Optimal pilot sequence design for multiple-input multiple-output OFDM systems

被引：0
作者：
Hu, D [1 ]
Yang, LX [1 ]
He, LH [1 ]
Shi, YH [1 ]
机构：
[1] SE Univ, Dept Radio Engn, Nanjing 210018, Peoples R China
来源：
GLOBECOM '05: IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-6: DISCOVERY PAST AND FUTURE | 2005年
关键词：
channel estimation; multiple-input multiple-output; OFDM; pilot sequence;
D O I：
暂无
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In orthogonal frequency division multiplexing (OFDM) systems, some subcarriers at the borders of the allocated bandwidth are usually used as guard band. Since these subcarriers, which are often referred to as virtual subcarriers, are not used for transmission, approach of conventional uniformly placed pilot tones is not applicable anymore in some situations. Therefore, it is necessary to derive the optimal pilot sequences based on the nonuniform placement of pilot tones. In this paper, we first compute the mean square error (RISE) of the least squares (LS) channel estimate for multiple-input multiple-output (MIMO) OFDM systems. Then, based on nonuniform pilot tone placement, we derive the optimal pilot sequences with respect to this RISE. Simulation results demonstrate the effectiveness of the proposed approach.
引用
收藏
页码：2260 / 2264
页数：5
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