分析了中国数字电视地面广播标准中的系统帧结构，并根据信号帧头的循环特性，提出了一种性能较好的信道估计算法；
The frame structure in Chinese DTTB standard is introduced, and a channel estimation algorithm with a better performance is given according to the cycle characteristics of the signal frame head.
中国地面数字电视广播标准GB20600 - 2006是基于时域同步-正交频分复用(TDS - OFDM)系统的。
China digital television terrestrial broadcasting standard GB20600-2006 is based on TDS-OFDM (Time-Domain Synchronous orthogonal Frequency Division Multiplexing) systems.
在直升机飞行控制系统、尤其是控制增稳系统的地面仿真试验中，实施标准的、具有可重复性的杆操纵非常重要。
It is important but difficult to establish uniform and repeatable stick inputs in ground-based simulated experiments of flight control system, especially of stability and control augmentation system.
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