查询词典 noise-power-ratio

Concerning the detection of weak speech signal in stronger noise background, an effective modified model based on Simulink and FDATool is proposed. The model is composed of double bandpass digital filter and traditional adaptive noise canceler.

针对强噪声背景中语音信号提取的难度，提出一种基于Simulink和FDATool的改进型信号提取模型，该模型在传统自适应噪声消除器SIMULINK模型的基础上通过增加双带通数字滤波器实现。

Through the noise analysis between circular oscillators composed of general differential amplifer element and of capacitive coupling differential amplifier element, it is found that the later,due to its band-pass and dynatron characteristics,provides a better anti-noise performance,which can be used in VCO circuits having a high requirement on frequency stability.

通过对采用由普通差分放大器单元和容性耦合差分放大器单元构成的环行振荡器的噪声分析得出，由容性耦合差分放大器单元构成的环行振荡器，因其带通特性和负阻特性而具有较好的抗噪声能力，可用于对频率稳定度有较高要求的VCO等电路中。

This algorithm firstly calculates the fourth-order cumulant and second-order central moment of the window and identify noise threshold. Later it adaptively adjusts the filter windows and right value according to the number of the noise points in the window.

算法首先计算窗口的四阶累积量和二阶中心矩并确定噪声点阈值：然后根据窗口内噪声点个数自适应调整滤波窗口，自适应计算权值；最后对噪声点逐点滤波。

A new method is proposed to apply generalized chi square distribution to describe the asymmetrical distributions of noise correlation,and using generalized Gaussian distribution to describe the symmetrical distributions of noise correlation.

实验结果表明，该方法与仅采用一个广义高斯分布的方法相比，可以使鉴别错误率降低38%以上，可见利用不同的概率密度函数来描述相应的分布是减小鉴别错误率的一个有效途径。

A pattern filter based on color noise pattern is proposed to remove this kind of color noise.

本文构造了一种基于模式识别的滤波方法，用于有色噪声的消除。

If the system is narrow band system,the noise is color noise and matching filter cannot be used.

如果系统是窄带系统，噪声为色噪声，无法使用匹配滤波器，不能提高信噪比。

This paper puts forward to a new way of generating colored noise using a novel all-filter phase digital filter. Compared to traditional FIR filter, the colored noise generated by using this filter has fewer spectrum leak, higher stop band attenuation.

本文提出用全相位数字滤波器这种新型滤波器滤波白噪声产生有色噪声的方法，这种方法比用传统FIR滤波器产生的有色噪声频谱泄漏少，阻带衰减功率大等优点。

Through the processing method basing on wavelets, implementing the removing noise about section gauss noise to colure full TV signal, we resolve the theory and practice problems in the processing of weak signal detection.

通过基于小波分析的处理方法，实现对彩色全电视信号一段被高斯白噪声干扰的降噪，解决微弱信号检测过程中遇到的理论和实践问题。

By detailedly deriving the equations of the input impedance, transconductance, voltage gain and noise figure, an inductive degeneration common emitter low noise amplifier which is used in an ultra high frequency receiver chip is designed.

通过详尽推导电感负反馈共发射极低噪声放大器的输入阻抗、跨导、电压增益以及噪声系数的表达式，讨论并设计了一个应用于超高频接收芯片的低噪声放大器。

The above formulas are used in theM standard spectrum and the three-section standard spectrum for evaluating the tread patterns' noise to provide a simple calculating tool and line-up comparison for analyzing the frequency spectrum of tread patterns' noise .

将三者之间的变换关系应用到轮胎花纹噪声评价M标准线和三段标准谱线中，为轮胎花纹噪声的频谱分析提供了简化运算工具和排队比较方法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。