Personal Computers

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

By Geoff Varrall, Roger Belcher

ISBN-10: 0471229369

ISBN-13: 9780471229360

  • Third new release (3G) instant networks are within the works in Europe and Asia, and 2.5G networks that contain a few 3G good points are being rolled out within the United States
  • Hands-on consultant to integrating mobile phone or PDA/portable laptop items with current and destiny instant community hardware
  • Addresses themes comparable to caliber of carrier (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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Additional resources for 3G Handset and Network Design

Example text

IS54TDMA/IMT2000SC and IS95 CDMA/CDMA2000 are supported by a network standard known as IS41. GSM/IMT2000DS is supported by a network standard known as GSM-MAP (Mobile Application Part). 5 MHz CDMA: IMT2000DS IMT2000DS is the air interface standard promoted by Ericsson and the 3GPP1, the third-generation partnership project standards group dedicated to promoting interworking with other standards and, specifically, backward compatibility with GSM— an aspect of particular interest to existing GSM network operators.

The 6-bit group (higher-order symbol) generates a 64-chip Walsh code. The orthogonality of the 64 codes gives an increased degree of uniqueness of data on the uplink—that is, it provides selectivity. The resultant Walsh code is combined with a long code. 228 MHz. The long code is a PN sequence truncated to the frame length (20 ms). On the uplink, the long code provides user-to-user selectivity; on the downlink, one long code is used for all base stations but each base station has a unique PN offset (a total of 512 time PN offsets are available).

In 1932, George V addressed the British Empire on the shortwave world service. In practice, there has always been substantial commonality in the processing techniques used for radio and TV broadcasting and two-way and later cellular radio— a convergence that continues today. 15 m 5 6 Chapter 1 In 1939, Major Edwin Armstrong introduced FM (frequency modulation) into radio broadcasting in the United States. FM had the advantage over AM (amplitude modulation) of the capture effect. Provided sufficient signal strength was available at the receiver, the signal would experience gain through the demodulator, delivering a significant improvement in signal-to-noise ratio.

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


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