In modern shortwave communication systems, the channels are mostly frequency-selective, multipath transmission causes the coherent attenuation and symbol interference.
现代短波通信系统，其信道大多数具有频率的选择性，多径传输产生了信号的相干衰落与符号干扰。
2
The spectrum transmission function (STF) of optic fiber ring is obtained with the theory of partially coherent light.
根据部分相干光理论， 得到了光纤环光谱传递函数。
3
To realize optical image transmission with long relay distance, image transmission through linear array coherent optical fiber bundle with wavelength encoding is introduced.