Power allocation for OFDM-based cognitive heterogeneous networks  

作　　者：FEI ZeSong XING ChengWen LI Na HAN YanTao DANEV Danyo KUANG JingMing 

机构地区：[1]School of Information Science and Engineering,Beijing Institute of Technology [2]Department of Electrical Engineering(ISY),Linkping University

出　　处：《Science China(Information Sciences)》2013年第4期99-108,共10页中国科学（信息科学）（英文版）

基　　金：supported in part by Sino-Swedish IMT-Advanced and Beyond Cooperative Program (Grant No.2008DFA11780);Huawei Technologies Co.,Ltd,China-EU International Scientific and Technological Cooperation Program (0902);National Natural Science Foundation of China (Grant No. 61101130)

摘　　要：In this paper, the capacity maximization and the spectrum utilization efficiency improvement are investigated for the Pico cells in broadband heterogeneous networks. In frequency-reuse model, the users attached to Macro base station are usually viewed as primary users, and those attached to Pico base station should be regarded as cognitive radio （CR） users. As both the primary users and the CR users communicate in parallel frequency bands, the performance of the system is limited by the mutual inter-carrier interference （ICI）. In order to control ICI and maximize the achievable transmission rate of the CR users, an effective power allocation scheme is proposed to maximize the transmission rate of the CR users under a given interference threshold prescribed by the primary users. By transforming this suboptimal solution into an innovative matrix expression, the algorithm is easier to perform in practice. The simulation results demonstrate that the proposed algorithm provides a large performance gain in Pico cell capacity over the non-cooperative and equal power allocation schemes.In this paper, the capacity maximization and the spectrum utilization efficiency improvement are investigated for the Pico cells in broadband heterogeneous networks. In frequency-reuse model, the users attached to Macro base station are usually viewed as primary users, and those attached to Pico base station should be regarded as cognitive radio （CR） users. As both the primary users and the CR users communicate in parallel frequency bands, the performance of the system is limited by the mutual inter-carrier interference （ICI）. In order to control ICI and maximize the achievable transmission rate of the CR users, an effective power allocation scheme is proposed to maximize the transmission rate of the CR users under a given interference threshold prescribed by the primary users. By transforming this suboptimal solution into an innovative matrix expression, the algorithm is easier to perform in practice. The simulation results demonstrate that the proposed algorithm provides a large performance gain in Pico cell capacity over the non-cooperative and equal power allocation schemes.

关 键 词：heterogeneous network orthogonal frequency division multiple access cognitive radio intercarrier interference resource allocation 

分 类 号：TN919.3[电子电信—通信与信息系统]