查询词典 signal noise ratio

Integrating trellis-coded modulation with threaded algebraic space–time block code, trellis-coded modulation space-time block code is presented, which has the advantage of full-diversity and small detection delay. Based on TCM pre-processing, the minimum distance between different codeword matrixes of the TCMST block code is maximized, so the average bit error rate of the TCMST block code is lower than that of the TAST block code at the same signal noise ratio.

TCMST分组码具有满发送分集度和检测延迟小等优点；由于采用了TCM预处理，使得不同TCMST分组码码字矩阵间的最小距离达到了最大化，因此在相同信噪比情况下，TCMST分组码具有比TAST分组码更低的平均误比特率。

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。

A new type of the non-modulation fluorometer has been built which has higher signal/noise ratio. responsibility and accuracy, much lower power consumption, and faster data acquisition rate, etc. This new software witten in C language can run in the IBM PC compatible computer.

新研制的荧光计的软件用C语言编写，可在IBM PC兼容机上运行，采样速度最快可达25μs/点，对Fo和Fi等参数的测定更加可靠和精确。

Signal-noise ratio is an important parameter for the performance of a heterodyne detection system.

对于光学外差探测系统而言，为了有效利用回波信号，需要对信噪比这一表征系统性能的重要指标进行研究。

Complex data form, low signal -noise ratio, bad data repetitiveness, uncertain environment are the inherent characteristic of AE signal, so it is difficult to obtain numerous topic training data.

复杂的数据组成，低信噪比，数据重复性差，环境不确定是声发射信号的固有特征，因此难以获得大量的典型训练数据。

In SAR azimuth signal processing, it is very common to subsample the raw data with a filter, which may reduce the Signal Noise Ratio of the raw image.

摘要机载合成孔径雷达的方位向降采样经常会降低原始图像的信噪比。

The system is based on optical heterodyne structure, and use half wave plate, quarter wave plate and polarization beam splitter to improve the intensity of Doppler signal and signal-noise-ratio.

系统采用了外差式纵向激光多普勒测量结构，利用1/2波片、1/4波片与偏振分光棱镜相结合及外差式参考光结构，有效地提高了多普勒信号的强度与信噪比。

A low complexity detection scheme for the MIMO system with distributed transmit antennas is presented. Based on a Sorted CHolesky Decomposition, the additive gaussian color noise after match filter is whitened; The detection sequence according to the post signal noise ratio is reordered, and the risk of error propagation is degraded. The whole algorithm only requires one matrix inverse.

摘要针对发射天线分布的MIMO信号，基于排序的乔列斯基分解过程(Sorted CHolesky Decomposition，SCHD)，将匹配滤波后的加性高斯色噪声转化成加性高斯白噪声，根据后验信噪比对发射信号检测顺序进行重排，降低了误差传播的影响，该算法仅需一次矩阵求逆操作。

The results show that the signal noise ratio of MFL signal was improved significantly.

结果表明，采用归一化最小均方自适应滤波方法可使缺陷漏磁信号的信噪比得到显著的提高。

The result shows it reduces sawtooth of the image edge while keeps the compress ratio and signal/noise ratio.

通过试验结果可知，该模型在保证一定压缩比和信噪比的同时，减小了图像边缘的锯齿。

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。