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为了深入研究AR4JA码在行星际网络中的性能,对AR4JA码的构造特点及性能进行系统的理论分析,并使用BP译码算法和最小和译码算法对AR4JA码进行译码。分析发现,AR4JA码具有编码简单并呈现系统性,通过打孔提高码率,码间最小距离的增加与码长成线性关系等优势,非常适合在行星际网络中应用。同时实验结果表明,两种译码算法均适用于在行星际网络中使用的AR4JA码。在此情况下,相对BP译码算法,最小和译码算法在损失较小增益的同时减少译码复杂度,更便于行星际网络探测器小型化需求。
In order to further study the performance of AR4JA code in inter-satellite network, the structural characteristics and performance of AR4JA code are systematically analyzed. The AR4JA code is decoded by using BP decoding algorithm and minimum and decoding algorithm. The analysis shows that the AR4JA code has the advantages of simple coding and systematic presentation, improved code rate through puncturing, and the increase of the minimum distance between codes is linear with the code length, which is very suitable for application in the inter-satellite network. The experimental results show that both decoding algorithms are suitable for the AR4JA code used in interplanetary networks. In this case, compared with the BP decoding algorithm, the minimum and the decoding algorithms reduce the decoding complexity while reducing the gain, and are more convenient for the miniaturization of the inter-satellite network detector.