@article{chung_short_2018,
	title = {Short distance data transmission method using inaudible high-frequencies between smart devices},
	issn = {1018-4864, 1572-9451},
	url = {http://link.springer.com/10.1007/s11235-018-0497-2},
	doi = {10.1007/s11235-018-0497-2},
	abstract = {Because wireless communications with inaudible high-frequency signals are used in limited areas due to their low speed, this paper proposes a data communications method using the on–off keying technique and inaudible high-frequency sound signals for speed improvement. The proposed method can be used to send multiple bits simultaneously by mixing specific frequencies that are mapped to each bit. To identify data-transmission errors due to interference from nearby frequency signals, we used the cyclic redundancy check technique. We built applications, tested performance in terms of data-transmission speed and accuracy, and compared the results with those of the existing system. At the setting that showed the highest data transmission, our system sent 40 bits of data in 92 ms, 30 times faster than the existing system, and detected every error. This method can be applied to various environments by changing variables and can be used to send a large amount of data with high accuracy compared to the existing system. Therefore, wireless communications with inaudible high-frequency signals that are used in only limited areas because of low speed will now be able to be utilized in more diverse areas.},
	language = {en},
	urldate = {2018-11-21},
	journal = {Telecommunication Systems},
	author = {Chung, Myoungbeom},
	month = aug,
	year = {2018},
	note = {00000}
}

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