Personal Computers

3G Handset and Network Design - download pdf or read online

By Geoff Varrall, Roger Belcher

ISBN-10: 0471229369

ISBN-13: 9780471229360

  • Third iteration (3G) instant networks are within the works in Europe and Asia, and 2.5G networks that contain a few 3G positive factors are being rolled out within the United States
  • Hands-on advisor to integrating cellphone or PDA/portable computing device items with current and destiny instant community hardware
  • Addresses issues resembling caliber of provider (QoS) and repair point agreements (SLAs) from a instant perspective
  • Presents an in-depth evaluation of either handset and community and software

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Extra info for 3G Handset and Network Design

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TETRA is presently implementing a fairly simple bandwidth-on-demand protocol where a single user can be given one, two, three, or four time slots within a frame. This means that one relatively high rate user per RF channel or four relatively low rate users or any combination in between can be supported. A similar format is used by Motorola in their proprietary iDEN air interface (six slots in a 990 ms frame length). 4 GSM slot structure. In the United States, the AMPS 30 kHz analog channels were subdivided during the 1990s using either TDMA or CDMA.

5 kg) but harder to deliver an equivalent form factor for IS54 TDMA or CDMA products. Spectral Allocations—Impact on Handset Hardware Design Future Modulation Schemes The choice of modulation has always been a function of hardware implementation and required modulation and bandwidth efficiency. In the 1980s, FM provided—and still provides today—an elegant way of translating an analog waveform onto an (analog) RF carrier. In the 1990s, GMSK was used for GSM as a relatively simple way to digitally modulate or demodulate an RF carrier without the need for linearity in the RF PA.

Both air interfaces would have an eight-slot frame in common, both air interfaces would have eight-level PSK in common for higher bit rate applications and the 16, 32, and 64 slot frame structure for high dynamic range applications. The eight-phase PSK implementation is known as Enhanced Data Rate for GSM Evolution (EDGE) and would be implemented in an AMPS/TDMA network using either 3 × 200 kHz channels (Compact EDGE) or 12 × 200 kHz channels (Classic EDGE). A 50 kHz guard band is added on either side to provide protection to and from the IS136 30 kHz channels.

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3G Handset and Network Design by Geoff Varrall, Roger Belcher


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