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
Data security for dynamic random access memory using body bias to clear data at power-up
Normalized contextual performance metric for the assessment of fatigue-related incidents
Masking method and apparatus
Image processing apparatus, image registering method, program causing computer to execute image registering method, and recording medium in which program is recorded
Error recovery storage along a memory string
Method for implementing dynamic pseudorandom keyboard remapping
Audio signal clip detection
  Randomly Featured Patents
Infant swimwear with inflatable waist and leg portions
Method of establishing a unique machine independent reference frame for the eye
Clamping fastener grip length indicator
Method of forming a contoured orthotic member
Alignment key for a semiconductor device having a seal against ionic contamination
Temporary heart-assist system
Collection assembly
Apparatus for processing dispersions of solids in a fatty phase
Fabric plant container
Filament winding apparatus