The phase detecting error caused by local oscillator frequency drift and non-synchronization of measurement signal and gate signal is eliminated and the measurement speed is improved at the same time.
该方法可以有效的消除因本振信号频率漂移及闸门信号与被测信号的非同步引起的测相误差，同时提高了测量速度。
Next, minimum mean square error (MMSE) filters are applied to the received signal to recover single user signal wave thus implementing user separation and frequency synchronization at the same time.
然后，对接收到的信号应用最小均方误差滤波恢复单用户信号波形，从而同时实现了多用户信号分离及频率同步；
In the research and design of signal source, the key technology of the nature of broad spectrum, the same initial phase, and multi-frequency synchronization sending has been researched.
在信号源的研究与设计中针对信号源的广谱性质、起始相位同步、多频同步发送等关键技术进行了研究与设计。
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