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.
A two-sided comb-type pilot structure generated using Golay complementary sequence and timedomain 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 phaseshift 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.
基金
国家科技重大专项(2009ZX03007-003)
国家重点基础研究发展(973)计划(2007CB310603)
安捷伦科研基金资助
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
multiple-input and multiple-output （MIMO）
single-carrier frequency-division multiple access（SC-FDMA）
Golay complementary sequence （GCS）
pilot design
channel estimation
