figure 6.7: distorsion. bandbredd = övre gränsfrekvens – undre gränsfrekvens
Post on 21-Dec-2015
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Point-to-point communication
Mikrofon Högtalare
Source coding Source decodingDigitalizatingcompression
0110 0110
Error management Error control.
0100010
Bitfel
0110010
Flow control Flow control
Modulation Demodulation
0110010NACKACK
Layer6
Layer2
Layer1
Layer7
Digital modulation methods
Binär signal
ASK = Amplitude Shift Keying (AM)
FSK = Frequency Shift Keying (FM)
PSK = Phase Shift Keying (PSK)