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noise ratio
相关语句
  噪比
    The Study of Signal to Noise Ratio of MAC Signal in Satellite Brodcasting
    MAC制信号在卫星广播中信噪比的研究
短句来源
    A TIME-DOMAIN AVERAGE METHOD TREATING THE CASE OF LOWER SIGNAL TO NOISE RATIO FOR MODAL PARAMETER IDENTIFICATION
    低信噪比情况下识别模态参数的时域平均方法
短句来源
    The Improvement of Signal to Noise Ratio of a FM Optical Transmitter by Electrical Feedback
    电反馈对FM光发射机信噪比性能的改善
短句来源
    The simulated experiments of woisy images using ICA algorithms aften wiener de-noising are implemented and the PSNR(Peak Signal to Noise Ratio)is used to provide quantitative evaluations of the feasibility and efficiency of the method.
    应用上述算法,对有噪图像信号进行仿真实验研究,通过比较降噪前后的峰值信噪比(Peak Signal to Noise Ratio,PSNR),说明该算法的可行性和有效性.
短句来源
    The experimental results showed that the average gain in Peak Signal to Noise Ratio was above 0.12dB and the average reduction in bit-rate was above 1.77%, so the proposed mode is an effective prediction mode for improvement of coding performance.
    实验表明该模式可以在标清、高清隔行视频的帧内预测上获得平均0.12dB以上的信噪比增益,平均减少1.77%的码流,是一种有效提高编码效率的预测模式。
短句来源
更多       
  噪声比
    This article introduced the ROI technology coding algorithm thought,realized the choice of value S of MAXSHIFT method,proposed the method of ROI mask that backtracking,finally after introduced ROI through the experiment the image compression to carry on the comparison,compared the coding of the image with two ROIs through the experiment finally,has obtained the good compression ratio and the peak value noise ratio.
    论文介绍了ROI技术的编码算法思想,实现了MAXSHIFT方法尺度值S的选择,提出了ROI掩膜的生成方法即回溯法,最后通过实验对有两个ROI的图像进行编码比较,获得了较好的压缩比和峰值噪声比
短句来源
    Simulation results show that this method can achieve about 6dB signal to interference plus noise ratio (SINR) gain when the interference bandwidth is as wide as two OFDM subcarriers and the system SIR is as strong as 0dB. As the bandwidth of NBI decreases, more SINR gain will be obtained.
    仿真的结果表明,这种新的干扰消除算法能够显著提高系统性能,特别是在干扰功率较强的时候。 举例来说,当干扰功率等于OFDM信号功率且干扰带宽为两个子信道宽度时,新算法能够带来6dB的信号干扰噪声比(SINR)增益。
短句来源
    The problem of the improvement of signal to noise ratio in the method of sampling display is analysed on a more general basis.
    本文在比前人的分析更为普遍的基础上研究了取样显示过程中信号噪声比的提高问题。
短句来源
    The signal to noise ratio for fixed point implementation of this algorithm is discussed The optimum coefficient with maximum S/N ratio are presented
    本文讨论了系数选择与信噪比的关系。 求出了递归算法的最佳系数,这些系数使得定点实现傅里叶交换时具有最大信号噪声比
短句来源
    The effect of mutual coupling on the performance of the signal to interference plus noise ratio (SINR) and the transient response is illustrated with the example of the planar array constituted by dipoles. It is shown that the mutual coupling betwteen the elements degrades the SINR and reduces the speed of response of the arrays with certain inter element spacing.
    以偶极子单元组成的平面阵为例 ,模拟计算了单元互耦对自适应天线的信号干扰噪声比和暂态反应时间的影响 ,说明在一定单元间距范围内 ,互耦会造成信号干扰噪声比下降及暂态反应速度减慢
短句来源
更多       
  噪声率
    Based on CDMA codes and their spatial information, the WLS multiuser detection algorithm combined the array pattern is provided. The calculation formulas for interference plus noise ratio(SINR) and bit error rate(BER) have been derived.
    基于DCMA编码和它们的空间信息,提供了结合阵列形式的WLS多用户检测算法,推导出干扰加噪声率(SINR)和误码率(BER)的计算公式.
短句来源
  “noise ratio”译为未确定词的双语例句
    Simulation results show that about a 1 to 1.5 dB gain in terms of SNR (signal to noise ratio) can be achieved over frequency-selective fading channels compared to conventional LDPC coded OFDM systems without ordering, and the proposed scheme is robust to CSI quantization.
    分析和仿真结果表明,相对于传统的无排序LDPC码编码OFDM系统,所提出的基于自适应排序LDPC码的OFDM系统可以获得1 ~1.5dB的性能增益,并且对CSI的量化具有鲁棒性.
短句来源
    Selection of carrier to noise ratio in CATV headend
    浅谈CATV前端载噪比C/N指标的选择
短句来源
    Accuracy considerations in the G/T value measurement of the earth station using carrier to noise ratio direct method
    载噪比直接法测量地球站G/T值的精度研究
短句来源
    An Analysis About Carrier to Noise Ratio of Cable Television’s Optical Fiber Transmission and nonlinear distortion
    CATV光纤传输的载噪比和非线性失真分析
短句来源
    A Novel Parameter Estimation Approach to the DS-SS Signal with Low Signal Noise Ratio
    基于DS-SS信号相位特性的参数估计
短句来源
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  noise ratio
Fast identification of digital amplitude modulation level at low signal-to-noise ratio
      
Simulation results reveal that the AR scheme with its decision algorithm outperforms the conventional and other modified TR schemes in generalized signal-to-noise ratio (SNR).
      
The SNR (signal-to-noise ratio) of the vibration signals of a diesel cylinder lid is the highest.
      
Identification of Discrete Linear Objects with a Large Signal-to-Noise Ratio
      
Methods for the conversion of image silver nanoparticles into luminescent products were developed; this considerably increased the signal-to-noise ratio of luminescence reading.
      
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The output signal-to-noise ratio (snr) of correlation detectors is analized.A correla-tion detector is a divice, which consists of two input filters, one output filter and one multiplier, and has two input pairs of terminals and one output pair of terminals.Unlike that described in papers[1][[2][[3] and[3], effects of input filters are consid ered in this paper. The formulation concerning the relation between the input snr and the output snr are derived, and special working conditions of correlation detectors...

The output signal-to-noise ratio (snr) of correlation detectors is analized.A correla-tion detector is a divice, which consists of two input filters, one output filter and one multiplier, and has two input pairs of terminals and one output pair of terminals.Unlike that described in papers[1][[2][[3] and[3], effects of input filters are consid ered in this paper. The formulation concerning the relation between the input snr and the output snr are derived, and special working conditions of correlation detectors are discussed.The conclusion is us follows: For small snr, the output snr is proportional to the products of two input snr; if the input snr of one channel is much lorger than the other and than 1, the output snr will be proportional to the smaller input snr; for all conditions (either strong signal, or weak signal) . the output snr of correlation detectors is comparable to the squar law detector's.

本文分析讨论相关检波器的输出信号杂音比,所谓相关检波器是这样一种装置,它包含两个输入和一个输出并由两个输入滤波器、一个输出滤波器和一个乘积器组成。和以前有过的讨论不同,文中考虑到了输入及输出滤波器的影响,导出了输入及输出信号杂音比关系的公式,讨论了相关检波器的几种特殊工作形式。结果指出,在小输入信号杂音比情况下,输出信号杂音比和两路输入信号杂音比的乘积成正比;在一路输入为大信号(相对于杂音)的情况下,输出信号杂音比和另一路输入信号杂音比成正比;无论在大信号或小信号输入情况下,相关检波器的输出信号杂音比与同样情况下平方检波器的输出信号杂音比是同量级的。

In this paper the information transmitting rate of delta-modulation (△M) system is discussed and compared with PCM system. It points out that the principal way of increasing the information rate is to decorrelate the modulating signal. The formulae of computing the signal-to-noise ratio of single integration and double integration delta-modulation systems are given. The signal-to-noise ratios and thier relations to pulse repetition frequency for both systems are calculated with typical modulating...

In this paper the information transmitting rate of delta-modulation (△M) system is discussed and compared with PCM system. It points out that the principal way of increasing the information rate is to decorrelate the modulating signal. The formulae of computing the signal-to-noise ratio of single integration and double integration delta-modulation systems are given. The signal-to-noise ratios and thier relations to pulse repetition frequency for both systems are calculated with typical modulating signal and the results are compared with PCM system. The views in the problem of compression-expansion with practical meaning for both PCM and △M systems are presented. The △M system is reviewed from the point of view of information theory.

本文将△调制与脉码调制进行了对比,讨论了信息率,并指出提高信息率的主要方向是解除信号前后的相关性;给出了计算一级和两级积分△调制系统的信噪比的公式;通过典型调制信号计算了信噪比及这个比值与脉冲重复频率的关系,并将所得结果与脉码调制作了比较;文中对两种调制系统中的压缩扩张问题提出具有实践意义的意见;从信息论的观点评论了△调制系统。

Some supplementations, unifications, and simplifications of the problem of optimum band-width of a filter approximately matched to high-frequency pulsed signal were made in this paper.For a filter approximately matched to a single rectangular high-frequency pulse, the case for a linear system with rectangular freguency characteristic detuned with respect to the rectangular high-frequency signal was discussed and the formula for calculating the optimum band-width of the system was obtained.For the case of pulse...

Some supplementations, unifications, and simplifications of the problem of optimum band-width of a filter approximately matched to high-frequency pulsed signal were made in this paper.For a filter approximately matched to a single rectangular high-frequency pulse, the case for a linear system with rectangular freguency characteristic detuned with respect to the rectangular high-frequency signal was discussed and the formula for calculating the optimum band-width of the system was obtained.For the case of pulse trains with uniform amplitudes, simplification and unification of some results of the other authors were made, it was pointed out that there exists a simple relation between the optimum value of attenuation of the delayed feedback system with unlimited band-width and the optimum teeth-width of a comb filter with single-tuned characteristic of the teeth. The comparison between these two systems was made by the use of the data of the other authors.For the case of rectangular pulse trains with non-uniform amplitudes, the accumulation of the rectangular pulse trains with trapezoidal envelope by the delayed feedback system with finite bandwidth was discussed, and formula of the signal to noise ratio at the output terminals was obtained. For finding the optimum bandwidth of the delayed feedback system, some numerical calculations were made, and curves of the signal to noise ratio with respect to the band-width were plotted. From these curves we found that in this case there exists an optimum band-width of the system, the value of which is wider then the optimum band-width of the system in the case of accumulation of rectangular pulse trains with uniform amplitudes.

本文对高频脉冲讯号近似匹配滤波器的最佳通频带问题,作了一些补充、统一和简化。 对单个矩形高频脉冲的近似匹配滤波器,本文讨论了矩形高频脉冲在失谐的情况下通过矩形频率特性系统时的最佳通频带,得出了计算公式。 对于等幅矩形脉冲串的情形,本文将前人的一些结果在计算方面作了简化和统一。明确指出了有衰减但频带不受限制的延时反馈系统的最佳衰减值和具有单谐振回路特性梳齿的梳形滤波器的最佳梳齿通频带间的对应关系,并用文献上的数据作了比较。 对于非等幅矩形脉冲串的情形,本文讨论了频带有限的延时反馈系统对包迹为梯形的矩形脉冲串进行积累的情形,得出了输出端讯噪比的表示式。为了求得最佳通频带,进行了一些数字计算,作出曲线。从曲线中得到这一系统对包迹为梯形的矩形脉冲串积累时,存在有最佳通频带,它的宽度比对等幅矩形脉冲串积累时的最佳通频带为宽。

 
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