Transmission of data by ultrasound

Details Transmission of data by ultrasound Transmission of data by ultrasound

2005-09-27

2005-09-27

Perez-Gutierrez, Rafael (Department: 2686)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S074100, C455S073000, C455S550100, C455S552100, C341S155000, C370S342000, C370S441000, C375S130000, C375S140000, C375S146000

Reexamination Certificate

active

06950681

ABSTRACT:
An ultrasonic transmission system in which, for the purpose of transmission, a signal is used which generates a broadband signal by means of code spreading and is capable of eliminating any echoes by means of correlation. The transmission system exhibits a transmitter and a receiver. In this configuration, digital information is spread to a great bandwidth in accordance with a CDMA technique, D/A converted and then transmitted by means of ultrasound via an air Preferred applications of the present invention are air interfaces having a length of a few meters. One field of application is, for example, the connection of cordless handsets or hands-free telephones to telephones.

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