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- 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。
- VI-based Frequency Shift Signal Meter System 基于虚拟仪器的移频信号检测系统
- demodulator of frequency shift signal 移频信号解调器
- Digital realization of frequency shift signal with continuous phase 相位连续移频信号的数字化实现
- The demodulation of ultrasonic Doppler frequency shift signal 超声多普勒频移信号的解调
- Using Wavelet Analysis Technology for Feature Extraction of Frequency Shift Signal 利用小波分析技术提取移频信号信息特征
- frequency shift signal(l)ling 移频发信
- Frequency Shift Signal UM2000 UM2000移频信号
- frequency shift signal 频移信号
- According to the laser gain change is linear related to the frequency shift, the Doppler frequency is extracted by the signal processing. 根据激光的增益变化和频率变化成线性关系，可以对信号进行处理求出多普勒频移。
- 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.
- Massively uses the frequency Shift Keying Signal（FSK） in our country locomotive control signal to transmit each kind of locomotive speed information. 摘要 在我国机车控制信号中大量采用移频键控信号（FSK）来传送各种机车速度控制信息。
- Based on the discussion of the topological structure of a superheterodyne FM receiver, a one chip FM receiver for FSK(Frequency Shift Keying) signal has been designed. 在分析超外差 FM中频接收拓扑结构的基础上 ,设计出一种用于 FSK(移频键控 )信号的单片FM中频接收电路系统。
- This paper concerns relative technologies about carrier frequency synchronization and estimation in downlink signal in large doppler frequency shift condition. 本文对大多普勒频移情况中，下行信号载波频率同步估计的相关技术进行了研究。
- frequency shift signaling 移频发信
- frequency shift signalling 移频发信
- The earth's rotation and its motion around the sun add an appreciable frequency shift. 地球自转与地球绕日公转产生附加的频移。
- On the base of reducing the problem, this paper put forward the idea improving bonding circuit to automatic block with audio frequency shift modulated track circuit and other signal equipmemt on the Hu Hang and Zhe Gan line. 在减少自动闭塞初期故障的基础上，对沪杭、赣线移频自动闭塞与其他信号设备的结合电路，提出了改进意见和实施措施。
- The Brillouin frequency shift can be precisely measured by changing the local frequency and adopting narrow filter. 通过改变本地电信号的频率对信号进行扫描和窄带滤波，从而实现了布里渊频移的精确测量。
- This paper introduces the design of the whole circuit , inducting the picking of the shift signal,the direction discrimination and the software and the hardware of the single chip microcomputer 8031. 详细地介绍了整体电路的设计，包括位移信号的检取，细分判向及8031单片机系统的软、硬件设计。
