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- continuous frequency shift 连续移频
- Study on the Technology of the Continuous Frequency Shift Using Digital Phase Shifter 利用数控移相器实现连续移频技术研究
- The Continuous Phase Frequency Shift Keying(CPFSK) signaling scheme has been widely used in mobile applications. 连续相位频移键控(CPFSK)信号广泛应用于便携式移动通信系统。
- In this model, Brillouin frequency shift is only correlative to the atmospheric altitude.The continuous distribution state of Brillouin frequency shift of low atmosphere is described in detail. 该模型中布里渊频移量只与大气高度相关,详细描述了低空大气范围内布里渊频移量的连续分布状态。
- 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。
- 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。
- 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。
- The scheme of measuring Brillouin frequency shift in fiber sensor based on edge optical filter is proposed. 提出了采用边缘光滤波器来测量光纤传感中布里渊频域的方案。
- The results show,the light frequency shift can be effectively r educed in the sharp angle laser light pumping scheme. 结果表明斜光抽运方案可以有效降低铯原子束频标中的光频移。
- The PLL part, made of PD, Loop Filter, Voltage Control Oscillator, is the key circuit of the system to produce steady and continuous frequency scanning signal. PLL锁相环路部分主要由鉴相器、环路滤波器、电压控制振荡器构成,产生稳定连续的频率扫描信号,它是本系统的关键电路。
- This paper describes the design and the test results of Gaussian frequency shift keying for bluetooth. 介绍了一种用于蓝牙芯片的高斯滤波移频键控的设计和测试结果。
- Pilot beacon devices are available in the frequency shift and demodulation modes. 飞行员烟火装置在频度变化和解调模态中是可得的。
- Objective To discuss the effect of temperature on the frequency shift of piezoelectric quartz crystal biosensor. 目的探讨温度因素对压电石英晶体传感器检测频率变化的影响。
- 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.
- In communications,a continuous frequency voltage or electromagnetic wave capable of being modulated or impressed with a second signal which carries the information to is transmitted. 通信技术中一种连续的电压或电磁波,可用另一个携带有传送信息的信号调制或叠加。
- This is because that frequency shift can also be found in the wind vortex over the Arctic Ocean, U-wind in Beaufort Sea, V-wind in East Siberian Sea and the PDO index. 因此,除热力因素外,动力因素引起的海冰的平流与该变频现象也存在一定的联系。
- In communications, a continuous frequency voltage or electromagnetic wave capable of being modulated or impressed with a second signal which carries the information to is transmitted. 通信技术中一种连续的电压或电磁波,可用另一个携带有传送信息的信号调制或叠加。
- The raindrops approach speed is determined by the frequency shift, and provides a good estimation of the winds, which carry the raindrops. 透过这个频率转变,可导出雨点移近雷达的速度,从而替乘载这些雨点的风力提供了很好的估算。
- The frequency shift can simulate the emissive power of the base station very well and is good to the respiratory effect. 频移可以很好地模拟基站发射功率,这对呼吸效应也有好处。
- Blind FRESH (frequency shift filter) can separate desired signals from spectrally over lapping interference by exploiting cyclostationarity. 摘要利用循环平稳特性可以进行信号提取,频移滤波器对循环频率误差较为敏感。