Mucluc - C s vin thng Phm Vn Tn NHNG CP BIN I FOURIER 1 NHNG TNH CHT TNG QUT s f = s(t)e j 2ft dt s(t = S f)e e 2ft df Function s(t-t0 e e 2f 0t

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C ơ s vi n thông Ph m V ă n T n Trang i NH NG C P BI N ĐỔ I FOURIER 1. NH NG TÍNH CH T T NG QUÁT: +∞ = dt e t s f s ft j π 2 ) ( ) ( +∞ = df e f S t s ft 2 ) ( ) ( Function Fourier transform s(t-t 0 ) ) ( 0 2 t s e t f dt ds t d s τ ) ( r(t)*s(t) r(t)s(t) s(at) ) ( 1 a t s a ) ( 0 2 f S e ft j S(f-f 0 ) [] ) ( ) ( 2 1 0 . 0 f f S f f S + + ) ( 2 f fS j f j f s 2 ) ( R(f)*S(f) ) ( 1 a f S a S(af)
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C ơ s vi n thông Ph m V ă n T n Trang ii 2.NH NG C P BI N ĐỔ I CHUYÊN BI T: Funtion Fourier Tranform ) ( t U e at 0 , 2 1 > + a f j a π ) ( t U te at 0 , ) 2 ( 1 2 > + a f j a 2 at e 0 , exp 2 2 > a a f a t 2 2 2 1 f t at sin < 2 0 2 1 a a f khi , f khi , < otherwise T t 0 2 1 fT fT 2 2 sin < otherwise T t T t 0 1 2 2 2 sin f T fT t a e 2 2 2 4 2 f a a + sgn(t) f j 1 δ (t) 1 1 ( ) f δ t f j 2 e 0 ( ) 0 f f cos2 π f 0 t [] ) ( ) ( 2 1 0 0 f f f f + + sin2 π f 0 t [] ) ( ) ( 2 0 0 f f f f j + U(t) f j f 1 ) ( 1 + 2 2
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C ơ S Vi n Thông Ph m V ă n T n Trang vi M C L C CH ƯƠ NG I. TIN T C VÀ H TH NG THÔNG TIN. I.1 I. L CH S PHÁT TRI N CÔNG NGH VI N THÔNG Đ I N T . I . 2 II. PHÂN LO I CÁC NGU N TIN T C VÀ CÁC H TH NG THÔNG TIN. I.3 III. SÓ NG XÁC ĐỊ NH VÀ SÓNG NG U N H I Ê N . I . 4 IV. S Ơ ĐỒ KH I M T H VI N T H Ô N G . I . 5 1. KH I X LÝ TÍN HI U : I . 5 2. KH I S Ó N G M A N G : I . 5 3. CÁC KÊNH TRUY N : I . 6 V. S PHÂN CHIA CÁC VÙNG T N S (FREQUENCY ALLOCATIONS). I.6 VI. S TRUY N SÓNG
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This note was uploaded on 01/18/2012 for the course INFORMATIK 2011 taught by Professor Phanthuongcang during the Winter '11 term at Cornell University (Engineering School).

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Mucluc - C s vin thng Phm Vn Tn NHNG CP BIN I FOURIER 1 NHNG TNH CHT TNG QUT s f = s(t)e j 2ft dt s(t = S f)e e 2ft df Function s(t-t0 e e 2f 0t

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