数字信号

The method for determining a phase-noise spectrum comprises generating real complex samples, by digitally sampling a phase component and phase quadrature component of the input signal in baseband, determining ideal complex samples from generated real samples, establishing complex quotients from the real and ideal complex samples, generating modified complex quotients by assigning the value 1 to the complex quotients, and subjecting the modified complex quotients to a Fourier transform.

所述方法包括以下步骤：通过对基带中的所述输入信号的相位分量和相位正交分量进行数字采样，产生实际复数采样Areal(n(S100)；根据产生的实际采样Areal(n确定理想复数采样Aideal(n(S101)；根据实际复数采样Areal(n和理想复数采样Aideal(n形成复数商ΔA1(n＝Areal/Aideal；通过对所述复数商指定值1，产生经修正复数商B(n(S106)；以及对经修正复数商B(n进行傅立叶变换(S107)。

The technology of direct digital synthesis plays an important role in modern radar wave form generation.

直接数字频率合成技术DDS，在现代雷达信号波形产生中具有重要的地位。

Using LM135 semiconductor temperature sensor, CPU and digital tube interface, a digital display free-air thermometer for helicopters has been developed sucessfully, which will take the place of the bimetal pointer thermometer.

采用LM135型半导体温度传感器，与CPU、数码管接口，经A/D和V/F转换等信号处理，成功研制了某直升飞机数字大气温度显示器，取代了双金属片指针式温度计。

Using LM135 semiconductor temperature sensor, CPU and digital tube interface, a digital display free-air thermometer for helicopters has been developed sucessfully, which will take the place of the bimetal pointer thermometer.

半导体温度传感器具有较高的精度和良好的线性输出。采用LM135型半导体温度传感器，与CPU、数码管接口，经A/D和V/F转换等信号处理，成功研制了某直升飞机数字大气温度显示器，取代了双金属片指针式温度计。

In this paper,the software design and the implementation scheme of the video stream capture and real-time displaying system of CMOS digital image sensor based on USB2.0 interface and DirectShow technology was put forward,and the architecture of DirectShow software was also given.

徐大诚，教授，主研领域：信息获取与处理技术，光电信号处理技术给出了一个基于USB2.0和DirectShow技术的CMOS数字图像传感器视频流捕捉及显示系统的软件设计与实现方案，阐述了DirectShow的技术结构。

Based on these design guides, the analysis and design of a low phase noise and low power dissipation, with 0. 18μm CMOS process, integrated Colpitts crystal oscillator with automatic gain controlled feedback loop as the amplitude-limiting technique, low dropout voltage regulation with band gap reference voltage and frequency tuning monotonicity guaranteed by digitally controlled variable capacitor array is performed to revise influence caused by process, voltage and temperature conditions for. handset. The oscillation with very stable amplitude value and frequency value is achieved.

它利用对工作温度、电源电压和制造工艺不敏感的带隙基准源和在集成电路中元件特性之间匹配好的优点产生了一个不随温度、电源和工艺改变而且可以跟踪工艺变化的参考基准电压，同时通过自动频率控制环路利用数字电路控制可变电容阵列控制瞬态频率稳定度，校正温度、电源和工艺改变对频率的影响，从而可以在很宽的电源电压范围(2.7v—3.7v)和温度范围(-40℃—125℃)以及CMOS工艺参数变化(TT、FF、SS、SF、FS)的条件下提供幅度稳定、频率稳定的振荡输出信号。

This peper introduces the self-checking short shunt circuit is the current railway system to assuce safe running' Take the Polar frequency autornatic blocking system for example, the feasibility and reliability of this method are analyzed by Numerical simulation.

以铁路信号制式中的极频自动闭塞系统为例，利用数字仿真方法分析这种措施的可行性及可靠性。

SAS Morpheus chokes to ask for the abbreviate of Sleep Apnea Syndrome integratedly. Potential of Satellite Potential satellite namely junior class status, and in order to use late part had better. Saw-tooth Wave toothed wave, dentate wave and dentate report activity are synonymous. Frequency of Samplins Frequency sampling is in the instrument of digitlization report physiology that uses now, the imitate signal that notes draw makes need to undertake sampling when digital changeover.

SAS睡眠窒息综合征sleep apnea syndrome的缩写。satellite potential卫星电位即晚成分，且以用晚成分为好。saw-tooth wave锯齿波，锯齿状波和锯齿状电活动同义。samplins frequency采样频率在现在使用的数字化电生理仪器中，把描记到的模拟信号进行数字转换时需进行采样。

Considering properties of accelerometers and the real-time requirements of control system, this paper proposes a high-brand and digital moving average filter.

结合加速度信号的特点和控制器实时性的要求，提出了数字高通和移动平滑滤波算法。

All above have been proved by digital audio, 80C51 and the perpetual calendar designs separately.

同时，可以根据客户的要求增加库的单元或者改变单元的形状，使设计者在一些独特的，具有苛刻要求的模拟，数字和混合信号IC设计中能得到显著的提高。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了