direction location
4.Passive location techniques include location of object by virtue of another emitter source and location of emitter source. Passive location technique has been playing an important role in navigation, aviation, aerospace and electronic warfare. In this thesis, detail analysis and comparison of the geometrical dilution of position (GDOP) of single and multi-station location, direction of arrival (DOA), DD-DOA joint location.
10.Using Micro Controlled Unit At89C52 to control the direction of the automatic motor-driven car,and using the Pulse Width Modulation technology to control the speed of the motor. The location and distance of the car are detected by the infrared rays photoelectric detector,the running time and distance of the car are also displayed with digital model meantime.

