1. ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #39
ECEN5533 Modern Commo Theory Dr. George Scheets Lesson # April 2016
Problems: 7.1, 3, & 7
Corrected design due Friday, 25 April
Final Exam, Friday, 6 May, 8:00 – 9:50 AM

2. ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #40
ECEN5533 Modern Commo Theory Dr. George Scheets Lesson # April 2016
Read 12.1
Problems: 7.10, 12, & 16
Corrected design due Friday, 22 April
Final Exam, Monday, 2 May, 1300 – 1450
ES303

3. ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #41
ECEN5533 Modern Commo Theory Dr. George Scheets Lesson # April 2016
Read 12.2 – 12.4
Problems: 12.3, 4, & 9
Corrected design due Friday, 22 April
Exam #2 Final Results
Hi = 80, Low = 70, Ave = 75.00, σ = 4.40 A > 85, B > 74, C > 64
Final Exam, Monday, 2 May, 1300 – 1450
ES303

4. ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #42
ECEN5533 Modern Commo Theory Dr. George Scheets Lesson # April 2016
Problems: 12.10, 11, & 21
Final Exam, Monday, 2 May, 1300 – 1450
ES303

5. ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #43
ECEN5533 Modern Commo Theory Dr. George Scheets Lesson # April 2016
Radar Problems
Final Exam, Monday, 2 May, 1300 – 1450
ES303

6. ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #44
ECEN5533 Modern Commo Theory Dr. George Scheets Lesson # April 2016
Old Exams
Final Exam, Monday, 2 May, 1300 – 1450
ES303
Comprehensive, open book & notes ☺

7. Voyager II http://voyager.jpl.nasa.gov/index.html
Launch
August 1977
Jupiter fly-by
July 1979
Saturn fly-by
August 1981
Uranus fly-by
January 1986
Neptune fly-by
August 1989
16.60 Billion Km
111.0 AU
April 2016
Source: JPL
source:

8. Voyager Spacecraft
source:
September 1990
IEEE
Communications
Magazine

9. Galileo Spacecraft (1989 Launch)
image source: wikipedia.org

10. Galileo Spacecraft (1995 at Jupiter)
Partially deployed
hi-gain antenna.
image source: wikipedia.org

11. NASA Deep Space Network 70 m diameter parabolic
source:

12. Voyager FEC Coding
source: Science, Summer 1990

13. P(Bit Error) vs Eb/No
source: Science, Summer 1990

14. BER Performance at Jupiter
Target BER:
Imaging 5(10-3)
Non-Imaging: 5(10-5)
Command: 1(10-5)
NO CODE
CODING
source: Science, Summer 1990

15. BER Performance at Saturn
CODING
Same System
Configuration
as at Jupiter
CODING
Slowed bit
rate compared
to Jupiter
Target BER:
Imaging 5(10-3)
Non-Imaging: 5(10-5)
Command: 1(10-5)
source: Science, Summer 1990

16. BER Performance at Uranus
CODING
Same System
Configuration
as at Saturn
CODING
Reduced R
Increased Aer
Decreased Tsys
compared to Saturn
Target BER:
Imaging 5(10-3)
Non-Imaging: 5(10-5)
Command: 1(10-5)
source: Science, Summer 1990

17. Signal * Wideband Noise

18. BER Performance at Neptune
CODING
Same System
Configuration
as at Uranus
Target BER:
Imaging 5(10-3)
Non-Imaging: 5(10-5)
Command: 1(10-5)
CODING
Reduced R
Increased Aer
Rebuilt antennas
Additional coupling
source: Science, Summer 1990

19. NRAO's Very Large Array
image source:

20. Standard Single Carrier Modulation
frequency
Channel 1
Message power is multiplied by a carrier with a single center freq.
M-ASK, M-PSK, M-QAM
Example:
8 Mbps bit stream
carried by B-PSK with
16 MHz null-to-null BW
time

21. Orthogonal FDM time frequency Channel 1
Channels split into sub-channels
Bits parceled out to sub-channels
Advantage:
Sub-channel bit rates can be
modified to cope with
interference
Less susceptible to multipath
Example:
Eight 1 Mbps bit streams
carried by B-PSK with
Eight 2 MHz null-to-null BW
time

22. FDM with Multi-path T3 bounce path XMTR direct path direct path pulses
time
bounce path
XMTR
direct path
direct path pulses
RCVR
delay
bounce path pulses
Signal sum seen by Receiver MFD
Symbol decision intervals at Receiver.
The third bit is obliterated by multi-path. T1 T2 T3

23. OFDM with Multi-path Slower symbol rate over each subchannel. delay
bounce
direct
bounce
direct
direct
bounce
Matched filter detector will work OK. T1 T2 T3

24. MIMO Used in latest Cell & Wireless LAN protocols Potential Benefits
Steerable Beams
Increased antenna gain
Spatial Diversity
Several Versions of XMTR signal received
Improves BER
Spatial Multiplexing
Transmit several signals over independent paths
Increase usable BW

25. MIMO antenna Belkin Wireless Pre-N Router F5D8230-4 source:

26. MIMO Example λ/2 fc = 300 MHz λ = 1 meter Same signal fed
to both antennas.
Beam shoots out
both sides at 90
degree angle.
Directivity Strength

27. MIMO Example λ/2 fc = 300 MHz λ = 1 meter Signal to left
antenna advanced
by picosecond
( = 10% wavelength)
with respect to right
antenna.
Directivity Strength

28. MIMO Example λ/2 fc = 300 MHz λ = 1 meter Signal to left
antenna delayed
by picosecond
( = 10% wavelength)
with respect to right
antenna.
Directivity Strength

29. MIMO Example λ/2 fc = 300 MHz λ = 1 meter Signal to left
antenna delayed
by picosecond
( = 25% wavelength)
with respect to right
antenna.
Directivity Strength

30. MIMO Example λ/2 fc = 300 MHz λ = 1 meter Signal to left
antenna delayed
by 1 2/3 nanosecond
( = 50% wavelength)
with respect to right
antenna.
Directivity Strength

31. Wish to Probe Further?
See… Multiple Antenna Techniques for Wireless Communications
What Will 5G Be?
(Links on 5533 Home Page)