1. IEEE 802.11ah: sub-1-GHz license-exempt operation for the internet of things;Park;Comput. Commun.,,2015
2. Title 47 of the Code of federal regulations, Part 15 on radio frequency devices,2017
3. European Conference of Postal and Telecommunications Administrations (CEPT). Available from: http://www.cept.org/cept/.
4. ERC recommendation 70-03, relating to the use of short-range devices (SRD);CEPT Electronic Communications Committee (ECC),2016
5. EN 300 220-1 V3.1.1, short range devices (SRD) operating in the frequency range 25 MHz to 1 000 MHz; Part 1: technical characteristics and methods of measurement,2017