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image frequency signal 镜频信号
I/Q imbalance problem causes finite rejection in the image frequency band, and the image interference will alias into the desired signal, severe distortion will occur. I/Q不平衡问题将会造成接收机的镜像干扰排斥能力大幅降低，镜像干扰将使得欲接收的信号严重失真。
The readout principle and test method of high frequency signal of CD are introduced. 介绍了CD光盘的高频(HF)信号的读取原理和测试方法。
The match strobe gate is presented to improve the measurement precision of low frequency signal. 文中提出使用匹配选通门提高低频信号频率测量精度。
The output of common ultralow frequency signal generator has only a few fixed waveforms which can not be changed. 常用超低频信号发生器的输出只有几种固定的波形,不能更改。
High quality REC of video frequency signal and big area communion of video frequency resources are the important parts of Instruction Multimedia Resources. 其中,视频信号的高质量录制、视频资源的大范围共享,是多媒体教学资源建设的重要组成部分,成为教育界所关注的重点。
The DFT phase detection method can take out frequency, phase and magnitude of the base frequency signal from a random synchronization signal. 离散傅里叶变换可以从任意信号中抽取基准频率倍频次信号的相位、频率和幅值,可以解决谐波对外同步信号的影响,从而实现周期控制锁相环对谐波的识别。
It is during these hours when the transmitter was implanted, and when, I awoke I had a searing high frequency signal at about 100 db in my skull. 在这几小时的时间里，芯片在那时被植入，并且在那我醒过来的时候，在我的头骨里，有一种大约在100分贝的灼热的高频信号。
Through testing, its noise figure is 5.5dB, mixing gain is 5dB, its image frequency rejection adds up to 19dB, which all meet the requirements for the system (NF=7.5dB, Gain=3dB) . 经测试，该接收机前端的噪声系数为5.;5dB，变频增益为5dB，镜频抑制度为19dBc，均超过了系统要求的指标(噪声系数7
Operating in the heavy congested SW band, HF radars use a quasi-random step frequency signal to avoid the interference bands. 高频雷达工作在电磁环境十分恶劣的短波段,为避开干扰严重的频段,采用一种准随机跳频信号。
Can be output voltage, current, millivolt, frequency signal output of 24V DC power distribution circuit to provide power for the transmitter. 可输出电压、电流、毫伏、频率等信号24V DC配电输出为变送器提供回路电源。
The high frequency signal can be decomposed, and the frequency field can be divided into tinier ones with the emerging of wavelet packets. 摘要小波包的方法能对高频信号进行小波分解，给出了频域带更精细的划分。
Can control audio frequency signals remotely，the volume can be modulated. 可对各路音频信号进行远程操控，音量可调；
In the data process the measured complex time signal is converted into frequency signal by DFT to get vibration information regarding frequency and amplitude of the rotor. 在数据处理中,对所得到的复杂时域振动信号进行了离散傅里叶变换(DFT),从而在频率域获得了转子的振动频率和振幅信息。
It is an important application of superconducting devices to achieve the spectral information of high frequency signal by using the Josephson junctions. 摘要利用约瑟夫森效应获取电磁信号的频谱信息是超导电子学的重要应用之一。
The study also includes a series of high frequency signal compensation, highfidelity processing method, practice proves the fidelity, resolution andsignal-to-noise improve much. 在本次处理方法研究中还采用了一系列的高频信息补偿、振幅的高保真处理措施,处理结果的保真度、分辨率和信噪比较以前的资料有很大提高。
image frequency monitored control 视频监控
IP data transmission, the high definition figure video frequency signal are transmitted in real time and some other multimedia information could be transferred at the same time. 利用卫星IP数据传输可以在实时传输高清晰度数字视频信号的同时传输远程教学所需的其他多媒体信息。
The heroine is the spitting image of the author. 书中女主人翁是作者的真实写照。
Owing to the phenomenon of "target splitting" of multi-scatter motion target range profile of the stepped frequency signal, it brings difficulties in target identification. 频率步进信号对运动的多散射体目标成像时会出现“目标分裂”现象,给目标识别带来困难。