噪声带宽

本文论述了通过MATLAB软件对干涉仪锁相环及其等效噪声带宽测量的建模和仿真，验证了实现干涉仪锁相环等效噪声带宽高精度测量的正确性和可行性。

This paper discusses the modeling and simulation of interferometer phase-locked loop and its equivalent noise bandwidth through MATLAB software , and verifies the correctness and feasibility of realizing high accurate measurement with the equivalent noise bandwidth of interferometer phase-locked loop .

实现了Costas环的数字化设计，重点阐述了环路中重要参数的设计，环路等效噪声带宽越小，捕获时间越长，但抗噪性能越好，实际应用时要根据具体情况合理设计。

The digital Costas loop is realized , focusing on the design of the key parameters . The smaller the equivalent noise bandwidth of loop is , the longer the acquisition time lasts , but the better the anti-noise performance presents .

与载波环相似，DLL颤动也与C/N0、噪声带宽以及预检测积分时间紧密相关。

Similar with carrier loop , tremble of DLL was related with C / N0 , BW of Noise and T.

此外，还分析了由于该并行均衡器的引入，对APRX环路稳定性、环路噪声带宽等性能所产生的影响。

Analysis of the loop stability and loop noise bandwidth of the APRX with the fractionally spaced equalization algorithm shows that the algorithm is more effective than the T-Spaced Equalizer .

取样锁相环的实用噪声带宽公式

Simple and Practical Formulae of Noise Bandwidth for Sampled Phase-locked Loops

电-液伺服系统的等效噪声带宽及其精度分析

Equivalent Noise Bandwidth of the Electro Hydraulic Servo System and Analysis of Its Accuracy

干涉仪锁相环等效噪声带宽高精度测量的仿真实现

Realizing High Accurate Measurement by Simulation of the Equivalent Noise Bandwidth of Interferometer Phase-locked Loop

导出了系统的单位冲激响应、传输函数和等效噪声带宽；

The unit impulse response , transmission function and equivalent noise bandwidth of the system are deduced ;

此外，文中给出了电视线路门限电平与中频等效噪声带宽关系的计算曲线；

Level Value for Environmental Noise Moreover , the paper also gives the calculating curves of the relationship between threshold levels of T.

分析了信号的数字频谱，并在此基础上，推导了系统输出信噪比与系统采样速率的关系。得到了随着系统采样速率的提高，匹配滤波器的噪声带宽减小，输出信噪比提高的结论。

And on the basis of the analysis , the relation between sampling rate and signal to noise ratio is deduced in this paper .

本文针对噪声带宽对测速系统指标的影响，对测速环路的噪声带宽选择作了详细的理论分析。

This paper analyses the effect of noise bandwidth on rating system and explains in theory the selection of noise bandwidth for digital rating loop .

通过噪声带宽分别衡量不同指数平滑预测模型引起供应链库存波动的程度，并且通过匹配滤波的方法可以减少不同预测模型引起供应链的波动性。

The extent of inventory fluctuating induced by different smoothing forecasting model can be measured by noise bandwidth , and the inventory fluctuating can be reduced by matched filtering .

提出用等效噪声带宽来评价电－液伺服系统噪声误差的思想，并就位置伺服系统精度进行了分析，得出了计算各类误差的表达式。

This paper proposes that using equivalent noise bandwidth evaluates noise error of the electro hydraulic servo system , analyses the accuracy of the position servo system , and obtains some expressions calculating various errors .

本文应用双线性变换，导出了离散全方积分计算公式的新结果，并据以给出了几种主要取样锁相环的简单而实用的噪声带宽公式，以及这些公式之间的关系。

New computing formulae for the discrete total square integral are derived by means of bilinear transformation . Simple and practical formulae of noise bandwidth for several main sampled phase-locked loops based on the integral expressions and the important relationship of the formulae are given .

利用NETD和探测器测试数据计算红外成像系统的噪声等效带宽

Computation of Noise Equivalent Bandpass of Infrared Imaging System with NETD and Test Data of Detector

半导体激光器的噪声和带宽的测量

Measurement of Noise and Bandwidth of Semiconductor Lasers

考虑到角噪声的带宽远远大于系统带宽，认为角噪声实质上是白噪声；

Considering the bandwidth of he angular noise is much large than the system bandwidth , so it is convenient to regard the angular noise as white noise .

表明该种接收机误码性能不仅与信噪比有关，而且与噪声输入带宽和积分时间有关，其特性可类推到其他类型的自相关接收机。

The result shows that the receiver performance of BER is relevant to not only signal-to-noise ratio , but also input noise bandwidth and integration time . The characteristics can be applied to other kind of autocorrelation receivers .

水声信道具有多径扩展、高环境噪声、带宽受限、传输时延大、起伏效应和多普勒频移大等特点，这极大地制约了水声通信系统的可靠性和有效性。

Underwater acoustic channel experiences severe Multi-path extension , high ambient noise , limited bandwidth , large transmission and propagation delay , fluctuation effect and great doppler frequency shift . These features greatly reduce the reliability and effectiveness of underwater acoustic communication system .

本文主要涉及三方面内容为多模光纤、单模光纤及集成光学，讨论了有关模式噪声、带宽频谱，单模传输的双折射等新现象和新问题。

This paper mainly deals with three respects , namely : multi-mode fiber , monomode fiber and integrated Optics . New Phenomena and Problems Concerning the modal noises , bandwidth spectrum , polarization birefringence of single mode transmission and etc , are discussed .

CDMA作为一种抗噪声强、带宽分配灵活，保密性强的传输接入方式被广泛的应用于民用、军用低轨卫星通信系统中。

CDMA technology is widely used in LEO satellites communication because of many merits offered by CDMA system such as suppression of ingress noise , flexibility of bandwidth assignment and the security .

近年来，由于光参量放大器（OPA）能实现高增益，低噪声及大带宽的信号放大而备受关注。

For the past decades , the Optical Parametric Amplifier ( OPA ) has attracted worldwide attention because of the potential for achieving high gain , low noise and large bandwidth .

弹性空腔噪声的有限带宽预估法

Band - Limited Prediction Method for Elastic Cavity Interior Noise

一种基于噪声模型的带宽估计改进算法

An Improved Algorithm of Bandwidth Estimation Based on Noise Model

锁相环相位噪声与环路带宽的关系分析

Relationship Analysis between PLL Phase Noise and PLL Bandwidth

文中还讨论了取样间隔以及噪声的归一化带宽对系统性能的影响。

In addition , the effects of sampling interval as well as noise unity bandwidth are discussed .

一种基于雷达视频波形的噪声调频干扰带宽辨识算法的研究

Research on a New Algorithm for Identification of Noise FM Jamming Band Width by Video Waveform of Radar

结果表明：类噪声脉冲的带宽随着腔内净色散的增加而增加，并在腔内净色散为微正时达到最大值。

Results show that the spectral bandwidth of noise-like pulse will increase as the net cavity GVD increases and attains maximum when the GVD is slightly positive .

本文提出了一种基于雷达视频波形的噪声调频干扰带宽的辨识算法。并在地空导弹雷达制导站实地录取了干扰数据，用该算法进行了实验研究。

In this paper , a new algorithm for identification of noise FM jamming band width based on video waveform of radar is proposed and has been experimented .

实验表明，谐波频谱技术由于受频谱仪内部噪声和测量带宽的限制不适合测量低抖动高重复频率的光脉冲。

The experiment shows that the harmonics spectrum analysis technology is not suitable for measurement the laser pulses which has the low jitter and high repetition rates since the bandwidth limit and the large internal noise of spectrum analyzer .