Manchester encoding: binary 1: transition from A/2 to –A/2 in middle of bit time interval, binary 0: transition from –A/2 to +A/2 in middle of bit time interval.
Differential Manchester encoding: There is a transition at the centre of each bit, but there is only a transition at the startof a 0 bit.
NRZ inverted (NZRI):starting at a fixed signal level, binary 1: denoted by a transition and binary 0: by no transition.
The maximum frequency of a NZRI signal is half that of Bipolar and Manchester encoded signals so it only requires half the transmission bandwidth
Use NRZI in Wide Area Networks (WANs) while the other methods are generally used in LANs.
Differential Manchester encoding: There is a transition at the centre of each bit, but there is only a transition at the startof a 0 bit.
NRZ inverted (NZRI):starting at a fixed signal level, binary 1: denoted by a transition and binary 0: by no transition.
The maximum frequency of a NZRI signal is half that of Bipolar and Manchester encoded signals so it only requires half the transmission bandwidth
Use NRZI in Wide Area Networks (WANs) while the other methods are generally used in LANs.
No comments:
Post a Comment