| 1. | Transmiting beamforming of stepped frequency signals for the uniform circular array
基于均匀圆阵的步进频率信号发射波束形成 |
| 2. | 1 . stepped - frequency signals are used in echo simulation . it could generate synthetic high resolution image
1 、用步进频率信号完成回波模拟,研究了这种信号的特点。 |
| 3. | These requirements are too hard to reached by using normal analog circuit . frequency synthesizer is the key technology to produce a great deal of frequency signal
这些技术要求用普通的模拟电路技术是达不到的，频率合成技术是产生大量高精度频率信号的主要技术。 |
| 4. | Often , this is used to make appliances appear to " talk " or wall outlets appear to be " sending radio frequency signals " , or strong radio interference will be found to emanate from a point in mid air
这常常使设备好像是在“谈话” ，或墙缝处好像在“传送无线电频率信号” ，或强大的无线电干扰会被发现仿佛是来自于空中任何一处。 |
| 5. | The experiment result indicates that the circuit system has achieved the expected design goals . furthermore the circuit system is valuable for designing the data acquisition and control system for any frequency modulation sensor
经实验验证，所设计的电路系统不仅能达到预期的设计目标，此外其设计思想对任何只要输出是频率信号的传感器的使用都具有积极的参考价值。 |
| 6. | At89c52 receives the frequency signal from the syntony circurt and processes it , then according to design request , sends out all kinds of controlling signal . in allusion to this signal processing circurt , we have designed corresponding software for at89c52
At89c52接收来自谐振电路的频率信号，并对其进行处理，再按照设计要求发出各种控制信号。针对此信号处理电路，为at89c52设计了相应的软件。 |
| 7. | It is very difficult to design a high - quality underwater acoustic data transmission system . in our study , we use frequency diversity and frequency - hopped technology . this method is an effective solution for the isi and signal fading
该方法起到保证mfsk传输系统使用频率中文摘要统使雨频率分集技术能得以有效的实现；并可用于提高mfsk信号检测精度，因此在频率信号检测中它有广泛应用意义，它是本文重要创新之处。 |
| 8. | In this method , the phase difference between two compared signals that have same nominal frequency can be converted into voltage signal by phase detector . the voltage signal varies linearly with the phase difference and can be displayed or recorded by some instruments
此方法是将两个被比对的标称值相同的标准频率信号之间的相位关系，通过线性鉴相器转换成与它成线性关系的电压信号，并通过相应的设备进行显示纪录。 |
| 9. | This paper presents a method of improving on frame & horizontal synchronization in laser phototypesetter , by using singal - chip computer system to detect real - time frequency deviation and adjust film transmission speed
摘要提出了一种在激光照排机电控系统中，利用单晶片微机对转镜扫描光栅频率信号的暂态波动量进行检测、提取，并以此实时校正系统输片速度，实现场扫描对行扫描的跟踪、补偿，从而提高行、场扫描同步精度的方案。 |
| 10. | The displayer based on pic16f877 mcu , expanded the can communication circuit , the keyboard and the led . in the part of the software design , the intensity signal processing algorithm , the frequency signal processing algorithm and the keyboard program are conducted
在二次仪表硬件电路设计中,详细介绍了输入电流电压转换电路、强度信号处理电路、频率信号处理电路以及电源电路,数字电路部分以pic16f877为核心,扩展了can通讯接口,键盘及显示部分。 |
