signal noise

This paper introduces a kind of rough property test method of radar receiver with on-line test, which estimates radar property according to the signal noise ratio of fixed object echo signal.

为了对雷达接收机性能进行在线测试，本文提出一种雷达接收机性能粗略测试方法，该方法是根据固定地物回波的信杂比来估测雷达的工作性能。

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In order to simplify the complexity of circuit design and signal noise removal, we use the software method to pretreat and compute pulse oximetry signal and the temperature signal.

为了简化复杂的电路设计和去除信号中噪声干扰，本文采用软件方法实现脉搏血氧信号和温度信号的预处理以及值的计算。

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To separate a weak deterministic signal from a chaotic background of which the dynamic mechanism is unknown is a different problem from the noise reduction for a chaotic signal since the mixed signal is also a chaotic signal with higher dimension than the original chaotic system.

混沌信号与确定性小信号叠加生成的混合信号是一更高维的混沌信号，因而不能用一般的混沌信号噪声抑制的方法进行分离。

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Signal noise ratio weighted stack by dividing frequency band

分频信噪比加权叠加

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In this paper, the theory of wavelet transformation in signal noise reduction is introduced, together with the algorithm of signal decomposition and reconstruction.

介绍采用小波变换进行信号降噪的原理；利用小波分解和重构函数对轧机主传动轴应力和扭矩信号进行降噪处理。

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One of its main techniques is to extract weak target echo signal submerged by strong noise and clutter.

如何从强噪声和杂波中提取微弱的目标回波信号是无源探测系统的一项关键技术。

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The relation of detection probability, false alarm probability and signal noise ratio in IRST are discussed in the paper, and a novel missile warning receiver's ( MWS) example designed by the model is given.

文章讨论了红外搜索跟踪系统中探测概率、虚警概率和信噪比三者之间的关系，给出了一个在此模型基础之上的实际地面告警系统的探测概率计算实例。

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Auger Electron Spectroscopy Obtained from Low Signal Noise Ratio

低信噪比的俄歇电子信号提取

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At the same time it reduces the losing of the details of picture information and raises the signal noise ratio of the algorithm of median filter.

同时减少了图像细节信息的丢失，提高了中值滤波算法的信噪比。

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Related detection must guarantee signal synchronization sampling, and get the biggest signal noise ratio.

相关检测要保证信号同步采样, 可以得到最大信噪比.

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Since it is" in phase stack", the reflecting signals are strengthened, the random noise is rejected and the signal noise ratio is improved effectively.

由于是同相叠加，所以反射信号得到加强，随机噪声受到压制，有效地提高地震资料的信噪比。

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Therefore by earnestly studying in the wavelet analysis method, in view of the airborne target noise signal, the article adopts the wavelet soft threshold value to eliminate noises, obtains the satisfying effect.

因此本文在认真研究了小波分析方法的基础上，针对空中目标噪声信号，采取小波软阈值去噪方法，取得令人满意的效果。

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In addition, the state space model and the structure property of signal space were fully employed in this article, therefore the better performance of the harmonic retrieval was gained under the additive hybrid colored noise background as well as lower signal noise rate.

本文还采用了状态空间模型来描述时间序列，充分利用信号空间的结构特性，进而最终实现了在有色加性混合色噪声背景下较低信噪比的谐波恢复。

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We analyzed the theoretical models for signal photon noise, pixelation noise, and background noise. With simulation and experiments, we evaluated the accuracy and applicability of current models for calculating localization precision.

分析了信号的散粒噪声、像素化噪声和背景噪声的理论模型，并通过仿真和实验，对现有理论模型的准确性和适用范围进行评估。

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The basis of the theory model of laser radar for direct detection is built on that the maximal detectable distance is decided by certain detection probability, false-alarm rate, signal noise ratio and threshold noise ratio.

从虚警概率、探测概率、信噪比和阈值噪声比决定最大探测距离的这一角度阐述建立直接探测激光雷达模型；假设在直接检测方式下，探测器噪声可以用高斯概率密度函数表示；

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Raw thermal images acquired by pulsed thermography ( PT) usually have low signal noise ratio ( SNR) and temperature contrast.

脉冲热像检测中直接获取的原始热像往往信噪比较低、对比度较差。

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A Phase Space Analysis of Signal Noise Received by an Oceanic Lidar System

海洋激光雷达系统接收信号噪声的相空间分析

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Design of Sonar Signal Simulation System Based on Target Noise

基于目标噪声的声纳信号仿真系统设计

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There they were: signal noise, mutations, executive function, self-organization.

看看这些术语: 信号噪声 、 突变 、 执行功能 、 自我 组织.

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Compared of the wavelet threshold, denoising modulus maxima denoising and translation invariant in effecting the denoising. We have found that the wavelet threshold denoising preserved eggs percussion vibration signal noise cancellation. 4.

比较了小波阈值去噪、模极大值去噪和平移不变三种常用的小波去噪方法的去噪效果，发现小波阈值去噪方法对皮蛋敲击振动信号的消噪效果最佳。

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Simulation results show that the average peak signal noise ratio is increased with various video sequences.

实验结果显示,对不同的视频序列,其峰值信噪比均有不同程度的提高.

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These theorems show that when the probability density of the noise in seismic records is unknown, the method of adding a new noise can be used to recover amplitude of seismic signal with sign-bit processing, but the new noise must be in uniform distribution.

这些定理指出，在地震记录的干扰特性不知道时，可采用叠加随机噪声的方法进行符号位地震记录振幅恢复，但是该随机噪声的概率密度必须为均匀分布。

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The Results by using Pick-pick Signal Noise Ratio ( PSNR) or mean square error ( mse) are different from by subjective psychological assessment, while the latter are usually inexactly and have subjectivity.

通常使用的峰-峰信噪比或均方误差与主观感觉并不相符，而主观评价又存在主观性和不确定性，其结果往往因人而异。

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The aim of image restoration is to achieve super resolution and increase signal noise ratio.

图像的超分辨力复原和信噪比的提高是图像复原追求的目标.

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The relation between the wavelet threshold and the signal-to-noise ratio in wavelet image denoise is presented. From many simulations of wavelet image denoise, the unimodal property between the wavelet threshold and the signal to noise ratio ( SNR) under different noise strength was developed.

本文研究了小波图像去噪过程中阈值与信噪比的关系，通过大量的仿真得出了小波图像消噪过程中，在不同的噪声强度下，信噪比与小波阈值之间存在单峰性的特征。

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The laser warning is the important precondition and basic measure in laser countermeasure. The first technical problem for the laser warning is how to recognize a targeting laser signal from complex background noise and accurately raise the alarm.

激光告警是激光对抗的重要前提和基本手段，如何在复杂背景噪声下识别来袭激光信号，进而准确报警是激光告警面临的首要问题。

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This paper proceeds an evaluation of selection diversity in Nakagami fading channel according to the principle of maximum output level. Closed form expression of bit error rate is derived and compared with the principle of maximum signal noise ratio.

本文根据最大输出电平准则，对选择式合并在Nakagami信道上的性能作了比以往理论分析更符合实际的评价，导出了误码率的闭式解，并与最大信噪比准则时作了比较。

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As for target discrimination in the power spectrum image and the complex image, two main conclusions are obtained, one is the explicit relation between the resolution and signal-noise-ratio, the other is the explicit relation between the resolution and target relative phase.

分别针对功率图像和复图像的目标分辨，得到了明确的分辨率与信噪比的关系、分辨率与目标相对相位的关系这两个主要结论。

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The noise voltage, the noise current and their output voltages at the terminal of amplifier are calculated, and the signal to noise ratio of the optic electric conversion circuit is estimated.

分析了频带与噪声电压的关系，计算了光电探测器的噪声电压和噪声电流以及它们在放大器输出端形成的噪声电压，并对光电转换的信噪比进行了计算。

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