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基于喷泉码的前向纠删编码方法能够解决深空信道长时延、高误码率及链路易中断等特殊环境下的可靠数据传输问题。该方法同时采用系统Raptor码和Turbo码作为应用层与物理层编码方案,利用喷泉码的无率和一致特性克服了ARQ机制在深空通信应用中的瓶颈。仿真结果表明:该方法可以在无需反馈信道的情况下为系统提供误帧率保证(10-4～10-5),同时,相比于单纯使用Turbo码的方案,该方法在一定程度上提高了系统频带利用率。
The forward erasure coding method based on fountain code can solve the problem of reliable data transmission under special circumstances such as long time delay of deep space channel, high bit error rate and easy link interruption. The method uses both system Raptor code and Turbo code as the application layer and physical layer coding scheme, and overcomes the bottleneck of ARQ mechanism in deep space communication by utilizing the rateless and consistent features of fountain code. The simulation results show that this method can provide the frame error rate guarantee (10-4 ~ 10-5) without feedback channel, and at the same time, the method improves to a certain extent compared with the scheme using Turbo code The system bandwidth utilization.