第 2 章
-
Upload
deacon-cline -
Category
Documents
-
view
28 -
download
3
description
Transcript of 第 2 章
-
2
-
(media)
-
011 V01 V(Noise)
-
(digitize)(sampling)(quantizing)(coding)
-
(Baseband) (Broadband) (Carrier)
-
(1/2)Carrier()
-
(2/2) (Modulation) (Modulator) (Demodulation) (Demodulator) (Modem)
-
(1/2)AM/FM
vs.
-
(2/2) 10Base210Broad36
-
(1/5)Nonreturn-To-Zero (NRZ, ) 1 = 0 = 100VG-AnyLAN
-
(2/5)Return-To-Zero (RZ, ) 1 = 0 = 10Mbps ARCNET
-
(3/5)Nonreturn-To-Zero-Inverted (NRZI,) 1 = 0 = 10BASE-F
-
(4/5)Manchester () 1 = 0 = 10BASE-T
-
(5/5)Differential Manchester () 1 = 0 = Token Ring
-
(1/2)Bipolar Alternate Mark Inversion (Bipolar-AMI, ) T-Carrier Bipolar-8-Zero Substitution (B8ZS, ) T-Carrier High density bipolar 3 (HDB3, 3)E-Carrier Multilevel Transmission 3 (MLT-3, 3)100BASE-TX
-
(2/2) 5 (PAM5) , 100BASE-T2 1000BASE-T
-
MLT-3 Mario Mazzola, Luca Cafiero, and Tazio De NicoloMLT-3 0 = 1 = (0+0-)
-
MLT-3 (1/2)
-
MLT-3 (2/2)
-
(Amplitude Modulation, AM)(Amplitude Shift Keying, ASK)01
-
(Frequency Modulation, FM)(Frequency Shift Keying, FSK)01
-
(Phase Modulation, PM)(Phase Shift Keying, PSK)(Differential Phase Shift Keying, DPSK)01
-
QAM (Quadrature Amplitude Modulation) ASK PSK , ,
-
(Synchronization)(idle)(clock)1%50100
-
(Simplex), ,
-
(Half Duplex)()
-
(Full Duplex)
-
(Bandwidth) (Signal Bandwidth), ()(bit rate, bps, bits per second)(throughput)100BaseTx100 Mbps(capacity)
-
(Hertz, Hz)