G.fast is a new copper broadband technology that enables throughput of better than 1 Gb/s over a single twisted pair. The technology is based on a signal modulation scheme very similar to the DMT modulation used in VDSL2, with one notable exception, G.fast transceivers utilize time-division duplexing instead of the frequency-division duplexing used in VDSL2.
G.fast also borrows many other advances from VDSL2, including seamless rate adaption (SRA), bit swapping, retransmission, dying gasp, and vectoring. In addition, G.fast includes...