CAJ | 학술논문

随着宽带通信服务的日益增加，用于无线通信网络的载波频率更高才能满足带宽的需求。光纤无线电系统由于光纤的低传输损耗和超宽带的特点被用于宽带无线接入系统。利用光学的方法产生高频载波是光纤无线电系统中的关键技术之一。在光纤无线电系统中利用光纤布拉格光栅从可调谐激光器中反射出两束相位近似相等的相干光，利用光外差的原理经过光电探测器接收之后产生的毫米波信号，降低了相位噪声对产生的毫米波信号的影响。通过仿真发现在带通滤波器的输出端产生了频率为两束相干光频率差60GHz的毫米波信号，分析了随着光纤的长度增加，毫米波信号的变化情况。
수착관대통신복무적일익증가，용우무선통신망락적재파빈솔경고재능만족대관적수구。광섬무선전계통유우광섬적저전수손모화초관대적특점피용우관대무선접입계통。이용광학적방법산생고빈재파시광섬무선전계통중적관건기술지일。재광섬무선전계통중이용광섬포랍격광책종가조해격광기중반사출량속상위근사상등적상간광，이용광외차적원리경과광전탐측기접수지후산생적호미파신호，강저료상위조성대산생적호미파신호적영향。통과방진발현재대통려파기적수출단산생료빈솔위량속상간광빈솔차60GHz적호미파신호，분석료수착광섬적장도증가，호미파신호적변화정황。
As the demand for broadband communication increases ,higher carrier frequencies in wireless networks are utilised to accommodate the bandwidth requirement .The radio over fibre (RoF) system is a promising technology for broadband wireless access applications because of the many advantages of the optical fibre ,including low transmission loss and ultra -wide bandwidth .Two beam phase approximately equal coherent light are reflected from the tunable laser by the fiber bragg grating ,the 60GHz millimeter wave signal is produced by photoelectric detector with the principle of optical heterodyne and the phase noise is reduced . The receiving millimeter wave signal changes are analyzed with optical fiber transmission distance change .