For the last month, I have been hearing digital noise around the VE6VHF frequency of 146.91 in the southeast portion of Calgary. I know it is not Fusion. Thus could be DMR, D-Star or P25. The signal strength is strongest around 146.915 to 146.92. There is no listed repeater on any of the City of Calgary amateur radio clubs websites, nor repeaterbook.com. With this past summers interference on local FARS repeaters in Calgary, largely by construction companies, I hope that this digital noise on 146.915 is not another business operating illegally within the amateur radio bands. Thus would like to hear if anyone can shed some light on this frequency in Calgary.