A novel power control scheme for multimedia CDMA transmission

Min Kuan Chang, Chang Su Kim, C. C. Jay Kuo

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


A new power control scheme for downlink CDMA transmission by using an outage probability criterion is proposed in this research. We first analyze the outage probability when data are transmitted over shadowing and Rayleigh fading channels. Then, the power is assigned to each link of the system so that the overall outage probability is minimized subject to three constraints. They are the total transmission power at the base station, the maximum transmission power for each user, and the maximum tolerable outage probability for each user. The Newton-Raphson algorithm is modified to solve the minimization problem under these constraints. Experimental results demonstrate that the proposed algorithm is capable of differentiating QoS requirements for each link in addition to improving the throughput of the system.

Original languageEnglish
Pages (from-to)57-68
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2001
Externally publishedYes
EventEnabling Technologies for 3G and Beyond - Denver, CO, United States
Duration: 2001 Aug 222001 Aug 23


  • Newton-Raphson algorithm
  • Power control
  • QoS
  • W-CDMA

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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