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中文摘要：
空间谱估计算法因其在参数估计方面具有分辨性能高、稳健性好等优点被广泛应用。为提高TD—LTE低信噪比时定时的准确度，提出一种基于空间谱估计的定时偏移估计算法，利用TD—LTE上行特殊的导频结构，构造出与空间谱估计相类似的模型，利用MUSIC算法进行定时偏移估计。仿真结果表明，即使在信噪比很低的情况下，基于MUSIC的定时偏移估计算法的估计性能依然很好。与传统的算法相比，存在多径的情况下，基于空间谱估计技术的定时准确度大大提高。
英文摘要：
The spatial spectrum estimation algorithm was widely used at the aspect of the parameter estimation because of its many advantages such as higher resolution, greater robustness and so on. In order to improve the timing accuracy at low signal-to-noise ratio （SNR） of TD-LTE, a kind of timing offset estimation algorithm based on the spatial spectral sstimation was presented. By the special pilot structure of TD-LTE uplink, a model which is similar to patial spectrum estimation can be built and then use MUSIC algorithm to get the timing offset estimation. The simulations reveal that, the estimation performance is very good even in the case of low signal-to-noise ratio. Compared with the traditional algorithm, the timing accuracy will greatly improve when use a technology which is based on spatial spectral estimation algorithm.
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