一种基于频域分布引导插值的SOFDM信道估计方法  

A Frequency Domain Distributed Pilot Interpolation Based Channel Estimation Method for SOFDM System

作　　者：杨童[1] 周傲松[1] 

机构地区：[1]中国空间技术研究院总体部,北京100094

出　　处：《宇航学报》2008年第2期679-682,共4页Journal of Astronautics

摘　　要：针对卫星移动多径衰落环境中的SOFDM数据符号的信道估计问题,研究并提出了一种基于频域分布引导插值的信道估计方法。该方法通过在频域数据符号中插入一定数量的分布引导符号,并利用分段线性函数进行插值运算来估计数据符号的信道响应。理论分析表明,这种方法的计算流程简明,易于实现,并且仅占用了很少的系统频谱资源,便于工程应用。仿真结果表明,这种方法能够在多种卫星移动多径衰落环境下准确估计数据符号的信道响应,使信道估计的均方误差(MSE)在SNR=30dB时最低小于10-3,同时使系统的误比特率(BER)降低到10-6量级。A frequency domain Distributed Pilot Interpolation method was proposed to implement the channel estimation of SOFDM symbols in satellite mobile multipath fading environment.Above all,the distributed pilot symbols were inserted into frequency domain and interleaved with the transmitting data sequence.While receiving the SOFDM symbols,the Channel Response Value(CRV) of data symbols would be calculated via applying the Piecewise Linearity Interpolation measure.According to the theoretical analysis,it doesn't w...

关 键 词：信道估计 频域估计 分布引导插值 分段线性插值 SOFDM 

分 类 号：TN927.2[电子电信—通信与信息系统]