  From generation to generation there are increasing requirements for wireless
standards both in terms of spectral and energy efficiency. While up to now the
layered wireless transceiver architecture worked allowing for, e.g., separation
of channel decoding algorithms from front-end design, this may need
reconsideration in the 6G era. Especially the hardware-originated distortions
have to be taken into account while designing other layer algorithms as the
high throughput and energy efficiency requirements will push these devices to
their limit revealing their nonlinear characteristics. This position paper will
shed some light on new degrees of freedom while cross-layer designing and
controlling multicarrier and multiantenna transceivers of 6G systems.
