microcells - Maxwell

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8. Digital Cellular Systems • Advantages of Digital Cellular Radio • Conversion of AMPS to TDMA • TDMA Voice Channel • TDMA Control Channels • Privacy and Security in Digital Cellular Radio • Dual-Mode Systems and Phones • Data Communication with Digital Cellular Systems
• Recent advances in data compression and voice coding have reversed the conventional wisdom about bandwidth. • It is now possible to transmit a digitized voice signal in less bandwidth than is required for an analog FM signal. This removes the last big obstacle to digital communication. • Digital system still tend to be more complex than analog, but large-scale integrated circuits have made it possible to build complex systems at low cost and in small packages. • Analog cellular radio can be seen as the first generation of wireless communication. Digital systems, are the second.
Page 1 and 2: 3.6. Cell-Site Equipment • Traffi
Page 3 and 4: Fig. 3. 7 Cellular base station [1]
Page 5 and 6: • Fig. 3.8 Cellular radio system
Page 7 and 8: Traffic and Cell Splitting • The
Page 9 and 10: • Phone traffic is defined in erl
Page 11 and 12: Microcells, Picocelles and Repeater
Page 13 and 14: Fig. 3.9 Microcell site [1]
Page 15 and 16: • A microcell is often under the
Page 17 and 18: • The main cell site up-converts
Page 19 and 20: • Sometimes the problem is not ex
Page 21 and 22: 3.7. Fax and Data Communication Usi
Page 23 and 24: • The greater robustness results
Page 25 and 26: Cellular Digital Packet Data (CDPD)
Page 27: • When overhead is taken into acc
Page 31 and 32: • They lend themselves to time-an
Page 33 and 34: • In the last two lines of Table
Page 35 and 36: Fig. 10.14 TDMA frame [1] • Each
Page 37 and 38: • The data rate available for eac
Page 39 and 40: TDMA Control Channels • The IS-13
Page 41 and 42: Privacy and Security in Digital Cel
Page 43 and 44: Data Communication with Digital Cel
Page 45: References • [1] R. Blake, "wirel

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