1) square_wave frequency modulation
方波频率调制
1.
The operation principle and modulation performance of square_wave frequency modulation on resonator fiber optic gyroscope (R_FOG) were analyzed, the limited sensitivity of R_FOG that used square_wave frequency modulation was obtained.
分析了谐振型光纤陀螺(R FOG)方波频率调制方法的工作原理和调制性能,得到了采用方波频率调制时R_FOG的极限灵敏度,并对方波频率调制和正弦频率调制两类调制方法的特性进行了比较。
2) square wave frequency modulation (SWFM)
方波频率调制(SWFM)
3) FM wave
频率调制波，调频波
4) frequency modulation of continuous wave
连续波频率调制
1.
With the combination of frequency modulation of continuous wave (FMCW) and laser crystal Nd∶YVO 4, a new scheme of ranging system is proposed.
将连续波频率调制技术与新型激光晶体Ｎｄ∶ＹＶＯ４相结合，提出一种绝对距离测量方案；就测量范围与光源相干性问题，分别论述了工作物质吸收长度和腔镜调制方式对光源相干长度的影响。
5) Frequency-modulated continuous-wave
频率连续调制波
6) Intrawave Frequency Modulation
波内频率调制
1.
Wind velocity measurements were successfully decomposed into a few empirical modes and for energy containing modes or coherent structures,their corresponding instantaneous frequency showed significant Intrawave Frequency Modulation.
结果表明,经验模态分解得到的主要含能模态物理意义清晰,相应的瞬时频率存在着明显的波内频率调制,这说明大尺度的相干结构控制着大气运动,同时这些相干结构在空间演化过程中存在着变形、耗散以及破碎等非线性作用。
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
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