Error statistics of closed-loop power control in Multirate DS-CDMA cellular systems

Li-Chun Wang*, Chih Wen Chang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

In this paper, we investigate the error statistics of the close-loop power control scheme with variable spreading factors for the multi-rate services in the third generation wideband CDMA (WCDMA) system. We demonstrate that the long scrambling pseudo-noise code, besides its well known feature in differentiating users and base stations, can improve power control false command over a frequency-selective fading channel as well. Our computer simulation results indicate that the SIR measurement error can be reduced by 3 dB in a typical case, and the power control false command can be reduced from 27 % to 10 % in comparison to using pure short Walsh codes. It will be shown that the close-loop power control error is a composite function of spreading factor, target E, / N9 and Doppler frequency, The statistics of closed loop power control false command can be easily characterized by a Bernoulli distribution with a parameter provided by our results.

Original languageEnglish
Title of host publicationIEEE Wireless Communications and Networking Conference, WCNC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages712-716
Number of pages5
ISBN (Electronic)0780373766
DOIs
StatePublished - 17 Mar 2002
Event2002 IEEE Wireless Communications and Networking Conference, WCNC 2002 - Orlando, United States
Duration: 17 Mar 200221 Mar 2002

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
Volume2
ISSN (Print)1525-3511

Conference

Conference2002 IEEE Wireless Communications and Networking Conference, WCNC 2002
CountryUnited States
CityOrlando
Period17/03/0221/03/02

Keywords

  • Close-Loop Power Control
  • Scrambling Code
  • Power Control Error
  • Power Control False Command
  • Walsh code

Fingerprint Dive into the research topics of 'Error statistics of closed-loop power control in Multirate DS-CDMA cellular systems'. Together they form a unique fingerprint.

Cite this