| 一种适用于MIMO SC-FDMA系统的高效时域信道估计 |
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| 引用本文： | 王海明.一种适用于MIMO SC-FDMA系统的高效时域信道估计[J].中国科学技术大学学报,2009,39(10). |
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| 作者姓名： | 王海明 |
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| 作者单位： | 东南大学毫米波国家重点实验室,江苏南京,210096 |
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| 基金项目： | 国家科技重大专项，国家重点基础研究发展(973)计划，安捷伦科研基金 |
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| 摘 要： | 提出一种由Golay互补序列构造双边梳状导频的低开销时隙结构和时域信道估计方案,其适用于时变频率选择性衰落信道中的MIMO SC-FDMA系统.结合左循环移位的快速周期Golay相关和右循环移位的快速周期Golay相关,提出一种在时域中高效实现MIMO信道估计的对称格形结构.对比采用快速傅里叶变换的频域信道估计方案,采用该格形结构实现时域信道估计,其计算复杂度显著降低.低复杂度能降低处理器功耗,有助于实现"绿色通信".仿真结果表明,在高速移动信道中,对于信道估计均方误差和平均误码率性能,提出的方案具有优势.
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| 关 键 词： | 多入多出系统 单载波频分多址接入 Golay互补序列 导频设计 信道估计 |
Efficient time domain channel estimation for MIMO SC-FDMA systems |
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| WANG Hai-ming.Efficient time domain channel estimation for MIMO SC-FDMA systems[J].Journal of University of Science and Technology of China,2009,39(10). |
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| Authors: | WANG Hai-ming |
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| Abstract: | A two-sided comb-type pilot structure generated using Golay complementary sequence and time-domain channel estimation is proposed for MIMO SC-FDMA systems under time-varying frequency selective fading channels. Both left-shift and right-shift fast periodic Golay correlation lattices are combined as a symmetrical lattice. It can be used to efficiently implement periodic correlations of phase-shift and sequence orthogonal comb-type pilot blocks in the time domain. Employing this special lattice, computational complexities are significantly reduced. Low-complexity algorithm can reduce power consumption of a processor, which meets one of the requirements of green communications. Simulation results demonstrate the performance merits of the proposed scheme. |
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| Keywords: | multiple-input and multiple-output (MIMO) single-carrier frequency-division multiple access (SC-FDMA) Golay complementary sequence (GCS) pilot design channel estimation |
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