Digital passband filtering of megabaud transmitted data stream
C. Siller, H.C. Reeve, W. Debus · Electronics Letters · 1990
A digital filter architecture for spectral shaping of a transmitted QAM signal is described. The technique requires that a binary representation for a finite sequence of multilevel symbols be interpreted as an address to memory that stores a pre-emphasised output that uniquely defines the desired transmitted transfer function. Design of a 6.34Mbaud 16-QAM filter is illustrated.