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signals detection
相关语句
  信号检测
     Channel Estimation Based Signals Detection for Nonlinear Coding System
     基于信道估计的非线性编码系统的信号检测算法
短句来源
     The Mechanical Structure and Signals Detection Of RaW Materials Composing Sytem Controlled by WKL I Microcomputer
     WKL-Ⅰ型微机控制配料系统的机械结构与信号检测
短句来源
     Through compared with vibration signals detection method, it is argued that the acoustic emission technology is more sensitive than vibration signals detect ion method in rub fault detection.
     通过与传统的振动信号检测方法相比较,说明声发射技术对碰摩故障检测更为敏感。
     Transient Signals Detection Using an Improved Power-Law Detector
     一种改进的Power-Law检测器在突发信号检测中的应用
短句来源
     AN APPROACH OF SIGNALS DETECTION BASED ON GS ORTHOGRAPHY ALGORITHM
     基于GS正交算法的信号检测方法
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  “signals detection”译为未确定词的双语例句
     Non-Gaussian underwater transient signals detection using power-law detector
     非高斯水声瞬态信号Power-Law检测
短句来源
     Linear Chirp Signals Detection by Wavelet-Radon Transform
     基于小波Radon变换检测线性调频信号
短句来源
     Research on DSP Interstellar Link Signals Detection and Identification
     DSP空间链路信号的检测和识别研究
短句来源
     This paper introduces the method of doppler radar echo signals detection using Radon-STFT.
     我们采用Radon—STFT方法对雷达回波信号进行检测。
短句来源
     This method is imp otant for intermittent signals detection.
     实验表明该方法对周期性脉冲信号的检测是一种行之有效的方法。
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  相似匹配句对
     Detection of Weak Signals
     微弱信号的检测技术
短句来源
     Detection of Transient Signals
     瞬态信号检测
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  signals detection
From the time-dependent absorption signals detection limits of 100 ng/L are achieved at this state of research.
      


The theoretical problems of a compressed-time correlator are investigated from the viewpoint of signal detection. Through discussion of the LMF arid PR signals, some useful conclusions and basic formulas concerning the output signal, spectrum structure, Doppler filter set-up, noise background, SNE gain and signal envelope smoothing are obtained. As a consequence, it has been possible to design an improved sound pulse-compression receiver.

本文从声信号检测的观点出发分析了时间压缩相关器的有关理论问题。结合处理常用的线性调频脉冲信号及拟随机信号的情况,在相关器的输出信号及其频谱结构、多普勒滤波器组的设置、噪声背景及信噪比增益、信号包络的平滑化等方面得到了一些有用的结论和基本计算公式。改进和部分修正了已有的设计理论,为合理地设计近代声信号脉冲压缩接收机提供了依据。

The Laser Doppler Velocimeter (LDV) system determines the flow velocity by measuring the Doppler frequency shift in light scattered from contaminants in a fluid illuminated by a monochromatic laser feam. The main advantage of the technique over hot-wire anemometers, etc, are its ability to measure the velocity at highly localized points in the flow stream and to do so without disturbing the flow, this Report to review this type of measurement with emphasis on the basic theroy, the optical system and its theory...

The Laser Doppler Velocimeter (LDV) system determines the flow velocity by measuring the Doppler frequency shift in light scattered from contaminants in a fluid illuminated by a monochromatic laser feam. The main advantage of the technique over hot-wire anemometers, etc, are its ability to measure the velocity at highly localized points in the flow stream and to do so without disturbing the flow, this Report to review this type of measurement with emphasis on the basic theroy, the optical system and its theory model, signal detection system, an analysis of the effect of system parameters on signal strengh, spatical resolution and measurement accuracy, etc, and about the advantages and limitations of the optical methol, and the present usefulness of the techniqne and possible further developments.

激光多普勒测速系统是用一束单色激光照射到流体中的杂质质点上,测出其散射光的多普勒频移,然后换算成流体的速度。比之热线风速计等这项技术的主要优点是能测出流体中很小范围内的局部速度,而又不扰动原来的流动。本文着重评论了这种光学方法的基本原理、光学系统、它的理论模型、和讯号检测系统;分析了系统参数对信号强度、空间分辨率和测量精度的影响;还指出了此光学方法目前的应用和将未的发展方向。

In this paper the performance of a type of frequency analyzer under white Gaussian noise distributions is discussed. The frequency analyzer is an essential part of the acquisition receiver in precisiontracking systems. The analyzer we developed is of the type of multiple current switched logic circuit with weighted resistance network. The points, which are investigated with emphasis, are as follows. (1)The selection of the optimal threshold of signal detection. (2) The false alarm and miss probabilities...

In this paper the performance of a type of frequency analyzer under white Gaussian noise distributions is discussed. The frequency analyzer is an essential part of the acquisition receiver in precisiontracking systems. The analyzer we developed is of the type of multiple current switched logic circuit with weighted resistance network. The points, which are investigated with emphasis, are as follows. (1)The selection of the optimal threshold of signal detection. (2) The false alarm and miss probabilities in multiple channels with unequal bandwidth. (3) The influence of noise on the analyzer output. (4) The performance of the analyzer under more generalized condition, that is, when the input is a set of spectrum lines.It is shown that our analyzer has the ability to guide the receiver to lock on the carrier even when the carrier amplitude is smaller than that of the subsidiary lines of subcarriers.

本文分析一种频率分析器在噪声作用下的性能。频率分析器是精密跟踪系统中截获接收机的核心部分。该分析器因采用权电阻网络和多路电流开关逻辑电路而使其具有某些特殊功能。文中讨论了;信号检测的最佳门限选择;在不等带宽的多路系统中虚警和漏报概率;噪声对频率分析器输出的影响;输入为一组谱线时分析器的性能。分析表明,甚至在载波谱线低于副载波谱线时,该分析器也能把精密跟踪接收机引导到载波上而不致错锁。

 
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