Performance Comparison of Modulation Schemes for Atmospheric Optical Communication
-
摘要: 为选择适合大气激光通信的信道调制方式,对湍流信道下的大气激光通信系统中的OOK,PPM,DPPM和DPIM调制方式的包误码率(PER)和带宽性能进行了仿真分析.结果表明,DPIM的PER性能最好,PPM和DPPM次之,OOK最差.当调制参数较小时,PPM的带宽性能较好;当调制参数较大时,DPPM和DPIM的带宽性能较好.除OOK之外的3种调制方式需要的功率都较小.Abstract: The performances of modulation schemes,OOK(on off key),PPM(pulse position modulation),DPPM(differential pulse position modulation) and DPIM(digital pulse interval modulation),used in optical communication over the atmospheric turbulence channel were analyzed and compared in terms of packet error rate(PER) and bandwidth efficiency.In terms of PER,DPIM is the best followed by PPM and DPPM,and OOK is the worst.With regard to bandwidth efficiency,PPM is desirable with a small modulation parameter,and DPPM and DPIM are good with a large modulation parameter.All these schemes,except OOK,require a small laser power.
-
Key words:
- atmospheric optical communication /
- OOK /
- PPM /
- DPPM /
- DPIM /
- performance
-
ZHANG Jionglong.Modulation analysis for outdoors applications of optical wireless communications[J].IEEE Transactions on Communication,2000,32(7):1 483-1 487.[2] 马慧萍.移动大气激光通信中的光调制解调技术研究[D].国防科技大学研究生院,2003.[3] 庞志勇,朴大志,邹传云.光通信中几种调制方式的比较[J].桂林电子工业学院学报,2002,22(5):1-4.PANG Zhiyong,PIAO Dazhi,ZOU Chuanyun.Performance comparisons of several modulation schemes for optical wireless communication[J].Journal of Guilin Institute of Electronic Technology,2002,22 (5):1-4.[4] 汪井源,张正线.无线光通信中的PPM调制[J].电讯技术,2000(5):81-84.WANG Jingyuan,ZHANG Zhengxian.PPM in wireless infrared communication[J].Telecommunication Technologies,2000(5):81-84.[5] ZHU Xiaoming,KAHN J M.Free-space optical communication through atmospheric turbulence channels[J].IEEE Transactions on Communication,2002,50 (8):1 293-1 300.[6] GAGLIARDI R M,KARP S.Optical telecommunications[M].New York:Wiley,1998.
点击查看大图
计量
- 文章访问数: 1404
- HTML全文浏览量: 72
- PDF下载量: 523
- 被引次数: 0