  For the upcoming 6G wireless networks, a new wave of applications and
services will demand ultra-high data rates and reliability. To this end, future
wireless systems are expected to pave the way for entirely new fundamental air
interface technologies to attain a breakthrough in spectrum efficiency (SE).
This article discusses a new paradigm, named generalized polarization transform
(GPT), to achieve an integrated design of coding, modulation, multi-antenna,
multiple access, etc., in a real sense. The GPT enabled air interface develops
far-reaching insights that the joint optimization of critical air interface
ingredients can achieve remarkable gains on SE compared with the
state-of-the-art module-stacking design.
