提示：点击例句中的单词，就可以看到词义解释

A calcuation method of the upstream CNR was given .

文中针对上行通道的CNR给出了计算方法。

OBI noise drastically reduces CNR of each channel and seriously degrades the system performance , therefore must be suppressed .

光拍频干扰噪声大大地降低了单信道的载噪比，严重地劣化了系统的性能，因而必须加以抑制。

CNR Analysis of CDMA used in Fiber to the Railway

CDMA在FTTR中应用的载噪比分析

CSR and CNR have been the primary suppliers of railway engines and cars to China ’ s high-speed rail network .

南车和北车是中国高速铁路网的主要铁路机车供应商。

In the condition of large CNR , this method is equivalent to the optimal filtering under the maximal SIR criterion .

在大杂噪比条件下，该方法等效于最大信干比准则下的最佳滤波。