A. Minato, Jiayu Liu, Fuhui Guo, Masanori Itaba, S. Ozawa
{"title":"Sound Communication System of LED Using Maximum Length Sequence","authors":"A. Minato, Jiayu Liu, Fuhui Guo, Masanori Itaba, S. Ozawa","doi":"10.2150/JLVE.36.54","DOIUrl":null,"url":null,"abstract":"We are developing sound communication system. Modulated LED light is transformed to electromagnetic wave and received by AM radio. Our previous modulation technique has small peaks at AM frequency region. The small peaks cause trouble when multiple sound sources are used with different AM frequencies. We propose new modulation techniques having no small peaks. Power spectrum and sound quality are compared between our modulation techniques.","PeriodicalId":311488,"journal":{"name":"Journal of Light & Visual Environment","volume":"42 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Light & Visual Environment","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2150/JLVE.36.54","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We are developing sound communication system. Modulated LED light is transformed to electromagnetic wave and received by AM radio. Our previous modulation technique has small peaks at AM frequency region. The small peaks cause trouble when multiple sound sources are used with different AM frequencies. We propose new modulation techniques having no small peaks. Power spectrum and sound quality are compared between our modulation techniques.
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