2-5 Limit of physical layer
- The Nyquist Limit
- Shannon Capacity
The Nyquist Limit
noiseless channel
The maximum rate we send information across a noiseless channel is 2B multiplied by log to the base 2 of V.
Shannon Capacity
including noise
The signal to noise rate, or S by N is typically expressed on a long scale because it can take on a wide range of value -> SNRdb = 10log10 S/N
The limit, the capacity is given by the bandwidth multiplied by log to the base 2 1 plus S on N.
DSL: Digital Subsriber Line
