适用于LTE网络的干扰谱估计方法  

Interference spectrum estimation method for LTE system

作　　者：律会丽[1] 侯永宏[1] 刘伟男[1] 汪清[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《天津工业大学学报》2014年第4期48-52,57,共6页Journal of Tiangong University

基　　金：国家863计划资助项目(2011AA010201)

摘　　要：根据LTE系统信号帧结构的特点,提出一种基于PDCCH的干扰谱估计方法.该方法利用PDCCH信道调制编码方案相对固定、时频维度上规律出现的特点,通过信号解调解码去掉干扰对信号的影响,通过比较接收信号和再生PDCCH信号检测出系统中存在的干扰谱.单天线模式下,提出一种利用PDCCH译码结果的迭代信道估计方法,可以有效提高干扰谱估计精度.此外,还提出了多天线模式下干扰谱估计方案.仿真试验结果表明,本算法可以精确估计LTE系统可能存在的干扰信号频谱特性.Based on the characteristics of the LTE signal frame structure, a PDCCH-based interference spectrum estimation method is proposed. Considering the PDCCH channel appears regularly in both time and frequency domain, and it′s modulation and coding scheme constant, the proposed method removes the interference by demodulation and decoding, detects the interference spectrum exist in the system via compaves the received signal and the regenerated signal. For single antenna mode, a iterating channel estimation method is proposed by exploiting PDCCH decoding results, which can effectively improve the accuracy of interference spectrum estimation. In addition, an interference spectral estimation scheme is also proposed for multi-antenna mode, simulation results shown that the proposed algorithm can accurately track the interference spectrum exist in the LTE system.

关 键 词：干扰谱 长期演进系统 物理下行控制信道 信道估计 多天线 

分 类 号：TN929.5[电子电信—通信与信息系统]