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Wireless telephony

  1. First US experimental cellular telephone system tested in?
    Chicago 1983
  2. Cellular concept divides
    geographical regions to cells
  3. Cellular frequency modulation
    each cell tower operates a differnet ultra high frequency (UHF)
  4. Hierichal Cell Structure
    • Macro cells(10-30 miles)
    • Micro cells(1mile)
    • Pico cells (building)
  5. All on UHF
    • analog voice
    • digital caller id
    • digital text msg
    • digital internet
  6. all cell transmissions
    on Ultra High Frequency
  7. Wideband antennas
    • Antennas built into small shapes
    • smaller and better recievers
  8. Are most cell phones land based?
    yes
  9. 1G cell phones operated
    on low UHF
  10. 2G phones
    on high UHF
  11. WHat generation do most people use today
    3G
  12. True 4G willl allow
    fast HD video
Author
xryan27x
ID
114368
Card Set
Wireless telephony
Description
telephoy
Updated

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