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Electronic and Communications Engineering (EComE) Prof TS Ng Program Director

Electronic and Communications Engineering (EComE) Prof TS Ng Program Director. EComE. Longest history among other similar programmes in Hong Kong. One of our FOUR programmes Emphasis on electronics and communications technologies. Electronics. Semiconductor materials

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Electronic and Communications Engineering (EComE) Prof TS Ng Program Director

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  1. Electronic and Communications Engineering (EComE) Prof TS Ng Program Director

  2. EComE • Longest history among other similar programmes in Hong Kong. • One of our FOUR programmes • Emphasis on electronics and communications technologies.

  3. Electronics • Semiconductor materials p type n type

  4. Electronic Devices such as • Diodes • Transistors

  5. Analogue circuits • Amplifiers, oscillators, filters and mixers, etc Amp

  6. Digital Circuits • Logic circuits, adders, counters, memories, micro-controllers, microprocessors and CPU, etc 001 011 Adder 010 Inverter Adder 230 million transistors

  7. Communications Systems • Model of a communications system • which could be the cell phone systems, TV broadcast systems, fiber optic system, radio broadcast systems, telephone systems, WLAN systems or GPS system etc.

  8. Fiber Optic systems Model of a simple fiber optic system Equivalent to

  9. Fiber Optic systems (cont’d) Information is represented as optical signal sent to the fiber optic cable How does it work?

  10. TV Broadcast System

  11. Benefits • An analogue TV channel occupies about 8MHz frequency band, but by using MPEG-2 compression technology, the same bandwidth can accommodate at least four digital standard definition TV (SDTV) programme channels or one high definition TV (HDTV) programme channel at a time. • How to do this?

  12. Radio broadcast • Currently • FM requires 0.3 MHz per programme • By using digital techniques, the efficiency could be improved by about 17 times. • How to do this?

  13. Cellular Mobile Communications Systems • 2G GSM and CDMA (IS-95) • 2.5G GPRS and EDGE • 3G WCDMA system • 3.5G HSDPA and HPUPA • How do they work?

  14. Wireless LAN How does it work?

  15. Global Positioning System (GPS) How does it work?

  16. Spacecraft Voyagers • Launched in 1977. Now at 9.5 billion miles from the Sun. Light (signal) takes over 13.8 hrs to reach Earth (cf the Moon is about 1.4 light sec away from Earth, the Sun is about 8.5 light minutes away). • Still sending (very weak) signal back to Earth. • How to receive the signal?

  17. Large Antenna & powerful error correction coding NASA/JPL 70-meter Deep Space Station How does it work?

  18. The robot “Phoenix” sent to Mars to investigate whether Mars is a possible habitat for life How to control the Robot?

  19. Employment Statistics (2006)

  20. Employment Statistics (2006)

  21. Employment Statistics (2006)

  22. Questions and Answers later!

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