噪声功率

基于噪声功率谱的IC组件内部故障定位方法研究

Study on Fault-location in IC Device Based on Noise Power-spectrum

利用多项式拟合和MATLAB估算红外成像系统的归一化噪声功率谱

Estimation of Normalized Noise Power Spectrum of Infrared Imaging System with Polynomial Fitting and MATLAB

基于噪声功率估计的抗窄带干扰接收机自适应PN码捕获技术

Adaptive PN code Acquisition Technique Based on Noise Power Estimation In Narrowband Interference Suppression Receiver

一种基于噪声功率估计的MC-CDMA信道估计算法

A MC-CDMA channel estimation algorithm based on noise power estimation

比较了纯PN结雪崩二极管和带有隧道穿透的PN结雪崩二极管的噪声功率谱密度。

The spectral noise power density of pure avalanche diodes is compared with that of avalanche the diodes with tunneling penetration .

在无线传输系统中，低噪声功率放大器（LNA）是一个重要的组成部分。

Low Noise Amplifier ( LNA ) is an important part of wireless transmission system .

主要以GPS接收机的载波噪声功率密度比（C/N0）为基础，分析压制干扰对GPS接收机载波相位测量精度的影响。

On the basis of carrier noise power density rate ( C / N0 ) of GPS receiver , it analyzed the influence of suppressed jamming to carrier phase measuring accuracy of GPS receiver .

详细介绍了杂波噪声功率比的估计方法及其在MTD系统中的应用。

This paper introduced the estimation of clutter noise ratio and its application in MTD system in detail .

本文根据GPS接收机伪距测量的原理，以GPS接收机的载波噪声功率密度比（C/N0）为基础，分析压制干扰对GPS接收机伪距测量精度的影响。

The influence of jamming to pseudo-range measurement precision of GPS receiver is analyzed on the basis of density ratio of carrier noise power of GPS receiver according to the theory of GPS receiver pseudo-range measurement .

分析表明：不同天线仰角间的G／T值可以换算，ΔG／T等于不同天线仰角下测量的背景冷空噪声功率之差。

Analysis indicates : the system G / T at different antenna elevation angles can be converted each other ,Δ G / T is equal to the difference of background cold sky noise power measured at different antenna elevation angles .

结果表明：降低APD的工作温度有利于减小APD的等效噪声功率，APD存在最佳工作温度。

Experimental results show that NEP of APD can be reduced by reducing the temperature , and there is an optimal working temperature for APD .

采用恒模阵列和自适应信号对消器估计出各个信号的波达方向（DOA），应用最小干扰噪声功率判据获得最优加权向量。

Constant modulus array ( CMA ) and adaptive signal canceller estimate the direction of arrival ( DOA ) of every signal and use the optimum weighted vector to form the beams .

海拉尔兰州核查地震台阵的勘址和地动噪声功率谱的计算其模拟结果表明，该方法不但能有效地获得AR模型参数的最佳估计，而且能实现低信噪比的信号检测。

Array site survey for two new IMS primary stations in China and their power spectrum estimations of ground motion noise Several signal spectrum estimations have been obtained by means of this kind of parameter estimation .

给出了信道均衡器的信噪比与信息序列、训练序列以及噪声功率的关系，并根据此关系推导了ST系统基于均衡器信噪比最大的训练序列和信息序列最优功率的表达式。

The relationship between the SNR of the channel equalizer and the training sequences power is analyzed . The optimal power allocation of the training sequence is derived based on the criterion of maximizing SNR of the equalizer .

根据SAR图像噪声功率一般存在于信号小尺度，没有跨尺度特征，而目标信号的边缘具有跨尺度的特点，本文提出了一种多尺度积信号增强和去噪的SAR图像船舰目标检测算法。

Considering the noise power exists small scale and the boundaries of target signal exist cross-scale in SAR images , we propose a novel scheme which enhances signal and removes noise based on multiscale products method to detect ship targets .

通过实验探讨了APD的温度特性，得到了APD的雪崩电压、暗电流、光电流、等效噪声功率与温度的关系。

Experiments were done to probe into the characteristics of APD . The relationships between avalanche voltage , dark current , photocurrent , NEP and temperature were educed separately .

基本思想是使用线性泛函不等式约束在感兴趣的空域范围内保证SF响应的平坦性，同时使输出噪声功率最小化。

The method is to minimize the array noise power subject to the linear functional inequality constraints , which ensure the flat response of the spatial filters in the interest of spatial sector .

针对静电在MOS器件中引入的潜在损伤，在使用1/f噪声功率谱监测的同时并提出了一种新的由1/f信号提取得到的基于子波变换极大模的相似系数表征法。

Aiming at latent damage induced by ESD , 1 / f noise spectrum and a new method similarity coefficient based on the matched maxima of wavelet transform modulus are offered at the same time .

过采样ADC通过过采样技术，将基带中的量化噪声功率降低（特别是当采样频率比基带频率大很多时），提高了基带内的信噪比，达到了增加转换器的有效量化位数的目的。

Over-sampling ADCs reduce quantization noise power in the baseband ( Especially when sampling frequency is greatly larger than baseband frequency ), and improve the base-band signal to noise ratio , to increase the resolution of the converter .

研究了仿真中噪声功率的计算方法，用MATLAB对透明转发方案与MF-TDMA/CWTDM系统链路进行仿真，比较采用不同转发方案的系统在高斯噪声下的性能，研究噪声累积带来的影响。

The thesis also discusses the calculation of the power of noise , and has completed the simulations of the system link of transparent repeater scheme and MF-TDMA / CWTDM scheme via MATLAB , and researches the influence of accumulation of noise by comparing different systems . 3 .

根据样本空域协方差矩阵对角元素可以表示成信号功率与噪声功率之和的特性，构造BP求解算法以进行DOA估计。

According to the particular feature that the diagonal elements of the spatial covariance matrix of wideband samples are equivalent to the sum of variances of the noise and all the signals , we construct a BP problem which is solved for DOA estimation .

对8mm波.其等效噪声功率为6.9×10（－10）WHz（－1）.响应率为406V／W。

For 8mm wave , the responsivity is 406V / W , noise equivalent power NEP is 6.9 × 10 ( - 6 ) WHz ( - 1 ) .

对于采用BPSK调制的IR-UWB通信系统，文中计算了在固定信噪比和固定噪声功率谱的两种不同情况下，接收机与发射机间具有不同相对位置情况下的误码率。

For IR-UWB system with BPSK modulation , the bit error rate is calculated for UWB receiver at different directions under situations of fixed signal-to-noise ratio or fixed noise power spectrum density in the channel .

对低噪声功率放大器的设计，1dB压缩点（P1dB）和3阶截取点（IP3）是其2个关键参数，对他们进行正确的分析和优化是非常必要的。

P1 dB and IP3 are key parameters for the design of low noise amplifier . So correct analysis and optimization of them is very indispensable .

基于高频地波OTHR的信号分辨与检测机理，从相位噪声功率谱密度的角度对相参解调方式和非相参解调方式进行了比较分析。

Based on the signal resolution and detection mechanism of HF ground wave OTHR , the differences between the coherent demodulation and the non-coherent demodulation are analyzed , according to the phase noise power spectral density .

分析结果显示，所提出的FAFD频率检测方法相对于RCFD具有较高的检测增益和较低的自噪声功率，在显著降低MLFD的实现复杂度的情况下，并未明显降低其检测性能。

The result shows that the detector presented in this paper has higher frequency detecting gain and lower self noise power than RCFD ( reduced complexity frequency detector ), and it substantially reduces the realization complexity of MLFD without significantly degrading the performance .

舰船辐射噪声功率谱特征提取方法研究

A New Power Spectrum Feature Extractive Method of Ship Radiated Noise

运动模糊图像的噪声功率的精确估计

Estimation of the Noise Power of Uniform Linear Motion Blurred Images

电视视频噪声功率与加权压缩分析

An Analysis of the Video Noise Power and the Weighted Compression

上海地震台阵地动噪声功率谱分析

Power spectrum analysis of ground motion noise in Shanghai Seismic Array