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。
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。
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。
With the accelerating of the speed, frequency-shift signal detection system established based on traditional detection method is facing great challenges in China.
随着我国铁路的提速，基于传统检测方法建立的移频信号检测系统面临着极大的考验。
Test results demonstrate that this system can increase the accuracy of railway frequency-shift signal detection effectively, and has high integration level and reliability.
测试结果表明本系统能有效地提高铁路移频信号检测的准确度，具有高集成度和高可靠性。
As Doppler shift signal can significantly reflect the speed of flow, the abstracting of Doppler shift signal is the key of blood flow speed testing in a ultrasonic blood flow detector.
超声血流仪实现其测量血流速度的关键是多普勒频移信号的提取，多普勒频移信号是血流速度的真实反映。
"It will signal a dramatic shift to a cleaner, more sustainable method of providing frequency regulation on the grid," Beacon CEO Bill Capp told the GridWeek conference in Washington last week.
“这是一个巨大的改变，我们可以用更环保、更持续的方法来让电网实现频率的调整。”灯塔公司首席执行官比尔·凯普上周在华盛顿出席电网周（GridWeek）大会时说道。
Recently, he had been pictured in several magazines peering at birds-a green image that was a clear signal of a shift into the public realm.
最近有好几家杂志拍到他凝视鸟儿的照片——一个新的说法是这是他将转向公共领域的清晰信号。
The death of King Bhumibol would also signal a generational shift in Thailand: younger voices could start to be heard.
普密蓬国王之死也会预示着泰国的代际更替：更年轻者开始发出声音。
The forum appeared to signal a deliberate shift toward addressing socially conservative voters on Romney's part.
此次公开讨论向外界传递出了一个信号：为了得到保守党的支持，罗姆尼做了根本性的转变。
And with so many bloggers eagerly awaiting the opportunity to jump on any bandwagon that comes along, this subtle shift in public attitude could signal a tidal wave of negativity down the road.
而有那么多博客急不可耐地等着机会加入下一拨流行话题。现在公众对Google这种微妙的态度变化可能预示着未来负面看法的大潮。
Control pulse is coupled into this pulse shaper by wavelength division multiplexer. Nonlinear phase shift of signal laser is induced by control pulse because of cross phase modulation.
该全光脉冲整形器利用波分复用器将控制光脉冲引入光纤环形镜中，控制光脉冲由于交叉相位调制在信号光上产生了非线性附加相移。
By calculating the Doppler shift and its uncertainty in the signal covering area, the relation between Doppler shift and the position of the receiver is obtained.
通过对地面卫星信号覆盖区内的多普勒频率偏移及不确定性范围的计算，给出了卫星导航系统信号的多普勒频率偏移与接收机位置之间的关系。
The price signal in secondary market can lead to the industrial shift of listed companies, although there exists an overreaction.
二级市场的价格信号具有引致上市公司进行产业转移的功能，虽然存在着过度反应。
Signal demodulation of automatic block with audio frequency shift modulated track circuits was implemented with phase-locked loop (PLL) technique and a singe chip microcomputer.
利用锁相环(LL)窄带跟踪特性，与单片机结合，实现自动闭塞系统移频信号解调。
The results of two new studies may signal a substantial shift in the way psychiatrists and researchers think about treatment for severely depressed patients.
两项研究结果将可能从根本上改变精神病医生和研究人员在重症抑郁症患者的治疗方法上的思路。
It is an important technology to shift the frequency in digital vocal (musical) signal processing.
频移处理是数字语音(音乐)信号处理中一项十分重要的技术。
The role of phase shifter is signal phase shift from another perspective.
移相器地感化是将旌旗灯号地相位挪动一个角度。
In the communication of multiplex system, the DS signal exists Doppler frequency shift for the high dynamic situation of aerocraft.
在复合系统通信中，飞行器的高动态使扩频信号存在多普勒频移。
Magnetic resonance imaging; in phase; Opposed phase; Signal intensity; VertebraL; Chemical shift.
脊椎；化学位移成像；同相位；反相位；磁共振成像；信号强度。
Self-phase modulation of fiber does not affect the pulse shape of chaotic signal, however, its product of nonlinear phase shift can widen the chaotic signal spectrum.
结果表明：自相位调制不影响混沌信号脉冲的形状，但能产生非线性相移使混沌信号频谱展宽；
Cathie Morton, a teacher at the Clara Barton Center for Children, leads the kids in a clapping exercise to signal that it is time to shift gears and start cleaning up.
凯西·莫顿是克拉拉·巴顿儿童中心的老师，他以拍掌为信号，教孩子们改变节目并开始清理场地。
This device is constituted by CMOS transmission and CMOS shift register and is able to apply to the digital signal and analog signal at the same time.
该数据选通器主要由CMOS传输门和CMOS移位寄存器构成，能同时适用于数字信号与模拟信号。
The formulas of Doppler shift due to the reflected signal and that travelling through the ionosphere are thus derived.
在此基础上得到电离层反射信号的多普勒频移公式以及穿过电离层的信号的多普勒频移公式。
The key factors of the Relayed frequency shift jamming to it's quality are it's frequency shift amount and the time delay between the jamming pulse and the jammed signal.
决定转发移频脉冲干扰品质的是其移频量和与信号脉冲的相对延迟时间。
Concerning the problem of demodulating the weak Binary Phase Shift Keying (BPSK) signal, the demodulation method based on chaotic system was researched.
针对微弱二进制相移键控(BPSK)信号的解调问题，对基于混沌系统的解调方法进行了研究。
Concerning the problem of demodulating the weak Binary Phase Shift Keying (BPSK) signal, the demodulation method based on chaotic system was researched.
针对微弱二进制相移键控(BPSK)信号的解调问题，对基于混沌系统的解调方法进行了研究。
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