查询词典 signal noise ratio

The additive noise factor has relation with SOA"s linewidth enhancement factor and it is always larger than one, which means that interferometer"s output signal-to-noise is different under different working mode. Adopting feedback working mode we can obtain higher signal-to-noise ratio. The experimental results prove the correctness of theory analysis.

该附加噪声因子和SOA线宽增强因子相关且始终大于1，说明在考虑SOA的噪声时干涉仪在两种工作模式下输出信号的信噪比是不同的，采用返回式工作模式能获得更高的信噪比，实验结果和理论分析相吻合。

It can be seen from the theoretical analysis that the signal to noise ratio in the output of the canceler will improve when the signal to noise ratio in the reference input drops.

通过理论分析可以看出，随着本艇自噪声有源抵消器参考输入端信噪比的降低，系统输出端信噪比升高。

The simulation results show that the denoising effects of the three methods are all superior to that o f Fourier transform, and the influence of colored noise can be eliminated effectively by bispectrum methods. That is very i mportant for reconstructing LoranˉC signal under the condition of small signalˉtoˉnoise ratio, and also lays the fou ndation for digital LoranˉC signal processing.

仿真分析结果表明，三种方法的去噪效果都优于传统的傅氏变换法，且双谱估计能够有效地去除色噪声的影响，对于小信噪比条件下的罗兰C信号的提取和恢复具有重要意义，也为复杂环境下对罗兰C信号的数字处理奠定了良好的基础。

Signal to Noise Ratio: The ratio of the signal to the random noise in a set of data.

信噪比：平均到一个数据单元的信号与随机噪声的比值。

To estimate the high signal to noise ratio in every recorded trace using quantitative method and erase the recorded traces with low signal to noise ratio so as to form a standard trace with high signal to noise ratio.

在形成标准道时，利用定量估计信噪比的方法，对每个记录道分段进行信噪比估计，剔除信噪比低的记录段从而形成高信噪比的标准道。

The objective parameters, including fundamental frequency, jitter, shimmer, fundamental frequency standard deviation, maximal frequency, minimal frequence, normalized noise energy, harmonic-to-noise ratio, signal-to-noise ratio and maximal phonatory time which were measured mainly on a sustained /a/ were recorded on an Dr.

客观检测采用Dr.speech for windows嗓音评估软件，在长元音／a：／上检测下列参数：基频、基频微扰、振幅微扰、基频标准差、最大基频、最小基频、声门噪声能量、谐噪比、信噪比和最大发声时间。

At first, setting up the arith relation between the signal input and the signal output of the generalized multi-carrier system of the Discrete Fourier Test spread-spectrum; then setting equilibria parameters of the frequency field equilibria subcarrier of the generalized multi-carrier system of the DFT spread-spectrum according to channel frequency response, channel noise variance and equilibria method; then calculating average power of useful signal, interferential average power between signals as well as noise variance of the generalized multi-carrier system receiving terminal of the DFT spread-spectrum according to the arith relation as well as the frequency field equilibria parameter, and recomputing available signal information noise ratio, so as to calculate the available signal information noise ratio of the generalized multi-carrier transmission system accurately, the method for estimating the available signal information noise ratio can be used for link self-adapting transmission solution of the generalized multi-carrier system based on Discrete Fourier Test spread-spectrum and radio material management.

一种DFT扩频的广义多载波系统的SINR估计方法，其通过首先建立所述离散傅立叶变换扩频的广义多载波传输系统的信号输入输出之间的数学关系，然后根据信道频率响应、信道噪声方差和均衡方法，设定所述DFT扩频的广义多载波传输系统的频域均衡子载波的均衡系数，再根据所述数学关系及所述频域均衡系数分别计算所述DFT扩频的广义多载波传输系统接收端有用信号的平均功率、信号间干扰的平均功率以及噪声方差，再计算有效信干噪比，如此以实现对广义多载波传输系统的有效信干噪比的准确计算，该有效信干噪比估计方法可用于基于离散傅立叶变换扩频的广义多载波传输系统的链路自适应传输方案和无线资源管理方面。

By comparing the error correction capability and stability under different signal-to-noise ratio conditions, and packet loss rate of the block code and the convolutional code in the same signal-to-noise ratio condition, the results show that correcting ability of this algorithm is better than that of other method under the low delay condition, and it can adapt the different network delay condition.

通过对比在不同的信噪比条件下卷积码的纠错能力和稳定性，以及在相同信噪比的情况下对分组码和卷积码的丢包率，说明本文算法的纠错能力在低解码延迟条件下好于现有方法，能适应不同的网络延迟条件。

The invention performs pseudo bit error rate statistic by utilizing the message of multi sampling points in each modulation symbol of discretization system, and again performs one-to-one mapping by utilizing corresponding relation between the pseudo bit error rate and the signal-to-noise ratio, thereby obtaining signal-to-noise ratio estimation value.

本发明利用了离散系统每个调制符号中多个采样点的信息进行伪误码率统计，再利用伪误码率与信噪比之间的对应关系进行一一映射，从而得到信噪比估计值。

It is the relationship of the true signal to the noise signal, known as the signal-to-noise ratio, which is of most interest to the communication engineer.

这是关系的真实信号，噪声信号，为信号与噪声的比例，这是最感兴趣的通信工程师。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。