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US 9,319,096 B1Granted
Ultrasonic communication between devices
AssigneeGoogle Inc.
InventorsRyan Michael Rifkin, Richard Francis Lyon, Pascal Tom Getreuer
Life of this patent
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Abstract
Implementations generally relate to ultrasonic communication between devices. In some implementations, a method includes receiving a data signal, where the data signal is transmitted and received in an indoor environment. The method further includes demodulating the data signal based on direct sequence spread spectrum.
Claims15
A method comprising:
- receiving a data signal, wherein the data signal is transmitted and received in an indoor environment;
- and
- demodulating the data signal based on direct sequence spread spectrum, wherein the demodulating of the data signal comprises:
- detecting a first symbol of the data signal;
- partitioning the first symbol into a plurality of chunks;
- approximating cross-correlation of each chunk, wherein the approximating is based on the partitioning of the first symbol into the plurality of chunks;
- downconverting the data signal;
- and
- despreading the downconverted data signal.
6 more elements
A system comprising:
- one or more processors;
- and
- logic encoded in one or more tangible media for execution by the one or more processors and when executed operable to perform operations comprising:
- receiving a data signal, wherein the data signal is transmitted and received in an indoor environment;
- and
- demodulating the data signal based on direct sequence spread spectrum, wherein the demodulating the data signal comprises:
- detecting a first symbol of the data signal;
- partitioning the first symbol into a plurality of chunks;
- approximating cross-correlation of each chunk, wherein the approximating is based on the partitioning of the first symbol into the plurality of chunks;
- downconverting the data signal;
- and
- despreading the downconverted data signal.
9 more elements
Dependencies are inferred from the claim text.