Resources Contact Us Home
Method of operating a continuous wave sonar system

Image Number 3 for United States Patent #6128249.

An improved method is provided for operating a continuous wave sonar syst At time of transmission, a plurality of acoustic pulses are transmitted one right after another. Each pulse has a unique frequency and is of a time duration that is approximately one second long. The pulses are characterized by a separation frequency representing a difference in frequency between numerically successive frequencies. However, the pulses are staggered with respect to frequency. In the preferred embodiment, each successively transmitted one of the pulses is separated in frequency from an immediately preceding transmitted one of the pulses by an amount greater than the separation frequency. These multiple pulses seperated in time and in frequency, reduce the effects of frequency speading caused by the medium, resulting in a sonar with enhanced detection performance.

  Recently Added Patents
System and method for multi-threaded MIMO OFDM channel equalizer
Packet bundling at the PDCP layer
Solar powered charging shelter and system and method thereof
Systems and methods for detailed error reporting in data storage systems
Portable communication terminal, communication method and control program
Preserving user applied markings made to a hardcopy original document
Reliable event broadcaster with multiplexing and bandwidth control functions
  Randomly Featured Patents
Mat for reducing the disturbance of particulate matter and liquids by wind
Lens with IR-cut function
Surgical cuff
Plug connector
Dispenser including array of liquid dispensing elements
Light source module arranged in an image scanning device for scanning a transparent object
Clock synchronization device
Methods and apparatus for remote Raman and laser-induced breakdown spectrometry
System for evaluating the productivity of a working machine and its driver
Anisotropic semiconductor film and method of production thereof