信噪比

Simulation results show that it has good performance in channel capacity, especially in the case of high SNR.

仿真结果显示通过这种方法确定的天线子集在信道容量方面也有很好的性能，尤其在高信噪比情况。

But usually, characteristic parameter of these methods has more requests for prior information of the signals, particularly for the prior estimate of signal noise ratio.

但是这些方法得到的特征参数，往往对于信号的先验知识有较多的要求，尤其是对信噪比的预先估计。

This text has put forward the concept of the template of image recognition and characteristic recognition vector.

当全息图的衍射效率极为不均匀，再现图像的信噪比极差时，直接识别的识别准确率极低。

As an assembled nanostructure, nanoelectrode ensembles or arrays present many advantages such as enhanced mass transport, lower double layer charging current, short time constant, lower electrolyte voltage drop, higher ratio of signal to noise, as well as good maneuverability, with high sensitivity and reliability in electroanalysis. Therefore, they have found broad applications in a variety fields including the study of electrochemical theory, biosensor, electrocatalysis and electrode materials in high energy chemical batteries.

纳米阵列电极作为一种人工组装的纳米结构体系，具有高传质速率、低双电层充电电流、小时间常数、小IR降及高信噪比、可操作性强和测量灵敏度高等优势，因而在电化学理论研究、生物传感器、电催化材料和高能化学电源电极材料等方面具有广阔的应用前景。

Chasseur D'Images indicates that there's an improved signal-to-noise ratio and dynamic range.

Chasseur D'Images称将会有改进的信噪比和动态范围。

An algorithm for weak chirp signal detection and parameter estimation is presented in this paper.

提出一种超低信噪比下 chirp 信号的检测与参数估计方法。

For present and future high capacity optical communication systems, chromatic dispersion compensation and polarization mode dispersion compensation are the necessary means of improving system performance.

高速光纤通信系统中，色散补偿和极化模色散补偿是提高信噪比、改善系统性能的必要手段。

To solv e this problem, a circular correlation method based on FFT for C/A code acquisition was discussed. To improve SNR in weak signal environments, this text put forward a modified acquisition by circular correlation. The analysis and simu lations indicate that the method can make the perˉ formance of acquisition in low SNR improved and verify its validit y.

针对弱信号环境下低信噪比的情况，研究了适合该算法的解决方案，并提出改进的捕获算法，理论分析与实验结果证实了该方法在弱信号环境下具有较好的捕获性能，并能大幅度减少捕获时间。

Based on the similarity of common reflection point trace gathers in one coherent zone, CRS stack can focus more energy on the vicinity of the reflector, and therefore can obtain a high signal-to-noise ratio zero offset section by stacking events with the same phase.

共反射面叠加利用了邻近多个共反射点道集的相似性，提高了资料的覆盖次数，从而压制了随机噪声，增强反射波同相轴的连续性，大幅提高了地震资料的信噪比。

By utlizing the division of light beam instead of single-point collimate and scan, the method acquire multiple-beam confocal measurement synchronously.

目前，三维共焦测量技术的研究正朝着如何提高空间分辨率和信噪比、扩大测量范围、增加扫描及数据采集的速度、实现在线监测等方向发展。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。