ABSTRACT
Different kinds of functions are required for today's Electronics and Communication
applications with very precise characteristics like frequency, phase, magnitude and waveform
etc. A technique for Field Programmable Gate Array (FPGA) based hardware realization has
been developed for the design, implementation and prototyping of useful functions in digital
form. The technique makes use of the orthogonal functions like Rademacher and the Walsh
functions for the hardware realization. The FPGA based hardware realization of sinusoidal,
triangular, and trapezoidal waveforms in their digital form has been demonstrated with good
results. A comparative study of hardware realization of such functions targeted to various
FPGAs available from Xilinx has been made. It is concluded that virtually any periodic
function may be realized directly in its digital form (without the need of Analog to Digital
conversion) with the help of FPGAs using orthogonal functions.