宽带MIMO-OFDM系统信道估计算法研究  

Channel Estimation Algorithms for Broadband MIMO-OFDM Systems

作　　者：王东明[1] 高西奇[1] 尤肖虎[1] 韩冰[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《电子学报》2005年第7期1254-1257,共4页Acta Electronica Sinica

基　　金：国家自然科学基金重大项目"未来移动通信基础理论与技术研究"(No.60390540);国家863高技术研究发展计划(No.2003AA123310)

摘　　要：本文提出了MIMO-OFDM系统中基于LS准则的参数化信道估计方法(LSPCE),推导出其MSE性能的下界并给出一种最优导频序列.为了降低复杂度,本文还提出了一种迭代的算法,它利用有限冲击响应信道的抽头之间的相关性从噪声中提取出信道信息并同时估计出多径时延.仿真和分析表明,相比传统的LS信道估计算法,这种基于参数化的信道估计算法可以大大提高信道估计的精度,接收端的检测性能接近理想信道估计的性能.A least-square parametric channel estimator （LSPCE） for broadband multi-input multi-output orthogonal frequency division multiplexing （MIMO-OFDM） systems is proposed.The MSE bound on LSPCE is derived and the optimal pilot sequences are also given. In order to reduce the complexity, we present an iterative algorithm to extract the channel information from its noisy vension accurately by utilizing the correlation of the taps of finite impulse response （FIR） filter channel model. Simulation results show that the proposed channel estimation gives much better performance than conventional LS algorithm and the detection performance is nearly optimal.

关 键 词：MIMO-OFDM 信道估计 稀疏信道 多径时延估计 

分 类 号：TN911[电子电信—通信与信息系统]