... default of pilot 引航员疏忽责任 reception of pilot frequency 导频接收 treatment of pilot test 中试处理 ...
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高动态环境存在较大的多普勒频移，这使得普通的GPS接收机在没有惯导辅助的情况下很难可靠工作。
There is great Doppler frequency shift under high dynamic circumstances, thus the common GPS receiver cannot work reliably without the help of inertial navigation devices.
盲估计不需要导频符号，直接利用接收的信号对信道进行估计。
Blind estimation dose not need the pilots and USES the received signal to estimate the channel state information.
从接收机复杂度和性能要求出发，导频辅助估计器为较常用的方法。
The latter is in common use while considering the complexity of the receivers and performance of the systems.
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