Summary of Chapter II

1. Data Transmission

Step 1: what we have

Analog signal Carry wave (carrier) Received singal ??

Step 2

After sampling and quantization, we obtain1 2 3 2 1 = 100 010 110 010 100 (three-level coding is applied)

Step 3Coding with self-clocking (Manchester code)

10 01 01 01 10 01 10 10 01 01 10 01 10 01 01

Step 4: modulation (ASK)

Step 5: send over the channel

Step 6: Demodulation

10 01 01 01 10 01 10 10 01 01 10 01 10 01 01

Step 7: Decode

1 0 0 0 1 0 1 1 0 0 1 0 1 0 0

1 2 3 2 1

Step 8: Convert back to analog signals (assuming our sampling is fast enough)

1 2 3 2 1

2. Fourier transform (a light touch)

Time domain Frequency domain

3. Probability: mean, variance,

normal distribution