LTE-Advanced系统中的增强控制信道设计  

Enhanced PDCCH in LTE-Advanced

作　　者：焦慧颖[1] 

机构地区：[1]工业和信息化部电信研究院通信标准研究所

出　　处：《现代电信科技》2013年第3期33-36,41,共5页Modern Science & Technology of Telecommunications

基　　金：重大专项2011ZX03003-001-01 IMT-Advanced多天线增强技术研发支持

摘　　要：LTE Release 8中的下行控制信道和数据信道时分复用,并且占用系统的全部带宽,不能很好的利用频率协调机制来降低异构网络中下行控制信道的干扰,而且随着多天线阵列的普及,下行控制信道不能像数据一样获得波束赋形的增益。因此在LTE Release 11中引入了增强控制信道这一重要特性,将控制信道在数据信道的位置发送,采用与数据信道相同的预编码方式获得波束赋形和分集的增益,同时也增加了异构网络中控制信道的干扰灵活性,并且保证很好的覆盖性能。文章介绍了标准中增强控制信道的设计。The downlink control channel in LTE Re- lease 8 is time division multiplexing with downlink data channel, and occupies the whole bandwidth. It is difficult to reduce interference of downlink control channel of heterogeneous network by using frequen- cy coordination scheme. At the same time, with the increase of the antenna number, the downlink con- trol channel cannot acquire the beamforming gain like data. So enhanced PDCCH is introduced as one of the key features of LTE release 11, which is transmitted frequency division multiplexing with da- ta, which can acquire similar beamforming and di- versity gain, increase the interference coordination flexibihty of control channel in heterogeneous net- work, and also promise good coverage. In the paper the detailed standardized design of the ePDCCH is introduced.

关 键 词：增强控制信道 LTE—Advanced 搜索空间 

分 类 号：TN929.533[电子电信—通信与信息系统]