论文部分内容阅读
为提高光学码分多址(CDMA)单用户的安全性,提出了基于单个偏振调制器(PolM)实现光码移键控(CSK)信号产生的方案,阐述了其工作原理并进行了仿真和实验验证。仿真结果表明,采用平衡检测器的CSK系统接收机灵敏度较开关键控(OOK)系统高4.1dBm;实验结果表明,采用单端接收的CSK系统最低误码率(BER)为1.15×10-8,引入光阈值器件后系统BER降低到4.02×10-11,即实现了背靠背无误码传输。基于速率级能量检测的窃听实验表明,CSK系统可以抵抗速率级能量检测的窃听者。
In order to improve the security of single user of optical code division multiple access (CDMA), a scheme of realizing optical code shift keying (CSK) signal generation based on a single polarization modulator (PolM) is proposed. Its working principle is described and simulated. Experimental verification. The simulation results show that the sensitivity of CSK receiver with balanced detector is 4.1dBm higher than that of open keying (OOK) system. The experimental results show that the minimum bit error rate (BER) of CSK system using single-ended receive is 1.15 × 10-8 , The system BER is reduced to 4.02 × 10-11 after the light threshold device is introduced, that is, the back-to-back error-free transmission is realized. Eavesdrop experiments based on rate-level energy detection show that the CSK system can resist eavesdroppers at rate-level energy detection.