ECEN4533 Data
Communications
Lecture #39 18 April 2011
Dr. George Scheets
ECEN4533 Data
Communications
Lecture #40 20 April 2011
Dr. George Scheets
ECEN4533 Data
Communications
Lecture #41 22 April 2011
Dr. George Scheets
Very Large Array Parabolics
Satcom & Flat Panel
Antenna Arrays
Omni-Directional Antenna
Array
Two Omni Array Example
Two Omni Array Example
Two Omni Array Example
Two Omni Array Example
Two Omni Array Example
10BaseT & Shared Hub
10BaseT & Switched Hub
10BaseT & Switched Hub
802.11 & Omni Antenna
802.11 & MIMO Antennas
Digital Communication
System
with Analog Source
Digital Communication System
Binary PSK
M-Ary Signaling
Ways to decrease P(Bit
Error)
No coding: Binary System
2:1 FEC Binary System
Example) Two bit code words
3:1 FEC Binary System
Example) SSD 3 bit code
words
Local Oscillator on
frequency
Local Oscillator off
frequency
Doppler Effect
60 mph (26.8 m/sec), 2 m offset
Receiver Phase Locked Loop
Phase Locked Loop
Phase Locked Loop
Phase Locked Loop
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