This paper delves into digital filter design using the window function method,
with emphasis on the superior capabilities of MATLAB for rapid and effective filter creation.
Demonstrated through the design of a bandpass filter applied to a mixed sine wave signal,
MATLAB’s proficiency is highlighted. A simulation model, implemented in MATLAB,
validates the filter’s performance through observation of waveforms on Oscilloscopes. The
paper further explores digital filters with complex coefficients, presenting a theory grounded
in low-pass analog prototypes and digital design techniques. Comparative discussions on real
and analytic signal processing reveal analogous signal operation requirements, emphasizing
the efficiency of both approaches in processing information.
