Title :
Digital passband filtering of megabaud transmitted data stream
Author :
Siller, C.A. ; Reeve, H.C. ; Debus, W.
Author_Institution :
AT&T Bell Lab., Andover, MA, USA
Abstract :
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 6-34 Mbaud 16-QAM filter is illustrated.
Keywords :
band-pass filters; data communication equipment; digital filters; 16-QAM filter; QAM signal; binary representation; digital filter architecture; finite sequence; megabaud transmitted data stream; memory address; multilevel symbols; passband filtering; quadrature amplitude modulation; spectral shaping; transmitted transfer function;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19901307
