TRUY N THÔNG S
DIGITAL COMMUNICATION
Tu n 5
1
Reference
“Digital communications: Fundamentals
and Applications” by Bernard Sklar
Catharina Logothetis’s Lecture, Uppsala
University
2
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
3
Today: BANDPASS
MODULATION
Các cách đi u ch d i qua (bandpass modulation ế
schemes)
M-PAM, M-PSK, M-FSK, M-QAM
Tách sóng t i đ u thu (detect the transmitted
information at the receiver)
Coherent detection
Non-coherent detection
Tính xác su t l i trung bình (the average probability
of symbol error) c a các d ng đi u ch ế
So sánhc d ng đi u ch ế
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