摘要
目前无线光通信工程主要采用开关键控调制,该调制简单、易实现,但误码率高,需要引入纠错编码技术。在分析Turbo码译码结构和开关键控迭代译码算法的基础上,分析仿真了迭代次数、帧长以及约束长度对开关键控调制误码率的影响。结果表明,引入Turbo码编译码技术能够有效改善无线光开关键控调制系统的误码性能。
On-off keying （OOK） is the main modulation method used in the present optical communication engineering, simple and easy to implement. But its bit error rate is so high that error correcting coding techniques are necessary, After analysis of Turbo decoder and coding algorithm for OOK, the effects of the number of iterations, frame size and restriction length on the bit error rate are analyzed and simulated. The results show that bit error rate of QOK modulation system can be improved greatly by Turbo code.
出处
《激光与光电子学进展》
CSCD
北大核心
2007年第1期69-72,共4页
Laser & Optoelectronics Progress
关键词
无线光通信
开关键控
TURBO码
误码率
optical wireless communication
on-off keying
Turbo code
bit error rate
