Physical Layer

1
Physical Layer
2
Review

• The fundamental fact used in wired communications
  and wireless communications?

3
Review

• In wireless communications, the basic setup of
  the transmitter and receiver?

4
Review

• What is a low pass filter? We used it in two
  places, why?

5
Review

• What is up-convert? Down-convert?

6
Review

• What is BPSK?

7
Review

• Why can we use two channels, I and Q?
• What is QAM?

8
Review

• What is Shannons formula?

9
Ideal case

• If the bandwidth is infinite and absolutely no
  noise, how fast can you send/receive data?

10
Bandwidth

• If the media is of infinite bandwidth but with
  some noise, how fast can you send/receive data?
  Assuming that your device is fast enough.

11
Noise

• If there is absolutely no noise but the bandwidth
  is limited, how fast can you send/receive data?
  Assuming that your device is fine enough to tell
  the slightest differences of signal voltage.