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3。1 P u r p o s e a n d s i g n i f i c a n c e o f t h e research1 R e s e a r c h h o m e a n d abroad1 S t u d y o f t h e s u b j e c t c o n t e n t a n d e xp ec ta tio ns 2 2 F I R d i g i t a l f i l t e r formula3 2 .1 F i l t e r Overview 3 2 .2 F I R f i l t e r based 3 The basic structure of FIR filter3 Comparison of FIR and IIR filters5 FIR Filter Design Window Function6 Obtain the filter coefficients using MATLAB tools7 Distributed Algorithms8 Several FIR Filter Implementation8 Derivation of Distributed Algorithms9 3 E D A t e c h n o l o g y a n d F P G A description11 3 .1 E D A T e c h n i c a l Overview11 3 . 2 F P G A Overview 1 1 III 3 . 2 . 1 F P G A introduction 1 1 3 . 2 . 2 T h e b a s i c s t r u c t u r e o f FPGA11 3 . 2 . 3 F P G A d e s i g n flow11 4 V H D L l a n g u a g e b a s e d o n F I R f i l t e r d e si gn13 4 . 1 F P G A b a s e d F I R f i l t e r d e s i g n process13 4 . 2 V H D L l a n g u a g e t o d e s c r i b e t h e r e a l i z a ti o n o f F I R f i l t e r d e s i g n 13 The output of each module to determine the median