光信 meaning in English
mitsunobu
Examples
- Optical signal to noise ratio
光信噪比 - This chapter discusses two models of optical information channel of holographic system : intensity model and amplitude model , and discusses some methods overcoming noises by use of these two models . s . encypting holographic data storage based on orthogonal - phase - code multiplexing
详细讲述了光信道的两种模型：光强度模型和光幅度模型，并利用这两种模型讨论了克服噪声的一些措施； 3 .正交相位编码全息光存储。 - This chapter introduces the basic configuration and basic principle of optical holographic storage system , and discusses the primary reasons that affect the fidelity of the data , puts forward some methods overcoming noise . 2 . optical information channel of holographic storage system
介绍光全息存储系统的基本结构和基本原理，分析了影响系统的一些主要噪声，并提供了克服这些噪声的方法； 2 .全息光存储系统光信道模型。 - Secondly , we simulate the transmission process in computer , calculate the optical - signal - to - noise - ratio ( osnr ) of output signal with the same input signal filtered by the ofbg , matched filter and f - p filter , analyze the improvement of the osnr after filtered by them . we find it also has advantage over f - p filter . taking the two reasons into account , we believe that the weak ofbg is superior to the widely used f - p filter
另外用计算机模拟计算了光信噪比的改善情况，研究发现：一个相同的噪声信号经弱ofbg后的光信噪比较经过f - p滤波器后的光信噪比高，由此认为， ofbg用作光滤波器对接收端前置光放大器的噪声进行滤波，比常用f - p光滤波器具有更大的优越性。 - The chapter of theoretical analysis and modeling includes baseband signal , coding , modulation , as well as optical electric transform , demodulation , decoding , the recovery of baseband signal . according to the request of the whole system , we have studied three possible schemes for long wavelength and short wavelength , finished correlative analysis and comparison , and presented the conclusion
理论分析和建模部分则分析了包括光发射、光信道、光接收在内的整个通信链路，研究了包括基带信号、编码、激光调制到光电变换、解调、解码、恢复基带信号等空间光链路发、收传输的整个过程，提出了系统的模型。