Ultrasonic communication between devices

摘要

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.

主权项

1. 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; anddespreading the downconverted data signal.