A Unified Approach to Power control in Large Energy-Constrained CDMS Systems
| العنوان: | A Unified Approach to Power control in Large Energy-Constrained CDMS Systems |
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| المؤلفون: | Dongning Guo, Farhad Meshkati, H.V. Poor, Stuart C. Schwartz |
| المصدر: | IEEE Transactions on Wireless Communications. 7:1208-1216 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | Applied Mathematics, Matched filter, Signal-to-interference-plus-noise ratio, Transmitter power output, Multiuser detection, Computer Science Applications, symbols.namesake, Control theory, Nash equilibrium, symbols, Algorithm design, Electrical and Electronic Engineering, Decorrelation, Computer Science::Information Theory, Power control, Mathematics |
| الوصف: | A unified approach to power control is proposed for maximizing utility in terms of energy efficiency in code-division multiple access (CDMA) networks. The approach is applicable to a large family of multiuser receivers including the matched filter, the decorrelator, the linear minimum mean-square error (MMSE) receiver, and the (nonlinear) optimal detectors. It exploits the linear relationship between the transmit power and the output signal-to-interference-plus-noise ratio (SIR) for each user in the large-system limit. Suppose that each user seeks to selfishly maximize its own energy efficiency, a unique Nash equilibrium is shown to exist and be SIR-balanced, thus extending a previous result on linear receivers. A unified power control algorithm for reaching the Nash equilibrium is proposed, which adjusts transmit powers iteratively by computing the large-system multiuser efficiency, which is independent of instantaneous spreading sequences. The convergence of the algorithm is proved for linear receivers, and is demonstrated via simulation for the multiuser maximum likelihood detector. Moreover, the performance of the algorithm in finite-size systems is studied and compared with that of a conventional power control scheme, in which user powers depend on the instantaneous spreading sequences. |
| تدمد: | 1558-2248 1536-1276 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::bf9803f60e29020de235eff8792db3db https://doi.org/10.1109/twc.2008.05667 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........bf9803f60e29020de235eff8792db3db |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15582248 15361276 |
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