1) single rail track frequency shift signal
单轨条移频信号
2) Monorail frequency shift
单轨条移频
4) track circuit frequency-shift signal
轨道移频信号
1.
The FFT frequency analysis method is usually used in the track circuit frequency-shift signal detection, but for the reason that the detection needs a high resolving power of frequency, the FFT analysis method may affect the authenticity of the spectrum analysis.
轨道移频信号检测技术中多采用FFT的频谱分析方法,但是由于轨道移频信号的检测需要较高的频率分辨率,FFT的分析方法会影响到频谱分析的真实性。
5) Frequency shift signal
移频信号
1.
The realization of frequency shift signal based on railway circuit;
轨道电路移频信号解调实现
2.
Digital realization of frequency shift signal with continuous phase;
相位连续移频信号的数字化实现
3.
The investigation of technical solution based orthogonal frequency shift signal;
基于正交性移频信号技术方案的研究
6) frequency-shift signal
移频信号
1.
The realization of testing the frequency-shift signal of UM71 track circuit;
UM71轨道电路移频信号测试系统的实现
2.
The accuracy is not very high when time domain analysis method is used to process track circuit frequency-shift signal for the FSK auto-block system.
针对当前移频自动闭塞系统采用时域分析方法处理轨道电路移频信号显示出准确率不高等问题,引入小波变换的Mallat算法,借助Matlab,通过对实际信号的数字处理,得到用coif5小波基6层分解和相应阈值可以有效地分析和判断轨道移频信号的结论。
3.
Moreover,imitating the train running in the sections,controlling the low frequency and the carry frequency by computer could be implemented by the software,and this System could also imitate the cab signal ground signal,gather the Frequency-Shift Signal,display some kinds of informati.
系统具有区间列车模拟运行,可以实现计算机对低频、载频的控制,地面信号、车载信号模拟,区间移频信号的采集,模拟示波器显示各种信息以及对移频信号作频谱分析等。
补充资料：多普勒频移
多普勒频移
物理学术语。又称“多普勒频率”。由多普勒效应引起发射频率与运动目标反射波或散射波信号频率之间的频差。反射体引起的多普勒频移(fd)与发射频率(fs)的关系式为fd=(2Vcosθ)·fs，C为声速，V为反射体的运动速度，θ为反射体运动方向与声束指向之间的夹角。取超声诊断中的典型数据可算得血流。胎心检测中的多普勒频移(fd)均在声频范围之内，因此这类诊断仪器均可采用扬声器来监听。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条