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It is well known that the SAR echo can be considered as a linear FM signal,so does the echo of moving targets.The square modulus of linear FM signal has high energy centrality in the ambiguity domain. 近似为线性调频信号的SAR运动目标回波信号的模糊度函数在模糊平面内具有很高的能量集中性。
A Method for Measuring the Linearity of the Linear FM Signal 一种测量线性调频信号线性度的方法
Distortion Analysis of Linear FM Signal and Comparision among Three Kinds of Intermediate Amplifiers 关于线性调频信号的畸变分析及三种中放系统的比较
linear FM signal 线性调频信号
linear FM stepped-frequency signal 线性调频步进信号
This thesis analyzes the AM and FM signal and give a actual realization of software radio receiver. 本论文对输入的调频和调幅信号的解调进行了具体的分析。
Chaotic FM signal is similar to random signal.It has good Electronic Counter-Counter Measure (ECCM) capabilities. 混沌调频信号类似随机信号，具有较强的抗干扰性能(ECCM)。
"Such noise generally affects the amplitude of a radio wave But not its frequency, so an FM signal remains virtually unchanged. 噪音信号只影响无线电波的振幅而不影响其频率,因此,调频信号可以基本上保持不变。
As the pressure of the pregnant woman s abdomen would change if the foetus move, the FM signal is gotten by using pressure sensor. 针对胎动发生时引起母体腹壁压力改变这一生理特性,首先利用压力传感器从母腹部提取胎动信号并经采样至计算机内;
The frequency spectrum of an actual FM signal has components extending out to infinite frequency, although they become negligibly small beyond a point. 在模拟应用中，载波的频率跟随输入信号的幅度直接成等比例变化。在数字应用领域，载波的频率则根据数据序列的值作离散跳变，即所谓的频率键控。
Synchronous FM System provides broadcasters with continuous program coverage along highways or within a region under-served by a single FM signal. 摘要调频同步广播系统是仅使用一个频率，实现地域覆盖或高速路线性覆盖的调频传输系统。
A High Accurate Linear FM and PM Signal Source Based on DDS 高精度线性调频调相信号源
Abstract: Synchronous FM System provides broadcasters with continuous program coverage along highways or within a region under - served by a single FM signal. 摘要: 调频同步广播系统是仅使用一个频率，实现地域覆盖或高速路线性覆盖的调频传输系统。
the linear FM distortion is <3. 5%. 调频非线性失真小于3.;5%25
The SNR of ultrasound image could be increased by FM signal transmitting method.Especially, the SNR of deeper tissue image could be increased more, where the ultrasound signal is attenuated severely. 该成像方法能够提高超声图像的信号噪声比，尤其是提高超声衰减严重的深部组织图像的信号噪声比。
FM signals sometimes get "ducted" over great distances by various weather phenomena. FM信号有时得到"输送的"了不起的距离由各种各样的天气现象。
FM signals even bounce off the ionized trails left behind by meteors as they burn up in the atmosphere. FM信号甚而弹起被电离的足迹忘记了由飞星当他们烧在大气。
Fast Signal Processing of Sawtooth Waveform Linear FM Fix Distance System 锯齿波线性调频定距系统的快速信号处理
If two FM signals are on the same frequency at the same time, there will still be a heterodyne or beat note( unless one is6 dB stronger than the other). 通常商业电台会滤掉这些亚音频，但我们的业余电台并不进行过滤，所以我们可能能听到这个频率的音频。
If two FM signals are on the same frequency at the same time, there will still be a heterodyne or beat note (unless one is 6 dB stronger than the other). 通常商业电台会滤掉这些亚音频，但我们的业馀电台并不进行过滤，所以我们可能能听到这个频率的音频。