量化误差

小数N频率合成器剩余量化误差补偿技术研究

The Research on Residual Quantization Error Compensation Technique in Fractional-N Frequency Synthesizer

信道矢量的量化误差对多用户MIMO预编码系统的性能影响较大。

The quantization error of channel vector greatly influences the system capacity in MU-MIMO precoding .

线性相位频率取样FIR滤波器量化误差的分析

Quantization Noise Analysis in Linear Phase Frequency Sampling FIR Filters

3摄像机CCD像面上像元的量化误差引起的测距误差。

The ranging error caused by quantization error of image element on CCD image plane of camera .

对压&扩PCM相对量化误差的一点看法

A note on relative quantizing error in companding PCM

对LED显示屏进行一致性校正，由于量化误差及视觉函数修正的影响，会产生相应的误差。

It will have the corresponding error on the uniformity correction to the LED display monitor for the influence of quantized error and the visual function .

本文指出，从减小随机数椐统计特性的量化误差角度考虑，应尽可能地减小量化系数q和采样间隔h。

From the view-point of decreasing quantization errors , the quantization coefficient q and the sampling interval h must be taken as small as possible .

同时，通过削弱量化误差以及在设定点附近引入PI补偿控制器，提高了系统的动态、静态性能指标。

The dynamic and static performance index is greatly improved through decreasing quantization errors and combining with PI controller that operate nearby set point .

新算法对CCD的量化误差、光强噪声、频率噪声的抑制能力也具有一定优势；

The results also illunimate that the new algorithm have the advantage over the other two algorithms in eliminating the CCD quantization , intensity noise , frequency noise .

介绍了采用锁存累加结构的∑-Δ调制器，分析了噪声成形中剩余量化误差的获取及补偿模型，并给出了运用于小数n频率合成器中的方法。

The Σ - Δ modulator with latched accumulator structure is introduced , the residual quantization error and compensation model in noise shaping are analyzed , and the method used in fractional-N frequency synthesizer is provided .

验证了DDS因为全数字结构带来的杂散来源，包括相位截断误差、幅度量化误差和DAC非线性误差等。

Sources of spurious signals for entirely digital structure of DDS include phase truncation error , amplitude quantization error and non-linear characteristics of DAC .

基于隐马尔可夫模型的多频率线跟踪算法，能在很低的SNR环境下工作，但量化误差较大，和计算量大。

The HMM based multiple frequency line tracking algorithms of work well under very low SNR , except for a high complexity of computation and for generally unnegligible quantization error .

从而有效地解决了由于频率控制字的所带来的量化误差，简化了DDS的控制，减少了实现DDS所需资源。

The improvement efficiently ( eliminates ) the quantitative error of the frequency control word , simplifies the control of DDS , decreases the required source to implement DDS .

针对三维测量中测量精度不高的问题，运用多种方法进行改进：提出了一种新的插值标定算法，进行了系统的GAMMA校正、畸变校正以及抑制量化误差，提高了标定与测量精度；

Several methods were used to improve the system calibration and measurement accuracy . A novel interpolation algorithm for calibration was proposed , system gamma and distortion correction was used , and sampling error was controlled .

借助Matlab的S函数进行仿真研究，结果表明常规模糊控制器虽然存在一定程度的量化误差，但这并不是产生极限环振荡的惟一原因，没有一种理想的模糊控制规则也是其原因所在。

By the means of S - function of Matlab , the simulation results indicate that quantization error existed in normal fuzzy controller is not the only reason of limit cycle oscillation , no ideal rules of fuzzy control also leads to oscillation .

介绍了理论模拟数据的FFT频谱分析，分别研究了量化误差、由放大通路的有限压摆率所引起的误差和非线性误差对信号频谱的影响以及它们之间的相互叠加后的频谱。

We analyzed FFT spectrum of ideal analog data with quantity error , theoretical data with nonlinear error and error from limit slew rate of amplifier . We also analyzed FFT spectrum of data with combined errors .

采用本文所提出的说话人识别策略，与单HMM识别方式相比可以减少前端量化误差，提高HMM的识别精度，由VQ识别结果与HMM识别结果共同决定最终识别结果，提高了系统的可靠性。

Comparing with the signal HMM recognition , this strategy may decrease the error of vector quantization and increase recognition precision of HMM. The recognition result is credible for decided by VQ and HMM.

采用相对量化误差和拓扑误差两个指标表征聚类质量，选取聚类结果最好的SOM输出层结合k-均值法进行用户负荷曲线划分。

Two indices , namely relative quantization error and topology error were introduced to evaluate clustering quality . We chose SOM output layer of best performance and allocate load profiles with k-means method .

相比标准SOM算法能有效提高网络映射的准确程度，降低网络的量化误差和拓扑误差，同时也降低了错聚率，实验结果验证了本算法的有效性。

The experimental results showed that this algorithm can obtain good clustering results . Compared with standard SOM algorithm , PSO / SOM can improve the clustering accuracy with lower quantization error and topological error .

讨论了FFT应用过程中的A／D转换量化误差、频谱混迭现象、频谱能量的泄漏以及频谱的栅栏效应等主要误差因素对分析结果的影响。

Based on the essence of fast Fourier transformation , the main errors encountered in the quantizing distortion in A / D converting , as well as the leakage effect , aliasing effect and railing effect in signal spectrum analysis are discussed .

利用线性化原理，在其线性化采样系统Schur稳定和固定量化误差受限的条件下，证明了原非线性采样系统的解是一致终极有界的。

Under the conditions of Schur stability of its linearized sampled-data system and the constraint of fixed-point quantization , the uniformly ultimate boundedness of the nonlinear sampled-data system is obtained .

使用ECL电路的数字方案很大程度上抑制了触发误差的影响，具有较高的测量分辨率，但此时量化误差仍不容忽视。

The digital scheme in ECL circuits holds down trigger error in a great degree , which has higher resolution . At the same time , the existence of quantified error should not be neglected .

与RVQ算法相比，该算法生成的码本量化误差小，可改善系统和容量性能。

With small quantization error , the algorithm has a better sum capacity performance than RVQ algorithm .

根据奈奎斯特采样定理，对插值滤波器进行了采样频率分析、量化误差分析，并得出分辨率与OSR的关系。

This paper analyzes the interpolation filter under different sampling velocity and qualified differences according to Nyquist Sampling Theory and educed the relationship between resolution and OSR consequently .

通过对DDS实际频谱曲线的分析，发现产生了在理论分析中相位截断误差及幅度量化误差产生的杂散之外的其它杂散来源，特别是时钟泄露与输出信号及它的谐波的差拍产生的杂散。

Based on the spectrum analysis , except for some spurious sources because of phase truncation and amplitude truncation in theoretical analysis , spurs come from the DDS , and the beat frequency of the output signal , its harmonics and clock leakage .

利用DCT系数分布的规律，提出了基于DCT系数分布的PSNR的无参考图像质量评估算法，这一算法利用AC系数和DC系数的分布规律计算出图像的量化误差，然后计算出整体的PSNR值。

A no reference image quality assessment PSNR algorithm based on DCT coefficient distribution law is proposed , this algorithm uses the distribution of AC coefficients and DC coefficients to calculate the quantization error of the image , and then calculate the overall PSNR value .

直接数字频率合成中，由于ROM的数据位字长有限，因此存放在其中的正弦波幅值有量化误差，这个量化误差将在D／A输出端产生杂散分量。

The amplitude values of stile wave kept in the ROM have quantization errors since the ROM 'S wordlength is finite in the direct digital systhesizer . The quantization errors produce the spurious components in the D / A converter output .

即使篡改图像经过JPEG压缩、加噪甚至裁剪处理，该算法仍然具有较好的检测效果。（2）提出了一种基于量化误差的不同幅JPEG图像间复制-粘贴篡改检测方法。

Even tampered image is suffered from JPEG compression , adding noise or cutting processing , the algorithm still has a good detection result . ( 2 ) A method based on quantization error for detecting copy-move tampering between the different JPEG images is proposed .

首先提出了在角度随机游走为主要误差源的情况下，RLG的离散输出模型。在假设累积角度量化误差为白噪声的前提下推导了方差（或Allan方差）分析中的量化误差模型。

The discrete output model of the RLG is put forward when random walk is the main error source , and the quantization error model in the variance ( or Allan variance ) method is deduced on the hypothesis that the quantization error can be treated as white noise .

在对DRLG信号进行抖动剥除解调时，Allan方差分析表明由于量化误差是主要误差源之一，高分辨率信号处理能够有效减小量化误差、提高DRLG的测量精度。

Allan variance analysis prove that quantization error is the main error source when getting ride of dither signal with the method of dither-stripping , and that high resolution signals processing effectively reduces quantity error and improves the accuracy of DRLG .