空间辐射环境对卫星光通信系统误码率的影响

摘要

为了提高卫星光通信系统的空间抗辐射性能,开展了空间辐射损伤对卫星光通信系统的误码率影响研究.建立了空间辐射损伤的误码率模型,并基于该模型对光源和光电探测器辐射损伤条件下的系统误码率进行了数值计算.结果表明γ射线辐射和质子辐射均能对通信系统误码率造成几个量级的下降,需要增加合理的空间辐射屏蔽单元或者选择空间抗辐射性能较高的零差BPSK工作模式.%To improve the space anti-radiation performance of the optical satellite communication system,the research on the space radiation environment's influence on system bit error ratio( BER) is carried out. The radiation-induced BER model is established,based on which the BER numerical calculations after the radiation damage of either optical source or optical detector are developed. The calculation results have proven that both y radiation and proton radiation can degrade the system BER by several order of magnitude. It points out that some suitable radiation shielding measures or homodyne BPSK mode are needed.