LTE-A系统PUCCH传输分集信道估计算法  

Channel estimation for PUCCH transmit diversity in LTE-A

作　　者：李小文[1] 邓雪梅[1] 倪鑫[1] 孙鹏[1] 

机构地区：[1]重庆邮电大学重庆市移动通信技术重点实验室,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2015年第3期306-311,共6页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家重大专项项目(2011ZX03001-002;2011ZX03001-003-01;2012ZX03001-009);重庆邮电大学青年项目(A2012-89;A2012-91)~~

摘　　要：针对先进的长期演进(LTE-advanced,LTE-A)系统中,物理上行链路控制信道(physical uplink control channel,PUCCH)采用空间正交资源传输分集方式发送上行控制信息时,两发射天线端口通过使用不同的循环移位使参考信号正交的特点,提出一种特殊形式的信号模型,并描述了基于最小二乘(least square,LS)和三次样条插值,基于LS和离散余弦变换(discrete cosine transform,DCT)插值以及基于最小均方误差(minimum mean square error,MMSE)和DCT的3种复杂度依次增加的信道估计算法。仿真结果表明,基于MMSE和DCT的信道估计算法性能最优。In LTE-advanced system, when space orthogonal-resource transmit diversity（SORTD） is used on PUCCH, the UE transmits the same control information from different transmit antennas with different cyclic shifts. By exploiting the properties of reference signals （RS）, we find a special form of signal model. Based on the special form, firstly, we propose a low complexity channel estimator based on LS and spline. Then, to improve the interpolation performance we propose a LS and DCT based approach. For their limited performance, we derive a more accurate channel estimator based on MMSE and DCT. Finally, the performance of the proposed channel estimation is verified via simulation. As a result, the MMSE and DCT based approach has the best performance.

关 键 词：先进的长期演进(LTE-A)技术 空间正交资源传输分集(SORTD) 离散余弦变换(DCT) 信道估计 

分 类 号：TN929.5[电子电信—通信与信息系统]