CellularInsights was a source. My undergrad is EE/CS and I studied digital comms as well as meet Qualcomm people mobile health summit and other health computer conferences.
Sources included iFixit which discussed the chips involved (but neglected to mention whether there were 2 or 4 antennas in iPhone 7 which cellular insights did provide), Qualcomm data sheets, Tmobile and Verizon press releases, fiercewireless, howardforums, Enhanced Voice Services (EVS) specs and datasheets from Ericcson, Nokia, and others.
Walrus01, you brought a very interesting topic. In NYC market for instance, operators provision their cell sites between 100 and 400Mbps. Verizon for instance has 45MHz of aggregate downlink radio capacity, which in today's 2x2 MIMO configuration means 337.5Mbps potential throughput per sector, times three sectors per site and you're at 1Gbps requirement. Yet, their sites are mostly provisioned at 150 or 200Mbps PER SITE, and then shared between three sectors. Most of their sites have 1Gbps capable cards too...
It's been an opex saving trend for all operators which will allows them to "control" incremental capacity gain at their discretion, without a truck roll.
I definitely plan on addressing that in the future posts, it's an annoying issue from the consumer perspective, that's for sure.
