This paper presents an approach to delay testing with duplicating variable observation points, which provides a high path delay fault coverage by testing a small number of paths.
本文提供了一种使用双倍可变观测点进行时滞测试的方法，保证了只需要测试少量通路就能完成整个电路的时滞测试。
Due to the strong spatial inhomogeneity and temporal variability of atmosphere, especially water vapor , accurate modeling of path delay in GPS signals is necessary for high -accuracy position.
由于大气分布不均和不断的变化，尤其是大气中的水汽影响，使建立无线电信号路径延迟的精确模型在GPS高精度定位中非常必要。
OFDM is a high transmission technology in the wireless propagation environment. It is fitted to transmit high-speed data in the wireless channel which has multi-path delay and Doppler frequency shift.
OFDM是一种无线传播环境下的高速传输技术，适合在多径传播和多普勒频移的无线信道中传输高速数据。
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