Power control with partially known link gain matrix

Riku Jäntti, Seong Lyun Kim

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


In power control, the convergence rate is one of the most important criteria that can determine the practical applicability of a given algorithm. The convergence rate of power control is especially important when propagation and traffic conditions are changing rapidly. To track these changes, the power control algorithm must converge quickly. The purpose of this paper is to generalize the existing power control framework such that we can utilize partially known link gain information in improving the convergence speed. For the purpose, block power control (BPC) is suggested with its convergence properties. BPC is centralized within each block in the sense that it exchanges link gain information within the same block. However, it is distributed in a block-wise manner, and no information is exchanged between different blocks. Depending on availability of link gain information, a block can be any set of users, and can even consist of a single user. Computational experiments are carried out on a direct-sequence code-division multiple-access system, illustrating how BPC utilizes available link gain information in increasing the convergence speed of the power control.

Original languageEnglish
Pages (from-to)1288-1296
Number of pages9
JournalIEEE Transactions on Vehicular Technology
Issue number5
Publication statusPublished - 2003 Sept

Bibliographical note

Funding Information:
Manuscript received February 25, 2002; revised April 16, 2003. The work of R. Jäntti was supported by the Nordic Academy for Advanced Study (NORFA) and the Academy of Finland under Grant 51521. This paper was presented in part at IEEE ICC, New York, May 2002.

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


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