在初始阶段， 通过设计导频序列，以实现帧级的捕获和脉冲级跟踪；
In the initiation phase, a pilot symbol sequence designed is capitalized to assure frame-level acquisition and pulse-level tracking.
本论文主要针对这个关键技术及相关的最优导频序列设计问题进行了研究。
This thesis focuses on this topic and the corresponding design issue of the optimal pilot sequence.
经过推导可以证明，此时导频序列的设计与求解一个约束不等式方程组是等效的。
It can be shown that such a design issue is equivalent to solving a system of linear inequalities.
从理论上分析了该算法所能达到的信道估计误差下限和比特误码率下限，并提出了最优叠加导频序列的设计准则。
Theoretical results of the lower bound of the bit error rate as well as the channel estimation error of the proposed algorithm were given.
根据最优化训练序列的设计方法分别讨论了两种最优化训练序列的导频格式：对角正交导频和相移正交导频，分析了在两种不同导频格式下的信道估计算法。
The channel estimation algorithm based on training-sequence method firstly introduces the definition of the training sequence and discusses the optimum training-sequence in MIMO-OFDM system.
首先介绍了单天线系统下的信道估计方法，包括基于训练序列，导频的估计算法和LS估计算法。
It introduces the estimation algorithms of single-antenna system, including training sequences, pilots estimation and LS estimation at the beginning.
同时，通过消除频域导频时域序列的自相关误差，能有效降低由DFT谱泄漏导致的信道估计误差。
At the same time, the channel estimation error, caused by the spectral leakage of DFT, can be reduced by canceling the auto-correlation error of the time-domain sequence of frequency-domain pilots.
盲信道估计算法因完全不需要发送导频或训练序列，提高了系统的频谱利用率，受到了研究人员越来越多的关注。
Because of never needing to send pilot tones or training symbols that can improve the spectrum using efficiency of the systems, blind channel estimation has gotten more and more research attention.
盲信道估计算法因完全不需要发送导频或训练序列，提高了系统的频谱利用率，受到了研究人员越来越多的关注。
Because of never needing to send pilot tones or training symbols that can improve the spectrum using efficiency of the systems, blind channel estimation has gotten more and more research attention.
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