Interference with authorized wireless communications
Radio jamming is the deliberate blocking of or interference with wireless communications.[1][2] In some cases, jammers work by the transmission of radio signals that disrupt telecommunications by decreasing the signal-to-noise ratio.[3]
The concept can be used in wireless data networks to disrupt information flow.[4] It is a common form of censorship in totalitarian countries, in order to prevent foreign radio stations in border areas from reaching the country.[3]
Vietnamese siren jammer trying to jam Radio Dap Loi Song Nui, an anti-government and communist radio station
Jamming is usually distinguished from interference that can occur due to device malfunctions or other accidental circumstances. Devices that simply cause interference are regulated differently. Unintentional "jamming" occurs when an operator transmits on a busy frequency without first checking whether it is in use, or without being able to hear stations using the frequency. Another form of unintentional jamming occurs when equipment accidentally radiates a signal, such as a cable television plant that accidentally emits on an aircraft emergency frequency.
^https://apps.fcc.gov/edocs_public/attachmatch/DA-12-347A1.pdf Enforcement Advisory No. 2012-02 FCC Enforcement Advisory Cell Jammers, GPS Jammers, and Other Jamming Devices Consumer Alert: Using or Importing Jammers is Illegal
^Arif, Mohammad; Shakoor, Abdul (2024-02-01). "Clustered jamming and antenna beam-width fluctuations for UAV-assisted cellular networks". Computer Networks. 240: 110171. doi:10.1016/j.comnet.2024.110171. ISSN 1389-1286.
^ abBerg, Jerome S. (2008). Broadcasting on the Short Waves, 1945 to Today. McFarland. pp. 46–. ISBN 978-0-7864-5198-2. Retrieved 17 February 2013.
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