Dynamic Programming Based Power Control Algorithm with Primary User QoS Guarantee for Cognitive Radio Networks  

作　　者：LIANG Hui ZHAO Xiaohui 

机构地区：[1]College of Communication Engineering, Jilin University, Changchun 130012, China

出　　处：《Chinese Journal of Electronics》2013年第2期353-358,共6页电子学报（英文版）

基　　金：This work is supported by the National Nature Science Foundation of China （No.61171079）.

摘　　要：To maximize the average rate in a long- term scope while guarantee primary user＇s QoS demand is a new key issue in cognitive radio systems. A dynamic programming based power control algorithm with the con- sideration of primary user＇s QoS by a rate loss constraint criterion is proposed in this paper. In the proposed al- gorithm, the occupancy for each subcarrier by primary users is modeled as a discrete-time Markov chain. And the concept of rate loss constraint is defined which is used to guarantee primary user＇s desired rate. Then the dy- namic programming framework with rate loss constraint of this problem is formulated, which is a function of the primary user occupancy state, the system channel gains and the remaining power budgets for the cognitive radio transmitters. At last, we give a solution for the problem. Simulation results show that the proposed algorithm can obtain a maximum average data rate over a finite time horizon and effectively guarantee primary users＇ QoS.

关 键 词：Cognitive radio Power control Dynamic programming Rate loss constraint. 

分 类 号：TN929.533[电子电信—通信与信息系统] TN915[电子电信—信息与通信工程]