按频率的高低来划分时,中频(MF,Medium Frequency)是指,频段由300KHz 到3000KHz的频率,多数作AM电台。按其在电路中的位置与作用来划分时:IF中频(Intermediate Frequency)是指高频信号经过变频而获得的一种信号。
中频逆变式脉冲引弧器的研究-中国数控机床网-中国最大的机床门户网站 关键词: 中频;逆变;引弧;倍压整流 [gap=523]Key words :medium frequency;inverter;starting arc;double voltage rectification
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... 泰博文档网 关键词:中频,数字移相器,Ku波段,加载线,开关线,3dB支线耦合器 [gap=2381]Key Words: Intermediate Frequency (IF), digital phase shifter, Ku-band, loaded-line, switched-line, 3dB branch-line co...
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...要求输入数据为正常语音速率,具有严格的时序约束,要求能在连续的输入数据采样间完成计算。采用DSP处理器之后,在整个计算中可以执行数万条指令。但是,无线通信中,一个DSP处理器无法实时实现中频(IF)和基带调制解调器中的高速算法。利用某些DSP处理器的多个处理单元可以克服指令带宽限制。
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... IOCS Inverse Discrete Cosine Transform离散余弦逆变换 IOD Intermediate Frequency中频 IP Interface Module接口模块 ...
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中频带 mid-frequency band ; midband ; low band ; mid-frequency bor
零中频 Zero-IF ; ZIF ; [电子] zero intermediate frequency ; ZERO INTERMEDIATE
中频放大器 [电子] intermediate frequency amplifier ; [电子] IF amplifier ; IF AMP ; intermediate amplifier
伴音中频 sif ; sound intermediate frequency
中频频率 IF-FRE ; Intermediate Frequency ; FRE
中频锁相环 IR-PLL ; PLL
中频设定 VIF SYS
中频变压器 intermediate frequency transformer ; medium frequency transformer ; IF transformer ; IFT
中频段 MFMid Frequency ; MF ; middle-frequency band
The digital IF signal is converted to zero IF by digital down converter, then taken FFT spectrum analysis with Hann window in advance.
数字中频信号首先通过数字混频下变频至零中频,然后作加海窗的复FFT谱分析。
参考来源 - VXI总线宽带数字化监测接收机方案研究To overcome this problem, we think to digitized the signal at medium frequency, even RF, and then demodulate it in digital domain.
为克服这一问题,人们考虑在中频,甚至射频就对信号数字化,再在数字域内进行解调。
参考来源 - 高速数据采集系统的研制According to the block classification, it embedded the watermark into the larger coefficients of the mid-frequency of selected blocks.
水印为二值图像,根据块分类以不同的嵌入强度嵌入到所选择块的中频系数中。
参考来源 - 一种基于DCT的模糊聚类自适应水印算法It should be pointed that the sp~3 content in the DLC films prepared by middle frequency reactive magnetron sputtering technology is not high, hence, their resistance against sand blowing is not enough even though their resistance to corrosion seems good.
中频非平衡磁控反应溅射制备的含氢的类金刚石薄膜的sp~3含量不够高,不能很好的抗击砂尘冲刷;耐腐蚀性测试性能良好。
参考来源 - 中频非平衡磁控溅射制备DLC膜的工艺研究·2,447,543篇论文数据,部分数据来源于NoteExpress
他在过去的几年中频频来这里治疗小儿麻痹。
He had been there frequently in past years for treatment for infantile paralysis.
性话题往往在电视和其他媒体中频频被提到。
It's a topic that comes up on television and in other media.
浏览求职板块,对简历中频繁出现的库有一个大概了解。
Check out the job boards to get a sense of which libraries are showing up frequently on resumes.
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