一种鲁棒的LTE-A系统中下行多用户MIMO技术创新.PDFVIP

第55 卷 第9 期 电讯技术 Vol. 55 ,No. 9 2015 年9 月 Telecommunication Engineering September ,2015 doi :10 . 3969/ j . issn. 100 1-893x. 20 15 . 09 . 007 引用格式:ZHANG Bijun ,ZHAO Songyi. A Robust DL MU-MIMO Algorithm and UE Specific SINR Compensation Mechanism in LTE-A [J ]. 电讯技术,2015 ,55 (9 ) :984-992. [ZHANG Bijun ,ZHAO Songyi. A Robust DL MU-MIMO Algorithm and UE Specific SINR Compensation Mechanism in LTE-A [J ]. Telecommunication Engineering ,2015 ,55 (9 ) :984-992. ] A Robust DL MU-MIMO Algorithm and UE Specific SINR Compensation Mechanism in LTE-A* ** ZHANG Bijun ,ZHAO Songyi (Alcatel-Lucent Shanghai Bell Co. ,Ltd. ,Shanghai 201206 ,China ) Abstract:There are two important actual restrictions for MET (Multi-user Eigen-mode Transmission ) algo鄄 rithm implementation , a typical MU-MIMO(Multi-user MIMO) algorithm in LTE-A. One is to keep sum- power restriction over all transmit antennas and the other is noise plus interference power from neighbor 2 cells ,i. e. ,滓 is pre -known and modeled as AWGN (Additive White Gaussian Noise ) at eNB. In realistic LTE-A system ,it 忆d better keep maximum power restriction of per transmit antenna and at the same time ,how 2 to model the 滓 at eNB should be considered ,thus making it approach near to the real noise plus interference experienced by UE (User Equipment ). To solve these issues ,a robust DL MU-MIMO algorithm ,i. e. ,adap鄄 tive switching based normalization on final beam-forming weights is proposed. As a result ,one UE specific SINR(Signal Interference Noise Ratio ) compensation mechanism