NDLI: Unified continuous- and discrete-time uplink power control problem formulation for SIR-based wireless networks

Content Provider	IEEE Xplore Digital Library
Author	Wu-Chung Su Bo-Hwan Jung Sheng-Yueh Chang Gajic, Z.
Copyright Year	2009
Description	Author affiliation: Department of Information and Communication, Yongin-Songdam College, 571-1 Mapung-dong, Yongin-si, Gyeonggi-do, Korea (Bo-Hwan Jung) \|\| Department of Electrical Engineering, National Chung-Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan, Republic of China (Wu-Chung Su; Sheng-Yueh Chang) \|\| Department of Electrical Engineering, Rutgers University, 94 Brett Road, Piscataway, NJ 08854-8058, USA (Gajic, Z.)
Abstract	The nonlinear, multiplicative form of the signal-to-interference ratio (SIR) function can be put in the linear, additive form by representing the SIR function in the logarithmic scale. Most of the well-known discrete-time power control algorithms can be reformulated into simple continuous-time dynamic equations in the logarithmic scale. A ‘surrogate derivative’ model yields the continuous-time system dynamics for each local user. It reveals that many of the most popular and powerful existing power control update laws can actually be comprehended as the discrete-time versions of the standard continuous-time control strategies. The continuous-time dynamic system formulation provides a new avenue to the uplink power control designs for wireless networks such that many existing useful control methodologies can be directly employed for solving the SIR-based wireless communication power control problems. Yates' power convergence conditions for the distributed power control (DPC), originally given for the discrete-time power control updates, are also presented in the continuous-time framework in this paper. We have shown that CDMA 2000 (IS-95) standard for mobile power updates uses a sliding mode control technique, and that the DPC algorithm is based on a linear state feedback control law.
Starting Page	1
Ending Page	5
File Size	172419
Page Count	5
File Format	PDF
ISBN	9781424433810
DOI	10.1109/SARNOF.2009.4850295
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-03-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power control Wireless networks Communication system control Sliding mode control Nonlinear dynamical systems Nonlinear equations Power system modeling Control systems Wireless communication Convergence
Content Type	Text
Resource Type	Article

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