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基于LSTBC-OFDM系统的信道估计简化算法

Improved channel estimation method for LSTBC-OFDM
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摘要 针对MIMO-OFDM通信系统中基于导频的常规信道估计算法存在矩阵求逆过程,使算法计算量过大的现象,提出了一种基于最小二乘(LS)的信道估计简化算法。该算法利用分层结构的空时分组编码技术(LSTBC)和优化设计的导频符号,避免了LS算法的矩阵求逆过程,大大降低LS算法的复杂度和运算量。仿真结果表明,该方法在运算复杂度显著降低的情况下,仍可取得和原算法同样的性能结果。 Traditional pilot-symbol aided channel estimation for MIMO-OFDM system suffers great compu tational work. An improved LS channel estimation method is proposed. The method avoids matrix inversioin by utilizing layered space-time block code（LSTBC） and optimally designing the pilot symbols, then the complexity and computational work of LS method is greatly reduced. Simulation results show that the performance of the improved method is same as the conventional one.
作者 胡静 廖桂生 刘宏清
机构地区 西安电子科技大学雷达信号处理国家重点实验室
出处 《系统工程与电子技术》 EI CSCD 北大核心 2006年第3期454-457,共4页 Systems Engineering and Electronics
基金 国家自然科学基金(60172028) 高等学校博士学科点专项基金(20010701008)资助课题
关键词 正交频分复用 多输入多输出 空时编码 信道估计 OFDM MIMO space-time code channel estimation
分类号 TP911.5 [自动化与计算机技术]
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参考文献11

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共引文献11

系统工程与电子技术
2006年 第3期

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