- Fact:
- Beside physical constraints
imposed by the
property of the
the transmission media,
another factor that
affects the
quality of the
received signal is:
- noise
- Beside physical constraints
imposed by the
property of the
the transmission media,
another factor that
affects the
quality of the
received signal is:
- The factors that
determine the
data transmission rate over
a transmission medium
(from electronics):
- Bandwith of the
transmission medium
(i.e., the physical property)
- Ambient noise
- Bandwith of the
transmission medium
(i.e., the physical property)
- Theoretical
maximum data rate
of a transmission channel:
(no proof)
- Maximum data rate of
a transmission medium is:
where:
C = maximum data rate (in # bits/sec) --- a.k.a. capacity B = Bandwidth of the transmission medium (in Hz) S = power of the transmited signal (in Watt) N = power of the ambient noise (in Watt) S/N is called the "Signal to Noise ratio"
Note:
- This famous result is derived by the late Mathematician Claude Shannon (see: click here )
- Maximum data rate of
a transmission medium is: