ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #39 ECEN5533 Modern Commo Theory Dr. George Scheets Lesson #39 18 April 2016 Problems: 7.1, 3, & 7 Corrected design due Friday, 25 April Final Exam, Friday, 6 May, 8:00 – 9:50 AM

ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #40 ECEN5533 Modern Commo Theory Dr. George Scheets Lesson #40 20 April 2016 Read 12.1 Problems: 7.10, 12, & 16 Corrected design due Friday, 22 April Final Exam, Monday, 2 May, 1300 – 1450 ES303

ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #41 ECEN5533 Modern Commo Theory Dr. George Scheets Lesson #41 22 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

ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #42 ECEN5533 Modern Commo Theory Dr. George Scheets Lesson #42 25 April 2016 Problems: 12.10, 11, & 21 Final Exam, Monday, 2 May, 1300 – 1450 ES303

ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #43 ECEN5533 Modern Commo Theory Dr. George Scheets Lesson #43 27 April 2016 Radar Problems Final Exam, Monday, 2 May, 1300 – 1450 ES303

ECEN5533 Modern Commo Theory Dr. George Scheets. Lesson #44 ECEN5533 Modern Commo Theory Dr. George Scheets Lesson #44 29 April 2016 Old Exams Final Exam, Monday, 2 May, 1300 – 1450 ES303 Comprehensive, open book & notes ☺

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: http://voyager.jpl.nasa.gov/

Voyager Spacecraft source: September 1990 IEEE Communications Magazine

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

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

NASA Deep Space Network 70 m diameter parabolic source: http://deepspace.jpl.nasa.gov

Voyager FEC Coding source: Science, Summer 1990

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

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

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

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

Signal * Wideband Noise

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

NRAO's Very Large Array image source: http://www.vla.nrao.edu/

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

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

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

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

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

MIMO antenna Belkin Wireless Pre-N Router F5D8230-4 source: http://www.pcmag.com/article2/0,1759,1822020,00.asp

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

MIMO Example λ/2 fc = 300 MHz λ = 1 meter Signal to left antenna advanced by 333.3 picosecond ( = 10% wavelength) with respect to right antenna. Directivity Strength

MIMO Example λ/2 fc = 300 MHz λ = 1 meter Signal to left antenna delayed by 333.3 picosecond ( = 10% wavelength) with respect to right antenna. Directivity Strength

MIMO Example λ/2 fc = 300 MHz λ = 1 meter Signal to left antenna delayed by 833.3 picosecond ( = 25% wavelength) with respect to right antenna. Directivity Strength

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

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