When I was recently looking at frequency band assignments to US carriers in the 700 MHz band by the FCC I noticed one thing that, from a European perspective, looks a bit odd. Perhaps somebody can enlighten me?:
LTE bands 12, 13, 14 and 17 in the 700 MHz frequency range are assigned to different network operators and each comes with an individual 20 MHz duplex gap. 10 MHz for uplink, 10 MHz for downlink and 20 MHz for the duplex gap, 40 MHz together. Multiplied by 4, that's 80 MHz for duplex gaps.
In Europe, band 20 in the 800 MHz range that is used by three network operators with 2x10MHz channels each only has a combined duplex gap of 11 MHz. To me that looks a lot more economical then spending 80 MHz for duplex gaps!? But perhaps I am missing something!?
Are those duplex gaps in the US used for anything or are they just wasted space?
Update: Thanks for the comments below, I have followed up on this thanks to them in this post.