Ch0: INTRODUCTION <ul><li>0.1  Mobile communications </li></ul><ul><li>1st generation: analog voice service </li></ul><ul>...
Ch0: INTRODUCTION <ul><li>Quality of Service in old generations:  </li></ul><ul><ul><li>Voice Quality (improved) , Coverag...
Ch0: INTRODUCTION
Ch0: INTRODUCTION <ul><li>0.2  Development of CDMA :  </li></ul><ul><li>Spread spectrum communications originate from MIT ...
Ch0: INTRODUCTION <ul><li>0.3  3G development history :   </li></ul><ul><li>In 1985 ITU (International Telecommunication U...
Ch0: INTRODUCTION <ul><li>W-CDMA:  </li></ul><ul><li>It is proposed by Ericsson (Sweden) and NTT DoCoMo (Japan) which is a...
Ch0: INTRODUCTION <ul><li>3G Telecommunication licenses  </li></ul><ul><ul><li>Taiwan : A,B,C,D for W-CDMW at 2G Hz and E ...
Ch0: INTRODUCTION <ul><li>0.4  International Telecommunication Union (ITU) </li></ul><ul><li>IMT-2000 :  </li></ul><ul><ul...
Ch0: INTRODUCTION <ul><li>Seamless World-wide Access  </li></ul>
Ch0: INTRODUCTION <ul><li>Air Interfaces for 3G  </li></ul>
Ch0: INTRODUCTION <ul><li>Air Interfaces for 3G  </li></ul>
Ch0: INTRODUCTION <ul><li>Spectrum Allocation for 3G </li></ul>
Ch0: INTRODUCTION <ul><li>Evolutionary Path of GSM towards UMTS  </li></ul>
Ch0: INTRODUCTION <ul><li>0.5  4G possible techniques </li></ul><ul><li>W-CDMA with OFDM technique -> Multi-Carrier CDMA <...
Ch0: INTRODUCTION <ul><li>0.6  Principles of spread spectrum systems :   </li></ul>
Ch0: INTRODUCTION <ul><li>The major applications of spread spectrum communications are  </li></ul><ul><ul><li>for military...
Ch0: INTRODUCTION <ul><li>Multiple access </li></ul><ul><ul><li>One of the most advantageous properties of spread spectrum...
Ch0: INTRODUCTION <ul><li>Digital Communication Systems  </li></ul>
Ch0: INTRODUCTION <ul><li>Digital Communication Systems and CDMA systems </li></ul>
Ch0: INTRODUCTION <ul><li>Text Book layout (Topics for CDMA systems)  </li></ul>
Ch0: INTRODUCTION <ul><li>CDMA with QPSK Modulation Systems  </li></ul>
Ch0: INTRODUCTION <ul><li>Uplink CDMA Systems  </li></ul>
Ch0: INTRODUCTION <ul><li>Uplink CDMA Systems with multicode transmission </li></ul>
Ch0: INTRODUCTION <ul><li>Downlink CDMA Systems </li></ul>
Ch0: INTRODUCTION <ul><li>0.7  Important Topics for CDMA network systems (physical layer) </li></ul><ul><li>PN sequences <...
Ch0: INTRODUCTION <ul><li>0.8  Reference </li></ul><ul><li>S.G. Glisic, “Adaptive WCDMA,” , Chapter 1 </li></ul><ul><li>CD...
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第0章

  1. 1. Ch0: INTRODUCTION <ul><li>0.1 Mobile communications </li></ul><ul><li>1st generation: analog voice service </li></ul><ul><ul><li>AMPS(USA), Advances Mobile Phone Service, IS-54 </li></ul></ul><ul><ul><li>NMTS(Europe), Nordic Mobile Telephone System </li></ul></ul><ul><ul><li>TACS(England), Total Access Communication System </li></ul></ul><ul><ul><li>NAMTS(Japan), NEC Advances Mobile Telephone System </li></ul></ul><ul><li>2nd generation: voice and data service </li></ul><ul><ul><li>D-AMPS(USA), Digital-AMPS, IS-136 </li></ul></ul><ul><ul><li>GSM(Europe), Global System for Mobile Communication </li></ul></ul><ul><ul><li>DCS(England), Digital Cellular System </li></ul></ul><ul><ul><li>PDC(Japan), Personal Digital Cellular </li></ul></ul><ul><ul><li>CDMA(North American), IS-95 </li></ul></ul><ul><li>3rd generation: voice, data and multi-media service (2Mbps) </li></ul><ul><li>4th generation: voice, data and interactive-media service (156Mbps) </li></ul>
  2. 2. Ch0: INTRODUCTION <ul><li>Quality of Service in old generations: </li></ul><ul><ul><li>Voice Quality (improved) , Coverage (world-wide seamless access) & Costs (low) </li></ul></ul><ul><ul><li>Quality of Service aspects : low BER and low delay time </li></ul></ul><ul><li>New Services and Capabilities in new generations </li></ul><ul><ul><li>Enabling new voice and data service that are not currently available with 1G and 2G technology </li></ul></ul><ul><ul><li>High bandwidth services (data, image, multimedia) </li></ul></ul>
  3. 3. Ch0: INTRODUCTION
  4. 4. Ch0: INTRODUCTION <ul><li>0.2 Development of CDMA : </li></ul><ul><li>Spread spectrum communications originate from MIT Lincoln Labs since 1920’s. </li></ul><ul><li>The theory of spread spectrum communications has been well known since the late 1940's. </li></ul><ul><li>It has been used somewhat intensively in the field of secure military communications since 1950's, but in commercial applications it is a relatively new technique. </li></ul><ul><li>The spread spectrum technique has been released from military since 1970’s. </li></ul><ul><li>The first major commercial application of spread spectrum techniques was the Global Positioning System (GPS). </li></ul><ul><li>R.G. Cooper and Nettleton proposed the North American DS-CDMA systems in 1977. It is further commercialized by Qualcomm as narrowband CDMA(IS-95) </li></ul>
  5. 5. Ch0: INTRODUCTION <ul><li>0.3 3G development history : </li></ul><ul><li>In 1985 ITU (International Telecommunication Union) proposed the 3G specification, which is called FPLMTS (Future Public Land Mobile Telecommunication Systems). In 1996 it is renamed as IMT-2000 (International Mobile Telecommunication) and defines the specifications </li></ul><ul><ul><li>144K bps in fast moving speed </li></ul></ul><ul><ul><li>384K bps in walking, slow moving speed </li></ul></ul><ul><ul><li>2M bps in standstill environment </li></ul></ul><ul><li>Proposals for 3G Standards </li></ul><ul><ul><li>Wideband-CDMA (Europe) </li></ul></ul><ul><ul><li>CDMA-2000 (North American) </li></ul></ul><ul><ul><li>TD-SCDMA (China) </li></ul></ul>
  6. 6. Ch0: INTRODUCTION <ul><li>W-CDMA: </li></ul><ul><li>It is proposed by Ericsson (Sweden) and NTT DoCoMo (Japan) which is an extension of GSM systems. In 2001, The first W-CDMA 3G service is proposed in Japan by the DoCoMo company. </li></ul><ul><li>CDMA-2000 </li></ul><ul><li>It is an extension of narrowband CDMA (IS-95) </li></ul><ul><ul><li>CDMA-2000 1X, wideband service, 307K bps in 1.25M Hz BW </li></ul></ul><ul><ul><li>CDMA-2000 3X, wideband service 2M bps in 5M Hz BW </li></ul></ul><ul><ul><li>CDMA 2000 1X EV-DO </li></ul></ul><ul><ul><li>CDMA one, narrowband service, 8 voices, 64K bps/channel </li></ul></ul><ul><ul><li>In 2000, The telecommunication company in Korean proposed CDMA 2000 1X system and the Samsung Electronics company propose a few types of CDMA-2000 1X handsets. </li></ul></ul><ul><li>TD-SCDMA </li></ul><ul><li>It is the combination of TDMA system and synchronization CDMA, which is proposed by the Simens (Germany) and Datang (China) in 1999. </li></ul>
  7. 7. Ch0: INTRODUCTION <ul><li>3G Telecommunication licenses </li></ul><ul><ul><li>Taiwan : A,B,C,D for W-CDMW at 2G Hz and E for CDMA2000 at 800M Hz. </li></ul></ul><ul><ul><li>Japan: 2 for W-CDMA and 1 for CDMA2000 </li></ul></ul><ul><ul><li>Korean: 3 for W-CDMA and 1 for CDMA2000 </li></ul></ul>
  8. 8. Ch0: INTRODUCTION <ul><li>0.4 International Telecommunication Union (ITU) </li></ul><ul><li>IMT-2000 : </li></ul><ul><ul><li>International Mobile Telecommunications 2000 </li></ul></ul><ul><ul><li>the time schedule for the first trial system : year 2000 </li></ul></ul><ul><ul><li>the frequency range to be used : around 2000 MHz </li></ul></ul><ul><li>The International Telecommunication Union (ITU) is responsible for the IMT-2000 specification. </li></ul><ul><ul><li>The requirements for the 3G standardisation have been discussed under the term FPLMTS (Future Public Land Mobile Telecommunications System) since the early 1990s. </li></ul></ul><ul><ul><li>In the mid 1990s the term FPLMTS was changed to the term IMT-2000. </li></ul></ul><ul><li>UMTS </li></ul><ul><ul><li>UMTS stands for Universal Mobile Telecommunications System </li></ul></ul><ul><ul><li>UMTS is a member of the ITU‘s IMT-2000 global family of 3G mobile communication systems </li></ul></ul><ul><ul><li>The European Telecommunication Standards Institute ETSI is responsible for the UMTS standardization </li></ul></ul><ul><ul><li>UMTS is the successor standard to the second generation GSM. </li></ul></ul><ul><ul><li>UMTS will play a key role in creating the future mass market for high-quality wireless multimedia communications that will approach 2 billion users worldwide by the year 2010 </li></ul></ul>
  9. 9. Ch0: INTRODUCTION <ul><li>Seamless World-wide Access </li></ul>
  10. 10. Ch0: INTRODUCTION <ul><li>Air Interfaces for 3G </li></ul>
  11. 11. Ch0: INTRODUCTION <ul><li>Air Interfaces for 3G </li></ul>
  12. 12. Ch0: INTRODUCTION <ul><li>Spectrum Allocation for 3G </li></ul>
  13. 13. Ch0: INTRODUCTION <ul><li>Evolutionary Path of GSM towards UMTS </li></ul>
  14. 14. Ch0: INTRODUCTION <ul><li>0.5 4G possible techniques </li></ul><ul><li>W-CDMA with OFDM technique -> Multi-Carrier CDMA </li></ul><ul><li>LAS-CDMA (large area synchronization CDMA by China) </li></ul><ul><li>Position CDMA </li></ul><ul><li>4G standards will be proposed in 2010 ( NTT DoCoMo plans to propose the 4G standard in 2007). </li></ul>
  15. 15. Ch0: INTRODUCTION <ul><li>0.6 Principles of spread spectrum systems : </li></ul>
  16. 16. Ch0: INTRODUCTION <ul><li>The major applications of spread spectrum communications are </li></ul><ul><ul><li>for military purpose, which requires </li></ul></ul><ul><ul><ul><li>Security or low probability of interception </li></ul></ul></ul><ul><ul><ul><li>Anti-jamming, anti-interference </li></ul></ul></ul><ul><ul><li>for commercial purpose, which requires </li></ul></ul><ul><ul><ul><li>Multiple access capability </li></ul></ul></ul><ul><ul><ul><li>Anti-multipath fading </li></ul></ul></ul><ul><li>Anti-jamming, anti-interference </li></ul>
  17. 17. Ch0: INTRODUCTION <ul><li>Multiple access </li></ul><ul><ul><li>One of the most advantageous properties of spread spectrum technique is that it can be very conveniently used as a multiple access method. </li></ul></ul><ul><ul><li>In the traditional multiple access schemes, the fundamental resources are frequency and time. </li></ul></ul><ul><ul><ul><li>frequency division multiple access (FDMA) and </li></ul></ul></ul><ul><ul><ul><li>time division multiple access (TDMA),. </li></ul></ul></ul><ul><ul><li>In CDMA, multiple users are using the same frequency band at the same time (time and frequency overlap). The key elements are the used spreading codes and their properties. </li></ul></ul><ul><ul><li>Show a lot of block diagrams of CDMA systems in the following. </li></ul></ul>
  18. 18. Ch0: INTRODUCTION <ul><li>Digital Communication Systems </li></ul>
  19. 19. Ch0: INTRODUCTION <ul><li>Digital Communication Systems and CDMA systems </li></ul>
  20. 20. Ch0: INTRODUCTION <ul><li>Text Book layout (Topics for CDMA systems) </li></ul>
  21. 21. Ch0: INTRODUCTION <ul><li>CDMA with QPSK Modulation Systems </li></ul>
  22. 22. Ch0: INTRODUCTION <ul><li>Uplink CDMA Systems </li></ul>
  23. 23. Ch0: INTRODUCTION <ul><li>Uplink CDMA Systems with multicode transmission </li></ul>
  24. 24. Ch0: INTRODUCTION <ul><li>Downlink CDMA Systems </li></ul>
  25. 25. Ch0: INTRODUCTION <ul><li>0.7 Important Topics for CDMA network systems (physical layer) </li></ul><ul><li>PN sequences </li></ul><ul><li>Code acquisition </li></ul><ul><li>Code tracking </li></ul><ul><li>Modulation/demodulation </li></ul><ul><li>Power control </li></ul><ul><li>Adaptive CDMA networks </li></ul><ul><li>Radio channel </li></ul><ul><li>Multiuser detection </li></ul><ul><li>Advanced CDMA systems, MC-CDMA, OFDM </li></ul>
  26. 26. Ch0: INTRODUCTION <ul><li>0.8 Reference </li></ul><ul><li>S.G. Glisic, “Adaptive WCDMA,” , Chapter 1 </li></ul><ul><li>CDMD development group, http:// www.cdg.org </li></ul><ul><li>3G Partnership Project 2 , http://www.3gpp2.org/ </li></ul><ul><li>3 G Partnership Project , http://www.3gpp.org/ </li></ul><ul><li>3G Today - IMT-2000 Standard , http://www.3gtoday.com/index.html </li></ul><ul><li>CDMA2000 , http:// www.ericsson.com / </li></ul><ul><li>Cellular Online , http:// www.cellular.co.za/main.htm </li></ul><ul><li>Cellular Technologies Of The World , http:// www.cellular.co.za/main.htm </li></ul><ul><li>Philips Consumer Communications , http:// www.wca.org/dgibson/index.htm </li></ul><ul><li>TDD White Paper , http:// www.tddcoalition.org / </li></ul><ul><li>TD-SCDMA White Paper , http://www.siemens-mobile.com/mobile </li></ul><ul><li>Wireless Web Features - TD-SCDMA and W-CDMA make ideal partners for 3G , http:// wireless.iop.org / </li></ul><ul><li>UMTS World , http:// www.umtsworld.com/default.htm </li></ul>

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