it 327 - schweber chap 111 with thoughtless and impatient hands, we tangle the plans the lord hath...
TRANSCRIPT
IT 327 - Schweber Chap 11 1
Thought of the Day
With thoughtless and impatient hands, we tangle the plans the Lord hath laid. Then when we cry in pain, He answers, “Be patient, my son, and wait while I untangle the knot.”
Elder Boyd K. Packer
IT 327 - Schweber Chap 11 2
Schweber, Chap 11:Digital Communication
Fundamentals
Chap 11: Complete Digital Communication System
IT 327 - Schweber Chap 11 3
Chap 11: Layers of Communication
IT 327 - Schweber Chap 11 4
Shift Register (AKA: SERDES)
IT 327 - Schweber Chap 11 5
Companding
IT 327 - Schweber Chap 11 6
Bit-Level Synchronization
IT 327 - Schweber Chap 11 7
Synchronizing: Options
IT 327 - Schweber Chap 11 8
1. Send the clock as a separate signalA. Requires separate channel, more BWB. Common for short-distance communication, where each channel is nearly free
2. Reference a common signalA. 50 Hz, 60 HzB. GPS clock
3. Derive clock timing from the received data4. Use special bits as part of the data stream
#3, 4 together by far the most common for distances over about 15 feet.
Synchronizing: PLLs
IT 327 - Schweber Chap 11 9
Synchronizing: PLL Capture & Lock
IT 327 - Schweber Chap 11 10
Synchronizing: PLL Special
Bits
IT 327 - Schweber Chap 11 11