TD-LTE-Advanced系统中一种新型8天线双码本设计方法  

A New Scheme on Precoding Codebook for TD-LTE-Advanced Systems

作　　者：刘剑飞[1,2] 许强[1,2] 曾祥烨[1,2] 王蒙军[1,2] 

机构地区：[1]河北工业大学信息工程学院,天津300401 [2]天津市电子材料与器件重点实验室,天津300401

出　　处：《北京邮电大学学报》2014年第5期45-49,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：天津市高等学校科技发展基金项目(20120715);河北省高层次人才项目(C2013001048)

摘　　要：提出了一种新型8天线双码本设计方法,有效提高了TD-LTE-Advanced系统频谱效率.该方法根据层映射的层数对码本分组,层数为1、2及5~8时,利用R8协议中4天线码本的满秩矩阵生成码本;层数为3、4时,将离散傅里叶变换矩阵与循环延迟分集技术相结合构造新码本.与R10协议中给出的8天线双码本相比,在反馈开销相同的情况下,新码本码字间距更大.仿真结果表明,在8发2收层数为2的条件下,新码本增益提高2dB以上;当信噪比为5 dB时,新码本比现有码本的频谱效率高15%以上.A new 8-antenna double codebook design scheme was proposed to improve TD-LTE-Advanced system＇s spectrum efficiency. Therein, the codebooks for differently layer number were constructed ac- cording to full rank matrix provided in Rel-8 protocol or discrete Fourier transform matrix combining with cyclic delay diversity. Analysis dedicates the new codebooks have larger intervals in codewords comparing with the 8-antenna double codebook in Rel-10 protocol. Simulation shows that the proposed method can obtain higher gain at least 2 dB for 8-transmitting and 2-receiving antennas and 2 layers; while the new codewords can increase spectral efficiency more than 15% compared with existing codebooks when signal to noise ratio is 5 dB.

关 键 词：TD-LTE-ADVANCED 预编码 双码本 频谱效率 

分 类 号：TN911.22[电子电信—通信与信息系统]