if signal造句

• Prepare to stop if signalled to do so
  准备在看到停车信号时停车
• 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。
• Realization of quadrature coherent detection by direct sampling of if signal
  直接中频采样实现正交相干检波的研究
• 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。
• Radar if signal sampling and engineering implementation of digital coherent detection
  雷达中频信号采样及数字相干检波的工程实现
• Stop if signalled to do so by a police officer or if indicated by a traffic sign
  遵从警方的标志按照警务人员或交通标志的指示停车
• Ionospheric effects ca n ' t be ignored if signals are at a low band and the bandwidth is large
  结果表明，在信号频段较低、带宽较大的情况下，电离层的影响不容忽视，必须加以校正。
• Extraction of the in - pulse characteristics of signal based on direct sampling from if signal and quadrature coherent detection
  基于中频直接采样正交相干检波技术的信号脉内特征提取
• 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。
• 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 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。
• This approach realizes channel simulation by combining special dsp chips with universal dsp chip , after the sampling of high - speed if signal
  对高速的中频信号采样数字化后,以专用dsp芯片和通用dsp芯片相结合的方法实现信道仿真。
• If signal averaging technology was used in our co2 dial system , then would improved the sensitivity of measurement clearly and could meet the demand of development
  运用信号平均技术之后，本课题研制的系统其测量灵敏度完全可以满足设计要求。
• Lfmcw radar adopts the receiver with the structure of “ homodyne - fourier ” , and acquires the range spectrum after its if signal is sampled , and then processed by ftt
  Lfmcw雷达采用了“差拍-傅立叶”接收机结构,其回波中频信号经数字采集后进行fft处理,从而获得雷达的距离谱。
• A new approach is put forward with regard to the if signal , which applies to physical simulation of baseband and if channel and has a bandwidth within 12 khz
  本文的主要工作包括以下几个方面: 1 .提出了一个hf信道物理仿真器的设计方案。该方案适用于基带和中频信道的物理仿真,带宽12khz 。
• In the design of w band balanced mixer , if signal is extracted via the fifth port made on the conventional ratrace , and it is sent out through a novel lowpass filter using microstrip stepped - impedance hairpin resonators
  在w频段单平衡混频器的研究中,本文在传统混合环的基础上引出第五个端口,它连接低通滤波器将中频输出。
• Temporary informatory sign - be prepared to stop if signalled to do so by a police officer or if indicated by a traffic sign in an emergency , or for other purposes , the police may erect temporary signs and barriers
  临时提示标志应准备按警务人员或交通标志的指示，随时停车。在紧急事件时或其他原因，警方会竖立临时标志及路障。
• But it is not feasible to realize the ideal sdr by directly placing the ad converter close to the antenna . converting the broadband rf signal to the if signal which can be digital is the key to realize the sdr
  由于直接将a / d变换置于天线端的理想软件无线电解决方案目前还不可行,将宽带的射频信号转换为可数字化的中频信号是软件无线电得以实现的关键。
• Due to the limitation of device level , it is impossible to sample rf signal in direct now and have to choose the middle project - sampling if signal , using special chip to built in the flexible multi - mode and multi - function receivers
  鉴于目前器件水平的限制，现阶段尚无法对射频直接采样，只能采用折中方案? ?中频采样，使用专用芯片构成灵活的多功能多制式接收机。
• By the tuner , the dvb - t signal received has been converted to the if signal , and then demodulated by the cofdm demodulation chip . in the end , the usb controller sends the ts ( transport stream ) to the pc where it is decoded by the software
  接收到的dvb - t信号经调谐器进行下变频处理后输出中频信号,再进行cofdm (编码正交频分复用)解调,得到的ts码流信号通过usb控制器送入pc机中进行软件解码播放。