The received signal from target of linear frequency-modulated continues wave (LFMCW) radar is a linear frequency-modulated (LFM) signal.
线性调频连续波雷达对于匀速运动目标的回波经过混频以后还是一个线性调频信号(LFM)。
Based on positioning principle of rotating frequency-modulated disk, designing characteristics of patterns for some-model guided sight instrument are studied.
基于旋转调频调制盘的定位原理，研究了某型号瞄准制导仪中调制盘图案的设计特点。
Frequency of modulated signals is extracted from frequency-modulated signals by using the relationship between the modulus of wavelet transform coefficient and the singular exponent.
利用小波变换系数的模值与信号奇异性指数之间的关系，从调频信号中提取出调制信号的频率。
The paper introduces an advanced hydraulic pump/motor tester for mine, combining frequency-modulated control with power recovery techniques, and an engineering application example is given.
介绍采用变频调速和功率回收加载技术的新型矿用液压泵和液压马达试验系统，并有应用实例。
According to the moving target's echo characteristics acquired by the frequency-modulated stepping radar, the envelope migration is firstly carried out for the subset of the compressed pulse.
根据调频步进雷达运动目标的回波特性，首先对压缩后的子脉冲进行包络平移。
A combination method based on secondary mixing and MTD (Moving target detection) processing is proposed for high-speed targets detection in linear frequency-modulated continuous wave (LFMCW) radar.
针对LFMCW雷达高速运动目标的检测问题，本文提出了一种二次混频与MTD处理相结合的方法。
In order to obtain enough bandwidth, HF radars use an irregularly frequency modulated waveform.
为了获得足够的带宽，雷达采用一种非规则频率调制的波形。
An optoelectronic detection system based on the optical feedback effect in a direct frequency modulated laser diode is developed.
设计并研制了一套基于光反馈效应的直接频率调制激光二极管光电探测系统。
The invention can alternatively be embodied in a frequency modulated radar system, for which each set of signals comprises a sequence of modulation patterns.
本发明可替代地具体实施为频率调制雷达系统，其每组信号包括调制图案的序列。
This method possesses a powerful property to extract the modulated frequency of resonant frequency band overall.
该方法能将各共振响应频带的调制频率提取出来。
At present, proximity high frequency RFID (Radio frequency Identification) system based on inductive coupling load modulated technology is used worldwide.
目前，国内外广泛应用的RFID系统是基于感应耦合负载调制技术的近距离高频读写系统。
The radar controller is then arranged to modify a given modulation pattern in dependence on the characteristic frequency of the signal being modulated.
雷达控制器则设置成根据被调制的信号的特征频率修改给定的调制图案。
In this paper, the evolutionary random excitations acting on structures are assumed to be non uniformly modulated, i. e. the modulation functions depend both on time and frequency.
本文假定结构受到非均匀调制的演变随机激励，亦即其调制函数是时间与频率二者的函数。
The paper presents a new radar system based on frequency Modulated Interrupting Continuous Wave (FMICW) by exploiting the hopping frequency technique to improve the capability of HFGWR.
为提高高频地波雷达的抗干扰能力，提出了一种在线性调频中断连续波的基础上基于跳频技术的新高频地波雷达体制。
For wireless digital communications, digital user signal is usually at first converted into analog domain and then modulated to radio frequency by one or two steps.
对于无线数字通信而言，通常将数字用户信号首先转换到模拟域中，然后通过一个或两个步骤将其调制到无线电频率。
Then the primitive color holograms are modulated in the frequency domain to reconstruct object by original reference waves.
第二步是分别对分色全息图在频域进行调制以实现用原参考光真实再现原始物光波。
To solve this problem, a new method of frequency offset estimation is proposed. This method adopts modulated data elimination technique and the segmental correlation FFT algorithm.
为了解决这个问题，提出了一种新的频率估计算法，采用扩频调制信息消除策略和分段相关FFT频谱分析技术实现频偏精确估计。
To estimate carrier frequency of digitally modulated signal whose modulation type is unknown, a carrier frequency estimation method for digitally modulated signal is proposed.
针对未知调制类型情况下数字调制信号的载波频率估计问题，提出了一种适用于数字调制信号的载波频率估计方法。
This paper introduces how DDS techniques can be extended to produce frequency modulated(FM)waveforms as well as many types of digitally modulated waveforms.
介绍了如何利用DDS技术来产生调频波形及其他的数字调制波形；
The problem of estimating the parameter of a linear frequency modulated signal embedded in additive noise is considered.
研究了加性噪声中线性调频信号的参数估计问题。
Objective To observe the effect of modulated frequency sinusoidal electrotherapy on experimental renal failure in rabbits.
目的探讨正弦调制电流对实验性肾功衰竭的治疗作用。
Conclusion It is indicated that the modulated medium frequency sinusoidal electrotherapy has treatment and prevention for the renal failure.
结论正弦调制中频电流对实验性肾衰有治疗和预防作用。
This paper presents a pulse density modulated (PDM) series resonant inverter developed for plastic film surface treater. The use of the PDM inverter enables the constant frequency and voltage.
该文介绍了一种采用脉冲密度调制(PDM)控制策略的串联谐振型塑料薄膜表面处理电源的研制。
The utility model relates to a radio transmitter for low-resistance sound signal, which is used to convert audio signals into frequency modulated signals.
本实用新型是一种将音频信号转换成调频信号的发射装置。
Objective : This experiment is to discover the effective mechanism of modulated medium - frequency impulsed electrotherapy on peripheral nerve diseases .
揭示临床应用调制中频脉冲电治疗周围神经疾病的作用机制。
This paper reports that the frequency responses of a direct-modulated DFB laser diode can be improved using an injection locking method.
验证了通过注入锁模方法，分布反馈(DFB)半导体激光器的频率响应可以得到明显的改善。
In this paper, direct platemaking technology is briefed, frequency modulated half tone dot technology (principles, characters and technologics) is emphasized.
本文简述了直接制版技术，着重叙述了调频网点技术，包括原理、特点及技术。
A method of designing linear frequency modulated (LFM) signals with wide bandwidth and an experimental system that can generate many complex waveforms are presented.
文中不仅给出了宽带线性调频(LFM)信号的具体设计方法，而且给出了可产生多种复杂波形的实验信号产生系统及其主要技术指标。
Modulated stepped frequency radar is a system to get high resolution range profile with the problem of redundancy.
调频步进雷达是一种距离高分辨率的雷达体制，但是会产生目标冗余的问题。
ConclusionThe modulated medium frequency low frequency current hydroelectric bath therapy is a simple, safe and better effect method for sequela of ankle fracture.
结论低频调制的中频电水浴疗法是治疗踝部骨折后遗症的一种简单、安全、疗效好的方法。
应用推荐