Evolution of the power control techniques for DS-CDMA toward 3G wireless communication systems

  • Authors:
  • Dejan M. Novakovic;Miroslav L. Dukic

  • Affiliations:
  • Faculty of Electrical Engineering, University of Novi Sad, Belgrade, Yugoslavia;-

  • Venue:
  • IEEE Communications Surveys & Tutorials
  • Year:
  • 2000

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Abstract

In this article we present a survey of the power control techniques for modern wireless DS-CDMA communication systems. Power control is the single most important system requirement for DS-CDMA systems. Well-defined power control is essential for proper functioning of the DS-CDMA system. In the absence of power control the effect of near⁄far phenomena is dominant, and the capacity of the DS-CDMA mobile system is very low, even lower than that of mobile systems based on FDMA. However, when the power control in DS-CDMA systems exists, it allows users to share resources of the system equally between themselves. Also, with a proper power control it is possible to lower total transmitting power of the mobiles and prolong the battery life.