The Comparative Study of FPGA based FIR Filter Design Using Optimized Convolution Method and Overlap Save Method
In this paper, the authors describe a comparative study of designing digital filter of long duration sequences. Here, they have adopted the approach of block filtering scheme \"Overlap save method\" and compare with the optimized linear convolution scheme for designing digital filter. They have implemented both methods in FPGA Spartan 3A starter kit, XC3S700A device. Implementing both algorithms in FPGA hardware platform reveals that there is a 67% area reduction and 70.6% increase in operating frequency in overlap save method compare to optimize convolution method.