signal center

In lidar system basing on the brim detecting technology, it is crucial to determine the absorption spectral profiles of molecule absorption cell filter and the center frequency of emission laser signal in design of lidar system.

基于边缘探测技术的激光雷达系统中，确定分子吸收池滤波器的吸收光谱谱线，以及确定发射激光信号的中心频率，是实现激光雷达系统设计的核心问题。

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At last, the test results of time synchronization between the signal of master station of the "Donghai" Chain of "Changhe 2" navigation system and UTC ( NTSC), kept by the National Time Service Center are presented.

最后，给出了长河二号东海台链的主台信号与国家授时中心的UTC（NTSC）之间的同步实验结果。

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Then, according to the mathmatical description to UWB impulse response in literatures, three kinds of UWB signal modeling are studied, such as LFM 、 impulse 、 carrier-free coded waveforms, supposing the target scattering center distribution is given.

根据文献对UWB雷达目标冲击响应的数学近似描述，在目标散射中心分布设定的条件下，研究了线性调频、相位编码和冲击脉冲三类常用超宽带雷达信号的目标回波建模。

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The local sub system, which locates in the dredger, can monitor and diagnose the main mechanical and electrical devices using thermal parameters, vibration signal, oil analysis and instantaneous speed, and can accept commands from management center.

其中船载子系统安装在船上，采用热力参数法、振动法、油液分析法和瞬时转速法监测机舱和泵舱的主要机械设备和接收机务中心的操作指令。

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Besides the F center signals, a Raman signal with the peak position at 147cm~ (-1) is observed first time, it is assigned to be inelastic scattering of V_ K center.

除F心信号外，首次观察到一个喇曼频移为147cm~（-1）的信号.这一信号被指认为V k心的非弹性散射。

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This paper however developed and built a MZ modulator bias control system with the center of the digital signal processor ( DSP) which is used widely in recent years.

目前偏置电压控制系统大多基于模拟信号进行，而本文以近年来被广泛使用的数字信号处理器（DSP）为中心搭建了MZ电光调制器直流偏置电压控制系统。

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Signal analysis, including spectral analysis, specific energy computation, ringing count rate computation, event count rate computation, signal center frequency computation, autocorrelation analysis, and frequency spectrum energy instability computation.

信号分析。包括：频谱分析、能量率计算、振铃计数率计算、事件计数率计算、信号中心频率计算、自相关分析、频谱能量不稳定度计算。

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With the rapid development of wireless communications, the center frequency of data communications has raised to GHz or above. The RF filter, as an important component of signal processing in the communication systems, attracts more and more attention.

随着无线通信的迅速发展，数据通信的中心频率提升到GHz以上，而射频滤波器，作为通信系统中信号处理的一个重要部件，越来越引起人们的关注。

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According to this designed scheme, hardware circuit of signal interface emluator is designed, which uses a SCM as the control center.

根据此方案设计开发了以单片机为控制核心，并扩展各种外围接口电路的接口信号仿真器硬件电路，并利用C51语言为单片机编制了控制软件。

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It is proved by the analysis of the simulated signals and different signal to noise ratio experimental data that this method can effectively determine the filter center frequency and bandwidth, thereby improving the signal to noise ratio and the diagnosis of bearing faults.

通过对仿真信号和不同信噪比实验数据的分析，证明此方法能够有效确定滤波中心频率和带宽，从而提高信号的信噪比，实现对轴承故障的诊断。

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The telemedicine center monitoring software has the 5 main function modules: signal receiver module, real-time display module, alarm of monitoring signal module, medical database module, the center signal processor control module.

远程医疗中心监控软件的具体功能包括生理信号的接收模块、实时显示模块、信号监控报警模块、医学数据库操作模块、中心信号处理器控制模块。

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