Then after amplitude limiting, to be preamplified, demodulated, bandpass filtered, the doppler frequency shift signal is extracted.

经过限幅保护，接收放大，检波和带通滤波后，将多普勒频移信号提取出来。

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In this paper, the frequency spectrum and the bandwidth of the frequency shift signal with continuous and discontinuous phase are analyzed.

分析了相位连续与不连续移频信号的频谱并比较了它们的带宽。

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This paper has discussed the way of probing Doppler shift signal based on crossed phase detecting method in detail and introduced each function circuits briefly.

本文详细的论述了依据正交相位检测法提取多普勒频移信号的方法，并对各部分实现电路作一简要的介绍。

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The alleged use of special operations troops in the raid could signal a shift away from the controversial U.S.tactic of relying on long-range missile assaults to take out terrorist targets.

VOA: standard.2009.09.15

They worry that such a weakening of gun rights would signal a shift that would leave citizens defenseless against criminals and, some also argue, against potential future government tyranny or abuse.

CNN: 'Enough is enough,' Feinstein says in proposing new gun ban

To Putin-watchers, the last item does signal a shift.

ECONOMIST: The Kremlin's control freak | The

Valve is beloved by its consumers for their vast array of free updates and map packs, and the move seemed to signal a shift to a more modern model of microtransactions aimed at players who wanted every item they could get in the game at any cost.

FORBES: Team Fortress 2 Hats Amass $300K for Japan