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| TD-LTE-Advanced系统中一种新型8天线双码本设计方法 | |
| 引用本文： | 刘剑飞,许强,曾祥烨,王蒙军.TD-LTE-Advanced系统中一种新型8天线双码本设计方法[J].北京邮电大学学报,2014,37(5):45-49. |
| 作者姓名： | 刘剑飞 许强 曾祥烨 王蒙军 |
| 作者单位： | 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 |
| 基金项目： | 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2 dB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. |
| 关 键 词： | TD-LTE-advanced 预编码 双码本 频谱效率 |
| 收稿时间： | 2013-12-06 |
A New Scheme on Precoding Codebook for TD-LTE-Advanced Systems |
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| LIU Jian-fei,XU Qiang,ZENG Xiang-ye,WANG Meng-jun.A New Scheme on Precoding Codebook for TD-LTE-Advanced Systems[J].Journal of Beijing University of Posts and Telecommunications,2014,37(5):45-49. | |
| Authors: | LIU Jian-fei XU Qiang ZENG Xiang-ye WANG Meng-jun |
| Affiliation: | 1. School of Information Engineering, Hebei University of Technology, Tianjin 300401, China; 2. Tianjin Key Laboratory of Electronic Material and Devices, Tianjin 300401, China |
| Abstract: | 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 according 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. |
| Keywords: | TD-LTE-advanced precoding double codebook spectral efficiency |
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