Public frequency bands are crowded enough without private corporations crowding the spectrum by spilling over from neighboring bands.

Case in point, 3G frequency in Canada now has numerous centers between 1.7 - 2.2 GHz. This however has roll-off on either side, and side bands which spill in to other bands. For telco equipment which is not effectively tuned, of certain caliber, or filtered, this can render open public bands severely degraded, or nearly useless. That is, modern interference fighting Bluetooth, DECT6.0, and WiFi can all be rendered inoperable or significantly limited by an unreasonably high noise floor.

  • What are the regs regarding acceptable roll-off/side band transmission from licensed spectrum?
  • Are there avenues of recourse?
  • Can we build a device to quantify and identify impeding sources and levels?
  • Can we quantify the amount of spectrum lost city/province/country-wide due to such practices?

http://en.wikipedia.org/wiki/UMTS_frequency_bands 3G MHz in Canada 1850 - 1910 1930 - 1990 1710 - 1755 2110 - 2155

http://en.wikipedia.org/wiki/Digital_Enhanced_Cordless_Telecommunications#Technical_properties DECT 6.0 in Canada 1920 MHz–1930

http://www.umtsworld.com/technology/frequencies.htm