摘要
为了进一步改善传统FSO-OFDM系统的通信性能,文中将LT码应用于该系统。介绍了LT码和交织原理。给出了FSO-OFDM信道模型,以计算不同湍流环境下光强闪烁对系统性能的影响。在不同大气湍流信道环境下,对RS码和LT码的性能分别进行了模拟实验仿真,结果表明:在不同大气湍流环境下,采用LT码的FSO-OFDM系统性能有较大的提升;在强湍流环境下,FSO-OFDM系统在引用LT码与交织后,其性能更优越。
In order to improve the communication performance of the traditional FSO-OFDM system, the LT code is applied to the system. The principle of LT code and interweaving is introduced. The FSO-OFDM channel model is given to calculate the effect of light intensity scintillation on the system performance under different turbulent environment. The performance of RS codes and LT codes are simulated in different atmo- spheric turbulent channel environment, and the result shows that the performance of FSO-OFDM system with LT code has a great improvement in different turbulent environment, and in the strong turbulent environment, FSO-OFDM system is more superior to LT code and interweaving.
出处
《光通信技术》
北大核心
2016年第11期51-53,共3页
Optical Communication Technology
基金
国家自然科学基金青年项目(61205106)资助
博士后科学基金(2014M552329)资助
重庆市教委基金(KJ120827)资助
重庆市教委科学技术项目(KJ1500934)资助
