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中文摘要：
针对超宽带信道的稀疏特性，基于MB—OFDM系统提出一种基于匹配追踪的时域信道估计算法（MP—TD）．首先利用OFDM数据块的循环卷积特性建立一种时域模型，然后采用匹配追踪（MP）算法探测出非零抽头的位置，最后利用非零抽头位置信息降低了估计维数并通过时域方法估计出信道．仿真证实了算法的有效性．
英文摘要：
A novel channel estimation algorithm was proposed for MB-OFDM Ultra Wide-Band systems based on matching puisuit by exploiting the sparse property of channel impulse response. Firstly, a model in the time domain was established by utilizing the cyclic convolution property of the OFDM block. Then the nonzero taps were detected by exploiting the Matching Pursuit （MP） algorithm. Finally, the model was simplified and the channel parameters were gained by LS algorithm in the time domain. And the simulation results demonstrated the efficiency of the algorithm.
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