DSP_C4 - X L S TN HI U DSP (DIGITAL SIGNAL PROCESSING) ThS....

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: X L S TN HI U DSP (DIGITAL SIGNAL PROCESSING) ThS. ng Ng c H nh hanhdn@hcmut.edu.vn Chng 4: B L C P NG XUNG H U H N CHNG 4: B LC P NG XUNG HU HN Cc phng php DSP trong thc t: r Phng php x l khi: d liu vo c thu thp v x l theo tng khi r Phng php x l mu: d liu c x l tng mu tng thi im qua gii thut DSP cho cc mu ng ra 2 3-M a r- 1 3 CHNG 4: B LC P NG XUNG HU HN Phng php x l khi: r Khi vo gm L mu: T L : t ng th i gian thu d li u f s : t c l y m u r L mu lu li trong x(n), vi n=0,1,,L-1: x = [x x 1 x 2 x 3 x L-1 ] r p ng xung c chiu di M+1: (b lc FIR bc M) h = [h h 1 h 2 h 3 h M ] 2 3-M a r- 1 4 H x x 1 x 2 ... x L-1 y y 1 y 2 y 3 y 4 e L s L T f = CHNG 4: B LC P NG XUNG HU HN Phng php x l khi: r Tch chp r Dng trc tip r Dng tuyn tnh bt bin theo thi gian LTI r Dng ma trn r Dng lt v trt r Trng thi tc thi & trng thi t nh r Tch chp i vi chui khng xc nh chiu di 2 3-M a r- 1 5 CHNG 4: B LC P NG XUNG HU HN 1. Tch ch p: r Cng thc tch chp dng trc tip hoc dng LTI: 2 3-M a r- 1 6 H x x 1 x 2 ... x L-1 y y 1 y 2 y 3 y 4 e ( ) ( ) ( ) ( ) = + = = = n j i j i m m j x i h n y m n h m x m n x m h n y , ) ( ) ( ) ( ) ( CHNG 4: B LC P NG XUNG HU HN 2. D ng tr c ti p: r Xt b lc nhn qu FIR bc M: r Vi tn hiu vo x chiu di L, dng trc tip: 2 3-M a r- 1 7 1 1 [ , ,..., ] M h h h h h L M = = + ( ) ( ) ( ) m y n h m x n m = 1 [y] 1 [ ] [ ] h m M n L M x n m L + Ng ra y(n) = [y y 1 y 2 y L 1 + M ] c chi u di L y =L+M =L x + L h - 1 CHNG 4: B LC P NG XUNG HU HN r iu kin ca m: r B lc FIR bc M, ng vo d liu chiu di L 2 3-M a r- 1 8 1 1 max( , ) min( , ) m M n L m n M n L m n + + 1 min( , ) max( , ) ( ) ( ) ( ) n M m n L y n h m x n m = + = 0 1 1 , ,..., n L M = + CHNG 4: B LC P NG XUNG HU HN VD: Xt b lc bc 3, chiu di tn hiu u vo l 5 r Cc khi ng vo, b lc, ng ra:...
View Full Document

Page1 / 32

DSP_C4 - X L S TN HI U DSP (DIGITAL SIGNAL PROCESSING) ThS....

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online