A new blind frequency offset estimation method based on cyclic prefix and virtual subcarriers in coherent optical orthogonal frequency division multiplexing (CO-OFDM) system is presented.
在相干光正交频分复用系统中，本文提出了一种新型的基于循环前缀和虚载波的盲频偏估计方法。
2
With the help of the orthogonal experimentation we analyse the academic number of the Pre-freezing and sublimation-drying time, measure co-crystal temperature and the drying time.
通过正交试验对预冻时间和升华干燥时间进行了分析，测量了黄瓜的共晶点温度和干燥时间。
3
Rice moisture content, film of different kinds and co 2 content were measured, the orthogonal test of rice storage with film packing was carried out, and its variance was analysed.