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
接下来，用LS估计插在OFDM数据符号中规则的导频符号。
Next, LS scheme is also applied on the regular pilot tones which are inserted OFDM data symbol.
研究现有测绘部门的符号规范，实现了空间数据符号映射匹配。
Bringing forward mapping of spatial data, which is based on studying of symbol criterion in existing surveying department.
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.
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