Design and Simulation of FIR Digital Filter Under FPGA

Traditional filters often encounter issues such as introducing delay. As a common type of digital filter, FIR (Finite Impulse Response) filters have linear phase characteristics and stability, and digital filters have high importance in signal processing. FPGA (Field Programmable Gate Array) also has great advantages as an implementation platform. In order to implement FIR digital filters based on FPGA, this article adopted classic filter design methods. Firstly, the appropriate filter type was selected, and then the filter coefficients were calculated. Next, the FPGA development tool was used to implement the filter structure and simulation experiments were conducted. Through simulation experiments, the performance of the designed FIR digital filter was evaluated, and the amplitude and phase responses of the filter were analyzed and compared with the expected theoretical results. The FIR digital filter designed in this article can effectively filter out unnecessary frequency components and retain the signal components of interest. The results indicated that the design and simulation of FIR digital filters based on FPGA is a feasible and effective method. It can achieve filter performance that meets specific requirements and has broad application prospects. This study demonstrated that the design methods and simulation tools used can accurately simulate the behavior of FIR filters and meet design requirements and performance indicators.