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US 8,942,298 B2Granted
Data communications
AssigneeSonitor Technologies AS
InventorsSverre Holm, Rune Holm
Life of this patent
Estimating the term…
Abstract
Data communication apparatus comprising transmission means adapted to transmit data as the ratio of pairs of frequencies between objects that are moving relative to one another. It is particularly applicable to acoustic data communications at ultrasound frequencies in air.
Claims20
Data communication apparatus comprising:
- a coder adapted to receive data for transmission, and to encode a data bit or data word from the received data by identifying, from a set of frequency ratios, a frequency ratio that encodes the data bit or data word according to a predetermined coding scheme, wherein the set of frequency ratios consists of a number of frequency ratios, said number being more than two and an integer power of two;
- and
- a transmitter;
- wherein the coder is further adapted to cause the transmitter to transmit a pair of frequencies having the identified frequency ratio, thereby transmitting the coded data bit or data word.
1 more element
A method of data transmission comprising:
- using a coder to encode a data bit or data word as a signal comprising a pair of frequencies, wherein the pair of frequencies has a ratio, identified from a set of ratios, that encodes the data bit or data word according to a predetermined coding scheme, and wherein the set of ratios consists of a number of ratios, said number being more than two and an integer power of two;
- transmitting said pair of frequencies from a transmitter controlled by the coder;
- receiving said pair of frequencies at a receiver;
- determining a value of a ratio of said pair of frequencies;
- and
- decoding the data bit or data word from said ratio value.
3 more elements
Dependencies are inferred from the claim text.