Modeling of DS-CDMA transmit power control in a fast fading channel with antenna diversity

Akihito Katoh, Fumiyuki Adachi

Research output: Contribution to journalArticlepeer-review

Abstract

In DS-CDMA mobile radio communications systems, transmit power control (TPC) is indispensable to regulate the variations in the received signal power produced by multipath fading. However, a practical TPC raises and lowers the mobile transmit power only at discrete time instants (the TPC rate is on the order of 1-2 kHz) and by a finite step size of the order of 1 dB. Therefore, TPC cannot completely compensate the received signal power variations and hence, the transmission performance degrades in a fast fading channel. The objective of this paper is to understand how TPC acts in a fast fading channel with antenna diversity reception and, based on this understanding, to model the TPC operation.

Original languageEnglish
Pages (from-to)769-776
Number of pages8
JournalIEICE Transactions on Communications
VolumeE86-B
Issue number2
Publication statusPublished - 2003 Feb

Keywords

  • DS-CDMA
  • Fading
  • Mobile radio communications system
  • Transmit power control

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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