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- A novel DGS lowpass filter is used to purify IF signal. 中频引出通过新颖的DGS低通滤波器滤波后输出。
- The receiver quantitates IF signal by using band-pass sampling. 该接收机利用带通采样对输入的中频信号进行数字化处理。
- IF signal not pre-distorted, the variable capacity CV1 enables to correct the inclination of the transmitted pass band. 以未预失真条件信号、这个同样的标准，可变电容CV1赋予权利去校正已传输通道波段的倾斜度。
- The Up converter receives at its input the IF signal coming from the modulator and converts it on the RF transmission channel. 上转换器在它的来自调节器的输入IF信号上接收和在射频传输频道上转换。
- Extracting the in pulse characters based on direct sampling from IF signal and quadrature coherent detection is proposed. 讨论了利用中频直接采样相干检波技术实现信号脉内特征的提取,仿真结果证明了该技术的可行性。
- It serves as the signal generator in a transmitter and in a receiver, and the local oscillator is used together with a mixer to convert the received RF signal to an IF signal. 它在传输器跟接收器中是作为标准的讯号产生器，本地震荡器通常是跟混波器一起使用将射频讯号转换到中频。
- Be prepared to stop if signalled to do so and give way to emergency vehicles. 随时准备指示停车,并让路给紧急服务车辆。
- This paper introduces the basic principle of the digital beamforming technique and it's key techniques. Then the digital IF signal, digital quadroture demodulator, the beamformer and the beam controller is primarily discussed. 介绍数字波束形成技术的基本原理、关键技术。着重讨论中频数字化及正交解调器、波束运算器和波束控制器。
- This method directly makes quadrature demodulation of the IF signal by utilizing the second-order sampling and sign-alternating,and then calculates the correlation value between the receiver signal and the local spreading code in analog domain. 该捕获方法采用二阶采样和符号交替实现中频信号的正交分解;再利用模拟匹配滤波器在模拟域计算接收信号与本地扩频码的相关值.
- DSP accomplishes the baseband signal processing, the DDC and the DUC deal with the transformation between baseband signal and IF signal, multi-sample rate signal processing, signal modulation and demodulation. 系统中DSP主要完成基带信号的处理，上下变频器完成基带和中频信号之间的转换、系统的多抽样率信号处理和信号的调制解调。
- Having studied the digital down-conversion(DDC)process of IF signal before the base band process which follows A/D conversion in wireless communication,the paper puts forward a new idea of utilizing the FPGA to realize multi-channel digital signal DDC. 研究了无线通信接收机中,经A/D转换后到基带处理前的中频信号的下变频处理。 提出了用FPGA实现多通道数字信号下变频的新设想。
- You can do it this way if you care to. 如果你乐意的话，可以这样做。
- A simple test will show if this is real gold. 简单的试验就能证明这是否是真金。
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久，就会发酵。
- If I had my way, I'd go to the movies tonight. 假如我做得到的话，我今晚会去看电影。
- If we all muck in we'll soon finish the job. 如果我们大家都动手，一会儿就可以干完这件事。
- If you go to a private hospital you must pay. 如果你去一家私立医院就诊，你得付费。
- We should practice economy even if we are rich. 即使我们富裕了也仍应该厉行节约。
- Do you mind if I draw up the blinds? 我卷起窗帘你不反对吧？
- To satisfy the requirement of high performance signal processing technique,it is demanded to use the direct sampling of IF signal to get quadrature signals. 为满足高性能信号处理技术要求，需要直接对中频信号进行采样来得到正交双路信号。
