Wireless local loops

The inflexibility of the wired connection between customer and the nearest switching centre is no longer a condition that has to be accepted at face value. The pressure for greater flexibility both in bandwidth allocation but also in geographical terms opened up the new application area of Wireless Local Loop. WLL systems tend to be used by monopoly or dominant public telephone network operators in areas with poor cable infrastructure, and by new competing operators in 'deregulated markets' keen to build their own access network infrastructure. To date, Wireless Local Loops has not been given proper attention as a unique technical area. This volume provides the necessary special treatment of WLL as an area of Mobile and Wireless systems with its own constraints and technical requirements. + Covers all areas of analysis and design as well as possible services and management of Wireless Local Loops + Written by leading authorities throughout Europe, US and Japan in the field of wireless communications A timely reference resource for researchers and development engineers in telecommunications; service providers and manufacturers, as well as for lecturers and postgraduates of telecommunications courses.

Contents

• INTRODUCTION
  General Aspects of Digital Technologies for Wireless Local Loops
• PROPAGATION
  Propagation Modelling for Wireless Local Loop Channels
  Base Station Antenna Array Design for Improving Capacity in WLL
• MODULATION
  Performance of Combined Trellis Coded Quantization/Modulation over Wireless Local Loop Environment
• CODING
  Low Sequence WCDMA Codes Lead to more Economic WLL and Infostation Terminals
• CHANNEL MODELLING
  Wideband Wireless Outdoor to Indoor Local Loop Channel Models for Urban and Sub-urban Environments at 2GHz
• ACCESS DESIGN
  Development of a prototype of the Broadband Radio Access Integrated Network (Brain)
  PBX Based Access Techniques for WLL
• TRAFFIC ENGINEERING ISSUES FOR WLL
  Traffic Considerations in Comparing Access Techniques for WLL
  Traffic Based Dynamic Channel Allocation Schemes for WLL
• MANAGEMENT SYSTEMS
  Remote Management and Upgrade in a Wireless Local Loop System
• SERVICES
  Current and Future Services using WLL Systems