A Unified Power Control Algorithm for Multiuser Detectors in Large Systems: Convergence and Performance
摘要
A unified approach to energy-efficient power control, applicable to a large family of receivers including the matched filter, the decorrelator, the (linear) minimum-mean-square-error detector (MMSE), and the individually and jointly optimal multiuser detectors, has recently been proposed for code-division-multiple-access (CDMA) networks. This unified power control (UPC) algorithm exploits the linear relationship that has been shown to exist between the transmit power and the output signal-to-interference-plus-noise ratio (SIR) in large systems. Based on this principle and by computing the multiuser efficiency, the UPC algorithm updates the users' transmit powers in an iterative way to achieve the desired target SIR. In this paper, the convergence of the UPC algorithm is proved for the matched filter, the decorrelator, and the MMSE detector. In addition, the performance of the algorithm in finite-size systems is studied and compared with that of existing power control schemes. The UPC algorithm is particularly suitable for systems with randomly generated long spreading sequences (i.e., sequences whose period is longer than one symbol duration).
引用
@article{arxiv.cs/0510021,
title = {A Unified Power Control Algorithm for Multiuser Detectors in Large Systems: Convergence and Performance},
author = {Farhad Meshkati and H. Vincent Poor and Stuart C. Schwartz and Dongning Guo},
journal= {arXiv preprint arXiv:cs/0510021},
year = {2007}
}
备注
Proceedings of the 43rd Annual Allerton Conference on Communication, Control and Computing, Monticello, IL, September 2005