"Vaporwave" is the umbrella genre that covers many (often overlapping) subgenres, one of them being Broken Transmission which you mentioned.

Here's a list of vaporwave subgenres with example albums: http://i.imgur.com/XE8fzLr.jpg

There have been a few new subgenres since that list was published in 2014(?), most notably hardvapour [sic] and metrosong.