调频

Whats more, LFM signal is insensitive to Doppler frequency shift, whichmeans the signal processing is easy.

论文研究了线性调频脉冲信号的特征及其数字压缩技术，进行了理论分析仿真。

In the first time upsurge of multimedia, if you have times doubler fast CD driver and sound of frequency modulation complex get stuck, perfectly.

在多媒体的第一次热潮中，假如你拥有一台双倍速的光盘驱动器及调频合成的声音卡，就相当不错了。

According to the characteristic of the reverse range shift induced by the upslope and downslope of triangular FMCW modulation, the upslope and downslope are imaged, respectively.

调频连续波雷达的低发射功率使其具有低截获、隐蔽性好、抗反辐射导弹能力强的特点。

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Learn to build a simple FM transmitter that can be used to eavesdrop on your workmates or friends.

学习构建一个简单的调频发射器，可以用来窃听你的工友们或朋友。

That the Motorola company produces apply the main body of a book , the reality having given the carried communication making use of one kind of high sensitivity electric line of force that these components design out a wave filter applies a circuit.

本文采用Motorola公司生产的调频通信器件混频器、解调器、振荡器等的特性、结构、原理及典型应用，给出了利用这些器件设计的一种高灵敏度电力线载波通信滤波器的实际应用电路。

An electron tube used to amplify or generate ultrahigh frequency by means of velocity modulation .

在磁表面存储技术中一种表示数据的方法，例如改进型调频制。

Abstrac t : The emissive frequency of the general frequency modulation broadcast transmitter is fixed.

一般的调频广播发射机，发射频率是固定的。

This paper describes a feasible calibration method, its basic principle for calibrating is: A certain function relationship is existed in equivalent inductance L of coil and the distance x between the object to be measured and the sensor coil, the measurements can be conducted with this function relationship by using frequency modulation. The calibrating system consists of measuring electric circuit, high stable voltage power supply, digital frequency meter, the conductor to be measured and the calibrated displacement sensor.

文中叙述了一种较为可行的标定方法，其标定的基本原理为：线圈的等效电感L和被测物体与传感器线圈的距离x存在一定的函数关系，利用这种函数关系用调频法进行测量，标定系统由测量电路、高稳定度稳压电源、数字频率计、被测导体及被校位移传感器组成。

Based on the theory of radar, the essentiality of LFM signal was discussed.

首先从雷达的基本理论出发，讨论了采用线性调频信号的必要性。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。