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4 - Turbo base stations

from Part II - Cooperative base station techniques

Published online by Cambridge University Press:  03 May 2011

Emre Aktas
Affiliation:
Hacettepe University, Turkey
Defne Aktas
Affiliation:
Bilkent University, Turkey
Stephen Hanly
Affiliation:
National University of Singapore, Singapore
Jamie Evans
Affiliation:
University of Melbourne, Australia
Ekram Hossain
Affiliation:
University of Manitoba, Canada
Dong In Kim
Affiliation:
Sungkyunkwan University, Korea
Vijay K. Bhargava
Affiliation:
University of British Columbia, Vancouver
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Summary

Introduction

Cellular communication systems provide wireless coverage to mobile users across potentially large geographical areas, where base stations (BSs) provide service to users as interfaces to the public telephone network. Cellular communication is based on the principle of dividing a large geographical area into cells which are serviced by separate BSs. Rather than covering a large area by using a single, high-powered BS, cellular systems employ many lower-powered BSs each of which covers a small area. This allows for the reuse of the frequency bands in cells which are not too close to each other, increasing mobile user capacity with a limited spectrum allocation.

Traditional narrowband cellular systems require the cochannel interference level to be low. Careful design of frequency reuse among cells is then crucial to maintain cochannel interference at the required low level. The price of low interference, however, is a low frequency reuse factor: only a small portion of the system frequency band can be used in each cell. More recent wideband approaches allow full frequency reuse in each cell, but the cost of that is increased intercell interference. In both approaches, the capacity of a cell in a cellular network, with six surrounding cells, is much less than that of a single cell operating in an intercell interference-free environment. In this chapter, we survey an approach that allows the cell with neighbors to achieve essentially the same capacity as the interference-free cell.

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Publisher: Cambridge University Press
Print publication year: 2011

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