基于APD的Turbo码编码PPM差错性能分析  

Error Performance Analysis of Turbo Coded PPM Based on APD

作　　者：王红星[1] 朱银兵[1] 王贞俭[1] 张铁英[1] 

机构地区：[1]海军航空工程学院,山东烟台264001

出　　处：《弹箭与制导学报》2007年第3期219-222,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：在推导了未编码256-ray PPM的符号差错率相对平均发射功率的关系式之后,仿真分析了Turbo码编码PPM与未编码PPM的符号差错率以及850nm和1550nm两种波长激光的符号差错率.分析比较结果表明,未编码时,在相同符号差错率下,波长为1550nm的激光相对850nm激光可节约平均发射功率约3dB;引入Turbo码编码,对同一波长激光,在给定交织长度下相对未编码时可获得3～4dB的编码增益.After the derivation of the formula of symbol error rate versus average transmitted power for uncoded 256-ray PPM, the symbol error rate of Turbo coded PPM and uncoded PPM are simulated and analyzed, and also that of laser with two different wavelengths. The results show that laser with 1550nm can save 3dB average transmitted power relative to that with 850nm under the same symbol error rate when encoding techniques are not introduced, and that a code gain of 3-4dB can be acquired for the same wavelength on the given interleaving length because of the introduction of Turbo code.

关 键 词：无线光通信 TURBO码 符号差错率 

分 类 号：TN929.12[电子电信—通信与信息系统]