1. [1] Federal Communications Commission (FCC), “Electronic Code of Federal Regulations, Part 15, Subpart F: Ultra-Wideband Operation,” https://www.ecfr.gov/cgi-bin/text-idx?SID=931260b9a74c79c80366a265e66f61db&mc=true&node=pt47.1.15&rgn=div5
2. [2] Association of Radio Industries and Businesses (ARIB), “ARIB STD-T91 UWB (Ultra-WideBand) Radio Systems,” https://www.arib.or.jp/english/std_tr/telecommunications/std-t91.html
3. [3] European Telecommunications Standards Institute (ETSI), “EN 302 065-2 V2.1.1, Short Range Devices (SRD) using. Ultra Wide Band technology (UWB),” https://www.etsi.org/deliver/etsi_en/302000_302099/30206502/02.01.01_60/en_30206502v020101p.pdf
4. [4] http://www.miit.gov.cn/newweb/n1146285/n1146352/n3054355/n3057735/n3057748/n3057752/c3653822/content.html
5. [5] http://www.ieee802.org/15/