Re: cell phone jamming
Carbon_Rod, Thu Mar 16 2017, 08:56AM

Most LTE networks use the same bands as the old cell networks. Note too, that the telecoms managed to win commercial usage rights for formally public upper WiFi bands as well. So there's a possibility of running your own LTE base-station, and not necessarily violate FCC rules.

However, interfering with service will have the FCC Fox Hunters (or annoyed ARRL members) after you fairly quickly given the other stations naturally triangulate carrier signal location by default (better than GPS in cities). There is also the constant flow of other users into the broadcast area, and link loss without hand-off would form a fairly good picture of the marked broadcast lobe/circle shadow. Avoid the FCC fines, and remember people have gone to jail for joke devices interfering with user emergency services.

Wideband LTE MIMO multi-polarization naturally handles interference well, and unlike old GSM protocols includes encryption to resist targeted link tampering.

Re: cell phone jamming
Mads Barnkob, Thu Mar 16 2017, 02:05PM

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Reference:

Jamming Cell Phones and GPS Equipment is Against the Law

In recent years, the number of websites offering “cell jammers” or similar devices designed to block communications and create a “quiet zone” in vehicles, schools, theaters, restaurants, and other places has increased substantially. While these devices are marketed under different names, such as signal blockers, GPS jammers, or text stoppers, they have the same purpose. We remind and warn consumers that it is a violation of federal law to use a cell jammer or similar devices that intentionally block, jam, or interfere with authorized radio communications such as cell phones, police radar, GPS, and Wi-Fi. Despite some marketers’ claims, consumers cannot legally use jammers within the United States, nor can retailers lawfully sell them.

News Release: FCC Enforcement Bureau Steps Up Education and Enforcement Efforts Against Cellphone and GPS Jamming. [Word | PDF]

Advisory: Retailers Advised that the Marketing or Sale of Devices Designed to Block, Jam, or Interfere with Authorized Radio Communications Is Strictly Prohibited in the U.S. Enforcement Bureau Takes Action Against the Retail Sale of Jammers. [Word | PDF]

Advisory: CONSUMERS BEWARE: It is Unlawful to Use “Cell Jammers” and Other Equipment that Blocks, Jams, or Interferes with Authorized Radio Communications in the U.S. [Word | PDF]

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