Complex Modulation
Baud rate: number of clock cycles per second
- Usually 2,400 to 3,200 baud for telephone modems
Bits sent per clock cycle depends on number of possible states
- 2 bits/clock cycle= number of possible states
- In our example 8 possible states, so 2n=8
- n must be 3
Bit rate = baud rate * bits/clock cycle
- In our example, bits/state = 3
- So if baud rate is 2,400, bit rate would be 9,600