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为了克服大气湍流对自由空间光通信(FSO)链路的影响,将LT码应用到FSO系统中,并结合基于部分信息LT码的修正转移鲁棒孤子分布(ISRSD),模拟了不同大气湍流强度信道,采用不同的编码方案进行模拟比较,结果表明:与RS码相比,误码率为10~(-4)时,LT码获得大约2dB的编码增益;相比于RSD,ISRSD能使译码开销降低1%~2%,且LT码采用ISRSD后,误码率为10~(-7)时,系统获得0.2~0.5dB的编码增益。
In order to overcome the influence of atmospheric turbulence on the free space optical communication (FSO) link, the LT code is applied to the FSO system. Combined with the modified transfer robust soliton distribution (ISRSD) based on partial information LT code, Channel, using different coding schemes to simulate and compare. The results show that compared with the RS code, the LT code achieves about 2dB coding gain when the bit error rate is 10 ~ (-4). Compared with RSD, ISRSD can make the translation The code cost is reduced by 1% ~ 2%. After the IS code is used in the LT code, the system gains 0.2 ~ 0.5dB coding gain when the bit error rate is 10 ~ (-7).