  Each generation of cellular communication systems is marked by a defining
disruptive technology of its time, such as orthogonal frequency division
multiplexing (OFDM) for 4G or Massive multiple-input multiple-output (MIMO) for
5G. Since artificial intelligence (AI) is the defining technology of our time,
it is natural to ask what role it could play for 6G. While it is clear that 6G
must cater to the needs of large distributed learning systems, it is less
certain if AI will play a defining role in the design of 6G itself. The goal of
this article is to paint a vision of a new air interface which is partially
designed by AI to enable optimized communication schemes for any hardware,
radio environment, and application.
