量化噪声

量化噪声对插值FastFouriertransform谐波估计的影响

Influence of quantization noise on harmonic analysis via interpolated fast Fourier transform

为了实现星载合成孔径雷达（syntheticApertureRadar，SAR）成像处理器小型化和实时信号处理，该文重点研究定点运算和有限字长存储引入的量化噪声。

Quantization noise from fixed-point processing and limited word length storage affect real-time imaging and system miniaturization in spaceborne synthetic aperture radar ( SAR ) imaging processors .

测量信号中始终包含着脉搏波与呼吸波，同时还有电路的随机噪声和AD转化的量化噪声。

The signal acquired is consist of pulse wave and respiration wave , as well as circuit noisy .

DFT过程对A/D转换量化噪声的削弱作用

The Effect of DFT on Weakening Quantizing Noises of A / D Conversion

在高阶IIR滤波器实现中减小量化噪声的一种方法

A Method of Noise Reduction in Realization of High-order IIR Filters

降低CGH再现像量化噪声的新方法

A New Method for Reducing Graduated Noise of CGH

主要分析了线性相位频率采样FIR滤波器中的量化噪声，并给出计算公式。

Quantization noise analysis of linear phase frequency sampling FIR filters was discussed , and computation formula for measuring quantization noise was described in this paper .

数字闭环光纤陀螺中，采用AD转换器将模拟信号转换为数字信号，AD转换中的量化噪声将直接影响光纤陀螺的零漂指标。

In digital closed-loop fiber optic gyroscope , AD converter is used to translate analog input into digital signal . Quantization noise in AD conversion will influence bias stability of FOG .

在图像预处理阶段，采用3D平滑高斯模板进行低通滤波，有效地消除了图像的量化噪声，提高了相邻像素的相关性。

In the stage of image preprocessing , the image quantization noise is eliminated and the correlation between adjacent pixels is improved effectively by using the low-pass filter base on templates of 3D Gaussian smoothing .

sigmadelta调制器使用过采样技术与量化噪声整形相结合的方法，使高精度ADC的设计成为可能。

Sigma Delta modulators make the design of high resolution Analog-to-Digital Converter ( ADC ) feasible by employing the oversampling technology combined with quantization noise shaping methodology .

文中主要研究瑞利平衰落信道下量化噪声对最大比合并（MRC）接收分集合并输出信噪比的影响。

This paper focuses on the influence of quantization noise in MRC combining in Rayleigh Flat-fading channel .

定量分析了星载合成孔径雷达（SAR）原始回波信号的量化噪声、饱和噪声以及误码噪声对面目标信噪比的影响；

The effect of quantification noise , saturation noise and bit error noise of synthetic aperture radar ( SAR ) raw data on the signal to noise ratio of distributed targets is analyzed .

主要介绍了目前比较流行的∑/Δad转换技术，并对其中主要技术过采样、量化噪声整形、数字滤波和采样抽取做了简单说明。

The ΣΔ A / D conversion technique is introduced , and basic principles of Σ / Δ AD converter , including oversampling , noise shaping digital decimation filtering are simply discussed in this thesis .

将模拟器件偏差、增益偏差、偏置偏差、量化噪声等现实误差引入到混合滤波器组ADC系统中。

The realization errors such as analog imperfections , gain errors , offset errors and quantization noises are introduced into the hybrid filter banks ( HFB ) ADC system .

利用混合滤波器组ADC系统之综合滤波器组的多相结构，对混合滤波器组ADC系统量化噪声进行了详细研究。

On the basis of the distortion / aliasing functions , quantization noise of hybrid filter bank ADCs is studied with polyphase structure of its synthetic filter bank in detail .

分析了全电视信号PCM编码色度副载波量化噪声，并讨论了量化噪声与取样频率fs和量化比特数n的关系。

This paper analyses colour subcarrier quantization noise in PCM coding of complete television singal . The relationship between quantization noise and sampling frequency ( f s ) as well as quantizing bit number ( n ) is discussed .

传统的奈奎斯特模数转换器要求模拟电路具有高精度。相反，过采样ADC利用过采样技术，降低基带中量化噪声的功率，提高内部通带的信噪比，实现使转换器增加有效量化位数的目标。

Conventional Nyquist Analog-to-digital converters require precise analog circuits . In contrast , oversampling converters use oversampling technique , make the quantization noise power small in baseband , increase the SNR in baseband and achieve the more ENOB .

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 .

测量得到的解码输出的信号/量化噪声比约为87dB，总的MIPS开销约为60。

The SQNR of the decoded output is measured , about 87 dB , with the overall MIPS overhead about 60 .

文章对于离散多音DMT（DiscreteMultitone）系统中量化噪声和削波噪声进行了详细的分析，提出了DMT系统中进行削波率最优设计的原则和方法。

Based on the analysis of clipping noise and quantisation noise in Discrete Multitone ( DMT ) systems , criterions and methods to optimize the clipping rate in DMT systems are presented in this paper .

Sigma-Delta调制器作为Sigma-Delta模数转换器的核心，采用过采样技术和噪声整形技术有效地抑制了信号带内的量化噪声，从而达到提高调制器性能的目的。

As the core of Sigma-Delta ADC , Sigma-Delta Modulator employs oversampling and noise shaping technology to effectively suppress the signal-band quantization noise , so as to improve the performance of the modulator .

对级联积分滤波器（CIC）的频率特性进行了分析，选择了适当的结构与阶数，实现对输入信号的采样频率下降16倍、衰减了高频处的量化噪声。

The frequency characteristics of the cascaded integrator comb ( CIC ) filter was analyzed , with appropriate structure and order determined . The sampling frequency of the input signal decreased 16 times , and the quantization noise at high frequency was attenuated .

本文通过定量地分析离散傅里叶变换过程对A/D转换量化噪声统计特性的影响，得出如下结论：对于采取舍入式量化误差形式的A/D转换量化噪声，由于DFT过程的求和平均效应而受到抑制。

- By quantitative analysis of the effect on the statistic property of quantizing noises produced by A / D conversion , which exist in the DFT process , the conclusion is that the round-off quantizing noises will be depressed by average effect of the DFT .

文中给出了算法在信号域内的信号对量化噪声比（RSQN）和均方根相位误差这两个性能指标的评估结果；并给出了SAR原始数据经BAQ处理后的成像结果；

The performance evaluation in signal domain of this BAQ algorithm based on signal to quantization noise ratio ( SQNR ) and RMS phase error is presented and the processed SAR image after encoding / decoding with this BAQ algorithm is given .

此外，高效混合电子科技大学博士论文滤波器组ADC系统的量化噪声研究结果表明其有效分辨率比其ADC提高在基本放大器近似为单向有源网络的前提下，求得了四种反馈放大器的简洁条件。

By simplifying the ADC system , a specific kind of high effective hybrid filter banks ADC system is proposed too . Under the circumstances that the basic amplifier is approximately a one-way active network , the simplifying conditions of four basic types of feedback amplifiers are derived .

时钟频率给定后，输出信号的频率取决于频率控制字，频率分辨率取决于累加器位数，相位分辨率取决于ROM的地址线位数，幅度量化噪声取决于ROM的数据位字长和D/A转换器位数。

As the referenced frequency is fixed , the output frequency , the phase quantization noise and the resolution of frequency and phase are due to frequency word , the value of ROM and the bits of D / A converter , the bits of accumulator and ROM respectively .

提出可嵌入水印的小波系数集生成方法，扩展了基于视觉系统（HVS）小波域量化噪声的视觉权重（JND）分析方法，使其适用于DEM数据，并能够自适应地确定水印嵌入的强度。

A method is presented to build the wavelet coefficient set which can embed watermark information . The bit is inserted in the high activity texture regions with the maximum strength of Just Noticeable Distortion ( JND ) tolerance of Human Visual System ( HVS ) .

分析了全息光学头中的关键元件HOE的衍射效率与位相量化噪声，通过槽纹轮廓结构参数优化与改善工艺提高衍射效率，实现HOE元件的实用化。

An analysis is made of the diffraction efficiency and phase digitized noise of HOE , being a key element in holographic optical heads . HOE has been practicable through optimizing its groove and improving its fabrication process which aim at enhancing the diffraction efficiency .

WLP技术用来构造一对前滤波器和后滤波器，其中前滤波器用来降低MDCT编码过程中前回声的产生，后滤波器可以对量化噪声进行整形，从而进一步提高重建音频的主观听觉质量。

WLP technique is employed to construct a pre - and post-filter , where the pre-filter could reduce the pre-echo resulting from MDCT coding and the post-filter is used to shape the quantization noise spectrum so that the subjective perceptual quality of reconstructed audio signal can be improved .

充电泵增益失配对∑Δ量化噪声影响的研究

Research on Effect of Charge Pump Gain Mismatch on ∑Δ Quantization Noise