喷泉码的遥测抗闪断技术应用研究

Application of Fountain Coding in Telemetry System

喷泉码具有恢复闪断数据的能力,可以有效改善火箭导弹遥测系统可能出现的接收信号起伏大、甚至闪断的问题。本文提出了一种喷泉码级联技术的物理层应用方案,重点研究了喷泉码与TPC级联过程中的关键技术问题,分析了系统的误码和丢帧性能,并进行了原理样机的试验验证。实测数据表明,在信道闪断概率低于10%的条件下,采用LT+TPC级联编码的PCM-FM遥测系统,其数据恢复能力可提高至99.5%以上。

Fountain coding can resume the distributed data,and can improve the fluctuated signal reception accrued in Launcher and Missile telemetry system.A scheme of Concatenated Fountain Code and Turbo Product Code（TPC） is proposed,some key issues during Concatenation are emphasized,and performance of Bit Error Rate and Frame Lost Rate are discussed by using the baseband equipment test.As the test results indicated,the PCM-FM Telemetry System with LT＋TPC Concatenated Code can improve the data reception up to 99.5% in the case of erase probability below 10%.