| US 7,483,338 B2 | ||
| Ultrasonic locator system and method | ||
| Guy Drouin, Neufchatel (Canada); Jean-Marc Piuze, Val Belair (Canada); and Frederic Landry, St-Emile (Canada) | ||
| Assigned to Gencsus, Schenectady, N.Y. (US) | ||
| Filed on Dec. 12, 2003, as Appl. No. 10/733,439. | ||
| Prior Publication US 2005/0128099 A1, Jun. 16, 2005 | ||
| Int. Cl. H04B 1/02 (2006.01) | ||
| U.S. Cl. 367—137 [340/825.49] | 15 Claims |
| 1. An ultrasonic transmitter capable of functioning as an electronic badge, the ultrasonic transmitter comprising:
a frequency oscillator operating at an ultrasonic frequency;
a microcontroller assembly having an encoder capable of encoding a predetermined value, a serializer capable of serializing
the encoded value, a parity encoder between the encoder and the serializer, and a micro-modulator capable of micro-modulating
the serialized encoded value using the ultrasonic frequency; and
an ultrasonic transducer capable of transmitting the encoded value as a micro-modulated ultrasonic signal.
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