信噪比

Because camp film caused ion to have,also showed film is crepuscular as a result however like booster resolution and letter comparing of a confusion of voices drops somewhat.

然而结果也表明了由于离子壁垒膜造成了有膜微光像增强器分辨率和信噪比都有所下降。

Research on complex signal identification under low signal/noise rate based on high-order cumulant is put forward based on this idea.

本文对低信噪比情况下基于高阶累积量的复杂信号识别研究正是在这一基础上提出来的。

Then cumulant invariants are used to classify bandlimited MPSK signals. The method can work with lower SNR.

并利用此基带序列的高阶累积量构造分类特征不变量，在宽信噪比范围内实现了带限MPSK信号的调制分类。

This algorithm changes the detect points on the target trajectory to the respective curve in parameter space, which takes full advantages of the target detect data in a certain period, and the trajectory characteristics can also be picked up even under low SNR.

该算法把航迹上的观测点变换为参数空间的对应曲线，充分利用一段时间内的目标观测数据，在低信噪比下也能从背景噪声中提取目标的航迹特征，提高了声呐的检测概率，且对部分信息和数据的缺失不敏感。

Meanwhile, the high master frequency band signal acquisition channel makes full use of the cymoscope sensitivity and hardware dynamic range, has larger analog signals front-located gain, thereby reinforcing the signal-noise ratio of the high master frequency band signal, and bringing along benefits for the later stage high resolutions seismic data process.

同时由于高主频频带信号采集电路充分利用了检波器的灵敏度和硬件动态范围，具有较大的模拟信号前置增益，使得高主频频带信号的信噪比得到增强，为后期高分辨率地震资料处理带来了较大益处。

Then, main noise sources of the system are modeled by introducing 3-D noise model. At last, the assessment method of the degression of image enhancement algorithm on image noise is proposed.

仿真结果表明：经微光系统传递后，图像中的高频信息变模糊，加入噪声后，信噪比降低；而经过5帧平均算法后的图像质量明显改善，对比度增加。

And if 64 points per period was sampled, the signal to noise ratio could be improved by more then 5.6 times by demodulate algorithm.

在每周期采样64点的情况下，解调算法可将信噪比提高5.6倍以上

PSNR.-images of two-dimensional discrete wavelet transform, transform Series is greater than or equal to 3, and reconstructi...

对图像进行二维离散小波变换，变换级数大于等于3级，并进行重构，最后计算重构图像的峰值信噪比

First, the closed-form expressions of the receiver output signal-to-noise ratio distribution are derived and validated via simulation.

推导了存在反馈时延时，STD系统的输出信噪比分布和BPSK调制的误比特率表达式。

Under the basis of these, the lately widely used wavelet transform in DSP is used to wipe off the noise in the band of the signal frequency. Lastly, for its function of auto noise-resistance and double integral, the triple correlation is also used to improve the sensitivity of the receiver.

在此基础上，为了提高系统在低信噪比下的相关检测能力，采用了近来在信号处理中获得广泛应用的小波变换来去除信号频带内的噪声，并用三重相关对噪声的自动抑制作用和对信号的双重累积作用来提高接收机对回波信号的接收灵敏度。

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。