本文是研制超声相控阵换能器动态聚焦系统，它包括数字式多通道信号发射系统和两种超声相控阵换能器。
This paper focuses on developing a digital ultrasonic phased array transducer system which can realize the focusing and scanning of sound beams.
本发明公开了一种信号发射系统、方法及装置，涉及通信及广播电视领域。用以降低信号发射系统的硬件成本。
Being related to communication and broadcast television area, the invention is in use for reducing cost of hardware in signal transmission system.
系统能够拦截并自动处理雷达信号，管理发射机有效干扰大数量的不同的雷达威胁。
The system intercepts and automatically processes radar signals and manages the transmitters to effectively jam large Numbers of diverse radar threats.
这种服务采用了高级电视系统委员会(atsc)的广播系统直接向手机发射信号。
Instead, the service USES an ATSC broadcasting system to beam signals directly from the station to the mobile devices themselves.
这个系统使用起来十分简单：把一个能够发射无线电的信号灯放在家里，把信息发射器绕在你的脚踝上。
The system works simply: you keep a radio beacon in your home and a transmitter around your ankle.
系统能发现、截取、分析、识别并且记录敌人雷达信号发射，去获得它的操作模式和技术参数。
The system can detect, intercept, analyse, identify and record the signal emissions of enemy radar to acquire its operation modes and technical parameters.
利用一个自适应控制器跟踪信息信号的误差对产生混沌载波的发射系统进行参数调制。
The parameter of the transmitting system procreated chaotic carrier is modulated by errors from an adaptive controller and information signal.
在现代无线通信系统中，对发射信号进行直接射频调制已成为射频无线电的发展趋势。
In modern wireless communication system, the direct RF-modulation for transmitting signal is a new developing trend of RF radio.
文中对发射回路信号及检测原理进行了分析，对测试系统的软硬件进行了设计。
In this paper, the signal of launching circuit and the testing theory are analyzed, and both software and hardware of the testing system are designed.
雷达发射波形不仅决定了信号处理的方法，而且直接影响系统的分辨力、测量精度、以及抑制杂波能力等潜在性能。
The radar emitted waveforms not only decide the methods of signal processing, but also directly affect the system resolution, the measurement precision and the ability of clutter rejection.
预编码是一种根据信道情况对发射信号进行预处理，从而提高MIMO系统性能的技术。
Precoding technology can improve the performance of MIMO system, by adjusting the transmit single according to the channel condition.
该系统主要采用小灵通基带芯片ML7338（ARM7TDMI核）和RDA5206射频模块，实现对射频信号的解调，同时对基带信号重新编码再调制发射，很好地解决了普通直放站射频干扰问题。
The ML7338(ARM7TDMI core) and RF module RDA5206 are used to demodulate RF signals, recode, remodulate and transmit baseband signals, thus solving the RF interference problem in traditional stations.
移动通信系统中的信号传输方法，发射机，接收机和扩展码同步法。
Signal transmission method, transmitter, receiver and expanding code synchronous method in mobile communication system.
利用混沌信号作为载体实现信息通讯，其关键问题是发射机系统与接收机系统的混沌同步。
How to synchronize the chaos signals between chaos systems of transmitter and receiver is the key problem of applications of chaos in communication.
自适应对消器可以有效地消除雷达发射机宽带泄漏信号对雷达系统本身的影响。
Adaptive canceller is used to reduce efficiently effects of a broadband leakage signal in radar transmitter on the radar system.
设计了1种在单片机AT89C51控制下运行的、利用电力线载波发射控制信号的节电控制系统。
This paper presents an electricity-saving system controlled by Single chip Microcontroller AT89C51 and power line signal carrier.
移动通信系统中的信号传输方法，发射机，接收机和扩展码同步法。
Signal transmitting method, transmitter, receiver and spread-code synchronizing method for mobile communication system.
系统中发射器采用编码器编码后发送超高频信号，接收器采用二次混频型超外差式接收移动目标信号。
The system uses the emitter to send ultra high frequency signals after coding with signal coder and the secondary superheterodyne mixing receiver to accept the moving target signals.
雷达发射波形不仅决定了信号处理方法，而且直接影响系统的分辨力、测量精度以及抑制杂波能力等性能，因而它的设计和选择至关重要。
The radar waveform not only direct the signal processing, also affect the system resolution, measure precision, power of suppress clutter and so on. So its design and selection is very important.
光发射机的功能是将电脉冲信号转换成光脉冲信号，并以数字光纤通信系统传输性能所要求的光脉冲信号波形从光源器件的尾纤发射出去。
Transmitter is the device which changes electrical pulse signal into optical pulse signal, and then transmit the optical signal in wave form by laser diode or light-emitting diode.
系统发射的探测光束发散角较大时，信噪比较差，且光束扫过点目标可能出现条纹状信号过程。
For large probe beam divergence the SNR is relatively poor, and even a streaky signal process is predicted if a point target is scanned across.
激光引信光学组件作为导弹系统中的重要组成部分，担负着探测信号的发射与接收，其工作性能影响到整个武器系统的质量。
As a key component of a missile, the optical module in the laser fuze transmits and receives detecting signal, its performance affects the whole weapon system.
系统采用移频键控（FSK）调制方式，对轴温数字信号进行处理并发射，上传给便携式模拟接车系统。
The system adopts FSK modulation way to carry out directly digital signal of axle tempratureand transmit to the receiving system of test train.
因此，调频广播信号作为一种类随机发射信号，具较好脉冲压缩性能、接收机系统误差小而且容易获得的优点。
So the FM signals as an opportunity signals have the advantages of good performance of impulse compress, low system error of receiver and easy access.
根据管道泄漏时产生声发射信号的现象，构建了一种管道泄漏与泄漏点定位的检测系统。
According to the phenomenon of sonic transmission caused by pipeline leakage a detecting system of pipeline leakage and the location of the leakage point is structured.
建立了工程陶瓷高速深磨中声发射的实验系统，自主开发了其中的声发射信号虚拟仪器采集系统。
An acoustic emission (AE) test rig with signal acquisition virtual instrument system has been developed for engineering ceramics high speed deep grinding.
同时，将信息信号直接叠加在发射的混沌信号中驱动接收系统。
At the same time, the information is directly added to the chaotic signal in transmission to drive the receiving system.
典型的超宽带雷达系统发射的是冲激脉冲信号，具有很大的带宽，但限制了系统的作用距离。
A typical Ultra Wideband Radar system emits impulse signal, which has wide band, but limited operating range.
采用机床主电动机功率法和声发射（AE）法来获取切削过程中发出的刀具磨损和破损信号，建立了刀具状态试验系统。
Experiments were implemented to obtain the motor power and AE signals under different cutting parameter condition(cutting velocity, feed velocity and cutting depth), tool wear and breakage conditions.
采用机床主电动机功率法和声发射（AE）法来获取切削过程中发出的刀具磨损和破损信号，建立了刀具状态试验系统。
Experiments were implemented to obtain the motor power and AE signals under different cutting parameter condition(cutting velocity, feed velocity and cutting depth), tool wear and breakage conditions.
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