Resources Contact Us Home
Acquisition system for continuous-wave frequency modulation object detector

Image Number 10 for United States Patent #4200871.

A continuous-wave frequency-modulation active radiometric target seeking device performs search, acquisition, and tracking functions. A technique is provided for target range discrimination and recognition using a pair of narrow band i.f. filters also improving both signal-to-clutter ratio and signal-to-receiver noise ratio. Target search is accomplished with simultaneous and synchronized range and antenna azimuth scanning with range bins effectively swept across the target by variably modulating the transmitted carrier frequency. Recognition of a substantially point target is achieved by a bipolar pulse discriminator responsive to the i.f. filter pair. Upon target acquisition, tracking is maintained by imposing a high frequency dither upon the modulation frequency in a closed loop control using only a single i.f. filter.

  Recently Added Patents
Display screen with graphical user interface
Associating objects in databases by rate-based tagging
Traffic flow analysis mitigation using a cover signal
Systems and methods for cryopreservation of cells
Authorization method for location based services
Methods for measuring media performance associated with adjacent track interference
State detection device, electronic apparatus, measurement system and program
  Randomly Featured Patents
Constant sine bar
Internal combustion engines
Method of making a semiconductor memory device
Hinge assembly for a foldable electronic device
Shovel type game machine
Capped machine nut and method of manufacture
Advanced voicemail features without carrier voicemail support
Dignified broad footprint beach wheelchair
Conditioning roll biasing mechanism
Hand manipulative aquatic toy