Wireless Communications

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Wireless Communications

• 1). Wireless Communication Technology
• 2). Cellular System Design Fundamental
• (0G-5G)
• 3). WiMAX,
• 4). Wireless LANs (WiFi)
• 5). Bluetooth
• 6). Satellite (GPS)

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Reading list

• William Stallings, Wireless Communications and
  Networks 2/e. 2005. Prentice Hall.  
• T.S. Rappaport. Wireless Communications. 2/e. 
  2002. Prentice Hall. 
• Official websites of 3GPP, WiMAX, LTE, WiFi,
  Bluetooth, IEEE, etc. 

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Wireless Comes of Age

• Guglielmo Marconi invented the wireless telegraph
  in 1896
• Communication by encoding alphanumeric characters
  in analog signal
• Sent telegraphic signals across the Atlantic
  Ocean
• Communications satellites launched in 1960s
• Advances in wireless technology
• Radio, television, mobile telephone,
  communication satellites
• More recently
• Satellite communications, wireless networking,
  cellular technology, WPAN, WLAN, WMAN and WWAN

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Broadband Wireless Technology

• Higher data rates obtainable with broadband
  wireless technology
• Graphics, video, audio, HD, 3D
• Shares same advantages of all wireless services
  convenience and reduced cost
• Service can be deployed faster than fixed service
• No cost of cable plant
• Service is mobile, deployed almost anywhere

6
Introduction to wireless telephone systems

• Early Mobile Telephone System Architecture (after
  WWII)0G
• powerful transmitter
• Single central antenna and coverage (radius 50km)
• High power consumption of mobile station

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Mobile Telephone Service(MTS)

• 1947 ATT 
• 5,000 customers placing about 30 000 calls each
  week
• Equipment weighed about 36 kg
• 1965 Improved Mobile Telephone Service
• 40 000 customers
• In New York, 2 000 customers shared just 12 radio
  channels
• Wait 30 minutes to place a call

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• Cellular
• The world first automatic analogue cellular
  system was implemented by the Nippon Telephone
  and Telegraph company (NTT) in Japan in 1979. The
  cellular
• standards for each of the countries is as
  follows
• NMT (Nordic Mobile Telephone), used in Nordic
  countries, Switzerland, Netherlands, Eastern
  Europe and Russia. 1981
• U.S AMPS (Advanced Mobile Phone System) 1983
• TACS (Total Access Communications System) in the
  United Kingdom, 1985
• C-450 West Germany, Portugal and South Africa,
• Radiocom 2000 France,
• RTMI, Italy
•  Multiple systems in Japan

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Cellular concept developed by Bell Laboratory
provides the wireless communications to an entire
population.
Cellular telephone system has developed from 1st
generation analog 2nd generation digital
communications GSM 3rd generation IMT-2000,
(UMTS and CDMA2000). 4th generation LTE and
Wimax