LTTH chuong 1-2 - Bai giang Ly thuyet tn hieu 1 Bai giang...

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9/7/2009 Giaûng vieân: Th.S Leâ Xuaân Kyø 1 Baøi giaûng: Lyù thuyeát tín hieäu Baøi giaûng: LYÙ THUEÁT TÍN HIEÄU 9/7/2009 Giaûng vieân: Th.S Leâ Xuaân Kyø 2 Baøi giaûng: Lyù thuyeát tín hieäu LYÙ THUYEÁT TÍN HIEÄU Chöông1: Moät soá khaùi nieäm cô baûn. Chöông 2: Tín hieäu xaùc ñònh. Chöông 3: Phaân tích tín hieäu trong mieàn taàn soá. Chöông 4: Truyeàn tín hieäu qua maïch tuyeán tính. Chöông 5: Tín hieäu ñieàu cheá.
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9/7/2009 Giaûng vieân: Th.S Leâ Xuaân Kyø 3 Baøi giaûng: Lyù thuyeát tín hieäu Chöông 1: Moät soá khaùi nieäm cô baûn I.Tín hieäu. II.Phaân loaïi tín hieäu. III.Bieåu dieãn giaûi tích tín hieäu. 9/7/2009 Giaûng vieân: Th.S Leâ Xuaân Kyø 4 Baøi giaûng: Lyù thuyeát tín hieäu Chöông 1: Moät soá khaùi nieäm cô baûn (tt) I. Tín hieäu: Nguoàn tin Bieán ñoåi tin töùc Tín hieäu Maùy phaùt(Ñieàu cheá) Keânh truyeàn Maùy thu (Giaûi ñieàu cheá) Bieán ñoåi tín hieäu Tin töùc Nhaän thoâng tin
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9/7/2009 Giaûng vieân: Th.S Leâ Xuaân Kyø 5 Baøi giaûng: Lyù thuyeát tín hieäu Chöông 1: Moät soá khaùi nieäm cô baûn (tt) I. Tín hieäu : 1. Ñònh nghóa: Tín hieäu laø bieåu dieãn vaät lyù cuûa tin töùc maø ta caàn chuyeån töø nguoàn tin ñeán nôi nhaän tin. 2. Nhieäm vuï cuûa Lyù thuyeát tín hieäu: Tìm ra caùc phöông phaùp bieåu dieãn tín hieäu: Coâng thöùc toaùn. Ñoà thò …. Ñöa ra caùc phöông phaùp phaân tích tín hieäu. 9/7/2009 Giaûng vieân: Th.S Leâ Xuaân Kyø 6 Baøi giaûng: Lyù thuyeát tín hieäu Chöông 1: Moät soá khaùi nieäm cô baûn (tt) II. Phaân loaïi tín hieäu: 1. Phaân loaïi theo quaù trình bieán thieân. 2. Phaân loaïi döïa treân naêng löôïng cuûa tín hieäu. 3. Phaân loaïi döïa treân hình thaùi tín hieäu. 4. Phaân loaïi theo taàn soá tín hieäu.
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9/7/2009 Giaûng vieân: Th.S Leâ Xuaân Kyø 7 Baøi giaûng: Lyù thuyeát tín hieäu Chöông 1: Moät soá khaùi nieäm cô baûn (tt) II. Phaân loaïi tín hieäu: 1. Phaân loaïi theo quaù trình bieán thieân: Tín hieäu xaùc ñònh: Quaù trình bieán thieân hoaøn toaøn xaùc ñònh vaø coù theå bieåu dieãn baèng moät haøm toaùn hoïc. Ví duï: x(t) =cos 2t. Tín hieäu ngaãu nhieân:Quaù trình bieán thieân khoâng ñöôïc bieát tröôùc muoán bieåu dieãn phaûi tieán haønh khaûo saùt, thoâng keâ. 9/7/2009 Giaûng vieân: Th.S Leâ Xuaân Kyø 8 Baøi giaûng: Lyù thuyeát tín hieäu Chöông 1: Moät soá khaùi nieäm cô baûn (tt) II. Phaân loaïi tín hieäu (tt): 2. Phaân loaïi döïa treân naêng löôïng cuûa tín hieäu: Tín hieäu naêng löôïng: Laø tín hieäu coù naêng löôïng höõu haïn .
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