In the research on data symbol recognition, we design a two-stage multi-features classifier with threshold, which improves recognition rate, and at same time avoid adding much computing time.
在数据符号识别方面，本文所研究的带阙值的两级多特征分类器的设计思想在提高了字符识别效率的同时，又避免引入过多的系统开销。
参考来源 - 基于手势和两级分类器的联机手写公式识别·2,447,543篇论文数据，部分数据来源于NoteExpress
信道估计方法大致可分为数据符号辅助的信道估计和盲信道估计。
Channel estimation methods can be broadly divided as the data symbol auxiliary and blind channel estimation.
OFDM系统存在对数据符号同步和载波频率偏移极为敏感的问题。
The OFDM is sensitive to the synchronization of the OFDM symbol and the carriers' frequency excursion.
在此情况下可以对输入数据符号进行加权处理，从而得到一类MS K信号，这类MS K信号仍为等幅波、相位仍保持连续。
In these situations, one might apply additional input pulse weighting to form a class of MSK type signals which still maintain constant envelope and continuous phase.
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