Evaluation and Implementation of Parallel Optical Wireless Communication System for Shifting of Optical Axis

在本研究中，我通过使用光零相关区（ZCZ）码的光码分多址（OCDMA）系统的数据复用传输实验，验证了该系统可以抑制同信道干扰和光轴移位干扰，该系统被称为光ZCZ- cdma系统，该系统由一个红外发光二极管（LED）、一个雪崩光电二极管（APD）模块和现场可编程门阵列（FPGA）板组成，对应40万个逻辑门。数据传输实验结果表明，光ZCZ-CDMA系统可以抑制同信道干扰，但不能完全消除同信道干扰，并且光轴移位的干扰被抑制在-30 ~ 30度左右。

In this research, I verified that this system can suppress co-channel interference and interference by shifting of optical axis by data multiplex transmission experiment of optical code division multiple access(OCDMA) system using optical zero-correlation zone(ZCZ) codes which is called optical ZCZ-CDMA system, consisting of a infrared light emitting diode(LED), an avalanche photo diode(APD) module and field programmable gate array(FPGA) boards corresponding to 400,000 logic gates. As a result of data transmission experiment, optical ZCZ-CDMA system can suppress co-channel interference, but can' t remove completely co-channel interference, and interference by shifting of optical axis is suppressed from about-30 to 30 degrees.