Resources Contact Us Home
Radar arrangement

Image Number 3 for United States Patent #5109231.

A radar system comprises a transmitter which essentially continuously transmits a modulated carrier wave signal and a receiver for receiving the carrier wave signal reflected at an object (echo signal). The carrier wave signal is modulated with a code-generating signal whose code frequency is determined for the range resolution of the radar. The code-generating signal is such that one bit in the code has a duration which is several times longer than the period of the carrier wave signal and several bits of the code form a block which is obtained by modulation of a carrier wave with constant frequency. The frequency of the carrier wave is changed between blocks so that the transmitter sends a block with a carrier wave frequency which is different from the carrier wave frequency or frequencies which the receiver is set up to receive. The receiver stores the transmitted code and correlates it with the received signal. When code correspondence (synchronism) is obtained this corresponds to a definitive position of the echo response reflector. By changing frequency between blocks different "types of radar" can be dedicated to different range zones, and a radar system is obtained which is adapted to cope with modern threat environments. The radar is difficult to spot, difficult to define and to disturb.

  Recently Added Patents
Disk drive to enable defect margining
Solar cell using polymer-dispersed liquid crystals
Architecture, system and method for testing resistive type memory
Display screen or portion thereof with graphical user interface
Automatic baroreflex modulation responsive to adverse event
Control method of LPI lamp for LPI vehicle and logic therefor
  Randomly Featured Patents
Battery terminal connector
Vertical axis rotor-type wind turbine
Modified ESAT-6 molecules and improved vaccine strains of Mycobacterium bovis BCG
Vehicle control system
Lamp support arm
Air ionizing ring
Apparatus for changing the direction of rotation of a rotating shaft
Video store and forward on demand apparatus and method
Method and apparatus for hybridization
Light emitting diode