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多小区下的MIMOOFDM的导频设计和信道估计

DOI: 10.13190/jbupt.200801.35.057, PP. 35-39

Keywords: 多小区,多入多出,正交频分复用,导频设计,信道估计

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Abstract:

为了抑制多入多出正交频分复用(MIMOOFDM)系统小区间信道估计的多址干扰,提出了一种导频设计方案.该导频可以使干扰能量均匀分布在所有信道延时采样点上,使小区间干扰白化.根据该导频的特性,提出了一种改进的频域最小二乘信道估计算法.该算法具有低计算复杂度,在信道多径延时未知的情况下仍可以有效抑制来自邻小区的干扰,使系统性能得到明显改善.通过仿真证明了导频设计的合理性和信道估计算法的正确性.

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