Title :
An Improved Exponential Distributed Power Control Algorithm for MIMO Cellular Systems
Author :
Xu Xiaodong ; Zhang Hui ; Li ingya ; Tao Xiaofeng ; Zhang Ping
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
MIMO is a key technology in the fourth generation cellular mobile communication system. Because of channel reuse, it may bring with serious co-channel interference (CCI). In order to reduce such interference, an improved distributed power control algorithm has been proposed. The exponential iteration has been taken in this algorithm, whose convergence speed is much faster than traditional arithmetic iterations. Moreover, in order to improve its robustness, the previous power in iterations has been added in current power iterative equation as a weighted feedback. In addition, this algorithm has been extended into multi-user MIMO cellular communication system. Compared to traditional algorithms, simulation results show that its iterative convergence rate is faster and its efficiency function is more efficient.
Keywords :
MIMO communication; cellular radio; channel allocation; cochannel interference; distributed control; iterative methods; multiuser channels; power control; telecommunication control; channel reuse; cochannel interference; distributed power control algorithm; exponential iteration equation; fourth generation cellular mobile communication system; multiuser MIMO cellular system; Arithmetic; Equations; Feedback; Interchannel interference; Iterative algorithms; MIMO; Mobile communication; Power control; Radiofrequency interference; Robustness;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5302344
