Research and Design About Bandwidth Variable with Time of Digital Filter Handling on FPGA
Chen He · Microcomputer applications · 2007
This paper introduced a new design method of FIR band-pass digital filter.It was based on the arithmetic of Chebyshev approach by which we can get the system transform function,and it was realized by the method of frequency domain multiply(FDM) on a FPGA chip.There were some strictly requirements on the pass-band ripple and on the stop-band attenuation.We had reached the requirements with the arithmetic Chebyshev approach.We also realized it with MATLAB and described the FDM structure in RTL level with VHDL which is one of the hardware describe language.We had successfully tested the hardware design.The essay concluded the feasibility of FIR filter with arithmetic of Chebyshev approach on the FPGA.