Method and system for recognizing location by using sound sources with different frequencies

A location determination receiver for recognizing a location of a moving object, comprising:

• an ultrasonic antenna;
• a receiving unit capable of simultaneously processing three or more ultrasonic signals;
• a operation unit for calculating a distance from each of ultrasonic satellites transmitting each of the ultrasonic signals by using a reception of each of the ultrasonic signals;
• and
• a location determining unit for calculating a current location of the receiver by using the distance from each of ultrasonic satellites.

A system for recognizing a location of a moving object, comprising:

• a plurality of ultrasonic transmitters for transmitting an ultrasonic signal comprising different frequency respectively;
• a reference signal broadcasting device for supplying a synchronizing signal to each of the ultrasonic transmitters;
• a ultrasonic receiver for determining its own three-dimensional location by receiving the ultrasonic signals from the ultrasonic transmitters;
• a server for providing location coordinates of the plurality of the ultrasonic transmitters;
• and
• wherein the ultrasonic transmitters simultaneously transmit the ultrasonic signals in accordance with the control of a controller.