  In this paper, firstly, the Shannon channel capacity formula is briefly
stated, and the relationship between the formula and the signal uncertainty
principle is analyzed in order to prepare for deriving the formula which is
able to break through the Shannon channel capacity. Then, as a practical
example of breaking the Shannon limit, the time-shift non orthogonal
multicarrier modulation technology is introduced. After more than twenty years
of development, this technique is proved to be a practical modulation technique
for digital communication.
