
TRUY N THÔNG SỀ Ố
DIGITAL COMMUNICATION
Tu n 5ầ
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Reference
•“Digital communications: Fundamentals
and Applications” by Bernard Sklar
•Catharina Logothetis’s Lecture, Uppsala
University
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Last time
•Signal space used for detection
•Signal detection in AWGN channels
–Correlator/Matched-filter Demodulator
–Maximum likelihood
•The techniques to reduce ISI
–Pulse shaping
–Equalization
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Today: BANDPASS
MODULATION
•Các cách đi u ch d i qua (bandpass modulation ề ế ả
schemes)
–M-PAM, M-PSK, M-FSK, M-QAM
•Tách sóng t i đ u thu (detect the transmitted ạ ầ
information at the receiver)
–Coherent detection
–Non-coherent detection
•Tính xác su t l i trung bình (the average probability ấ ỗ
of symbol error) c a các d ng đi u chủ ạ ề ế
•So sánh các d ng đi u chạ ề ế
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