Open AccessRobust H ∞ Power Control for CDMA Systems in User‐Centric and Network‐Centric Manners
Author(s) -
Zhao Nan,
Wu Zhilu,
Zhao Yaqin,
Quan Taifan
Publication year - 2009
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.09.0109.0129
Subject(s) - robustness (evolution) , power control , computer science , fading , channel (broadcasting) , code division multiple access , transmitter power output , computer network , wireless network , multi user , wireless , scheme (mathematics) , electronic engineering , power (physics) , engineering , telecommunications , transmitter , biochemistry , chemistry , physics , mathematical analysis , mathematics , quantum mechanics , gene
In this paper, we present a robust H ∞ distributed power control scheme for wireless CDMA communication systems. The proposed scheme is obtained by optimizing an objective function consisting of the user's performance degradation and the network interference, and it enables a user to address various user‐centric and network‐centric objectives by updating power in either a greedy or energy efficient manner. The control law is fully distributed in the sense that only its own channel variation needs to be estimated for each user. The proposed scheme is robust to channel fading due to the immediate decision of the power allocation of the next time step based on the estimations from the H ∞ filter. Simulation results demonstrate the robustness of the scheme to the uncertainties of the channel and the excellent performance and versatility of the scheme with users adapting transmit power either in a user‐centric or a network‐centric efficient manner.