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Definitions: Signaling and Encoding

Teacher: Doug Edwards
Across
(3) Phase of sine wave carrier is varied between two discrete values (for 0 and 1)
Aka PCM - converts analog signals to digital data.
Binary 1 is represented by changing the phase compared to the previous bit.
Manchester Phase Encoding
0 is represented by a transition at the beginning of a bit period. 1 by the absence of a transition at the beginning of a bit period.
Type of FSK that uses more than two frequencies to encode binary data.
Binary Frequency Shift Keying
Neg voltage = 1, pos voltage = 0
Opposite AMI
Down
Combines both ASK and PSK.
(2) 1 is represented by low to high transition. 0 is represented by high to low transition.
(3) ASK
Difference between two consecutive samples.
Frequency of sine wave carrier varied near carrier wave frequency.
Low to high = 1, No transition = 0
_____-AMI
Uses 90 degree phase shift.