicle wheel
Maize hybrid X08B748
Apparatus for providing location information of hand-held device and method thereof
Profiled rail for advertising/display units
LED light source lamp having drive circuit arranged in outer periphery of LED light source
System and method for selecting a video encoding format based on feedback data
  Randomly Featured Patents
Eyeglasses with RFID tags or with a strap
Method for the mechanical soft-soldering of heavy metals utilizing a fluxing agent
Saw sensor tags with enhanced performance
Aminothiazole substituted penicillins and antibacterial compositions thereof
Smart card, telephone comprising such a card and method for executing a command in such a card
Athletic shoe including a heel strap
Golf swing trainer
Automotive test terminal
Methods of targeting of viral entry