Study of the Optimal Switching Levels of Adaptive Modulation for a Two-user System under Constant Power Condition
In this paper we analyze the problem of optimizing the switching levels of adaptive modulation for a two-user system under constant power condition, in order to maximize the overall system throughput for a target average bit-error-rate (BER) for each user. Since the optimal switching levels depend on the probability density of the signal-to-interference-noise ratio (SINR), expression for this probability density is derived and the optimal switch levels are obtained through a Lagrange optimization technique. This approach can be readily extended to multiple-user case. It is shown by simulation that the proposed jointly optimizing method achieves the average BER target for each user while an individually optimizing method fails. The effects of these two methods and of the interference coeficients on the average system throughput are also analyzed.
Y. M. Fang L. Rong R. F. Lin Y. Du
The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310058, China Shanghai Research Center for Wireless Communications, Shanghai 200050, China
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
791-794
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）