CAJ | 학술논문

LT码是喷泉码的一种，由于其优异的性能得到了广泛的应用，其中，分布式LT码在有中继传输的深空通信中特别适用，但是它必须满足各个信源发送的数据信息包长度相等，在实际通信中，每个中继传输的信息数据量不一定相等，数据重要程度也会有所不同，本文针对这个问题设计出了分布式不等差错保护LT码，在编码时通过对信源包的选择策略进行调整实现对重要数据的保护，仿真结果证实了我们提出策略的有效性。
LT마시분천마적일충，유우기우이적성능득도료엄범적응용，기중，분포식LT마재유중계전수적심공통신중특별괄용，단시타필수만족각개신원발송적수거신식포장도상등，재실제통신중，매개중계전수적신식수거량불일정상등，수거중요정도야회유소불동，본문침대저개문제설계출료분포식불등차착보호LT마，재편마시통과대신원포적선택책략진행조정실현대중요수거적보호，방진결과증실료아문제출책략적유효성。
LT code,as one of the fountain codes,is now widely used for its excellent performance. Distribu-ted LT code is particular suitable for the deep-space communication with relay transmission, however it must meet the requirement of equal length for data packets of each source. Under actual circumstance, the information data size of each relay transmission differs whereas the importance of data is not the same as well. In the light of this,the distributed unequal error protection LT code is proposed,which could achieve the protection of important data through adjusting the source packet selection strategy in the encoding. Sim-ulation results indicate the effectiveness of this strategy.