ABSTRACT
A graphically-orientedMATLAB programwritten by the au-
thors facilitates teaching real-world digital signal process-
ing concepts such as quantization of digital ?lter coef?-
cients that occur in ?xed-point processors, for example the
widely used TMS320C5x. While many universities have
or plan to buy the inexpensive ?oating-point TMS320C31
DSKs for pedagogical reasons, this MATLAB program sim-
ulates certain ?xed-point effects on these ?oating-point de-
vices and eliminates the need to purchase expensive special-
ized software programs or extra hardware. The programde-
scribed in this paper provides an interactive graphical user
interface which communicates directly with the DSK, and
demonstrates in real-time how coef?cient quantization ad-
versely affects ?lter performance, without the need for te-
dious programming of the TMS320C31.