A Distributed SIR-Based Power Control Algorithm for WCDMA Systems Conference Paper

abstract

• Power control has been an important issue in multiple access systems allowing more users to share the system resources. The capacity of the WCDMA system is limited by the total interference, called multiple access interference (MAI). An efficient power control algorithm is always required to improve the system performance. In this paper, we propose a distributed, first order power control algorithm. The proposed algorithm uses an exponential function with a modified form of the LMS algorithm in order to achieve a better speed of convergence. We examine the proposed algorithm for time varying multipath Rayleigh fading environment. We compare the performance of the proposed algorithm and the 3GPP standard algorithm. We demonstrate that the proposed algorithm achieves better convergence and saves on the signal-to-noise ratio (SNR) required to achieve a certain performance. We also demonstrate that the proposed algorithm works well for different mobile speeds with a continuously changing channel.

name of conference

• IEEE Vehicular Technology Conference

authors

• Ghrayeb, Ali

published proceedings

• IEEE Vehicular Technology Conference

author list (cited authors)

• G. P. Mandhare, .., & A. Ghrayeb.

publication date

• January 2006

published in

• n1090-3038ISSN  Journal

keywords

• 3g Mobile Communication
• Centralized Control
• Communication System Control
• Convergence
• Least Squares Approximation
• Mobile Communication
• Multiaccess Communication
• Multiple Access Interference
• Power Control
• System Performance

start page

• 1

end page

• 5