Adaptive BER-constraint-based power allocation for downlink MC-CDMA systems with linear MMSE receiver  

作　　者：WANG JunBo CHEN Ming WANG JinYuan CAO Zhe TANG SuWen 

机构地区：[1]Key Laboratory for Information System Security of Ministry of Education, School of Software, Tsinghua University [2]State Key Laboratory of Integrated Services Networks, Xidian University [3]College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics [4]National Mobile Communications Research Laboratory, Southeast University

出　　处：《Science China(Information Sciences)》2013年第7期72-80,共9页中国科学（信息科学）（英文版）

基　　金：supported by National Nature Science Foundation of China (Grant Nos. 61102068, 60972023,61073168);National Basic Research Program of China (Grant No. 2010 CB328000);Open Research Fund of the State Key Laboratory of Integrated Services Networks, Xidian University (Grant No. ISN12-11);China Postdoctoral Science Foundation funded Project (Grant No. 20110490389);Research Fund for the Doctoral Program of Higher Education (Grant No. 20113218120017);Open Research Fund of National Mobile Communications Research Laboratory, Southeast University (Grant No. 2010D01);Research Fund of National Mobile Communications Research Laboratory, Southeast University (Grant No. 2011A06);Open Research Fund of State Key Laboratory of Advanced Optical Communication Systems and Networks China (Grant No. 2008SH06);NUAA Research Funding (Grant Nos. NS2010091, NS2011013);National Science and Technology Important Special Project (Grant Nos. 2010ZX03003-002, 2010ZX03003-004)

摘　　要：Power allocation plays a crucial role in wireless communications. To facilitate the efficient alloca- tion of limited transmit power, in this paper, a bit error rate （BER） constraint based power allocation scheme is proposed for the downlink of multi-carrier code division multiple access （MC-CDMA） systems with linear minimum mean square error （MMSE） receiver. According to the instantaneous path gains, the proposed scheme can determine the required minimum transmit power on each channel to meet the BER constraint. The sim- ulation results show that the proposed scheme can consistently provide high-quality solutions with a very few iteration time, and also prove that it is efficient in reducing the transmit power while meeting BER constraint, and thereby improves the system performance.Power allocation plays a crucial role in wireless communications. To facilitate the efficient alloca- tion of limited transmit power, in this paper, a bit error rate （BER） constraint based power allocation scheme is proposed for the downlink of multi-carrier code division multiple access （MC-CDMA） systems with linear minimum mean square error （MMSE） receiver. According to the instantaneous path gains, the proposed scheme can determine the required minimum transmit power on each channel to meet the BER constraint. The sim- ulation results show that the proposed scheme can consistently provide high-quality solutions with a very few iteration time, and also prove that it is efficient in reducing the transmit power while meeting BER constraint, and thereby improves the system performance.

关 键 词：CDMA multi-carrier transmission MMSE BER power allocation 

分 类 号：TN929.533[电子电信—通信与信息系统] TN929.11[电子电信—信息与通信工程]