行星际网络中AR4JA码性能分析  

Performance Analysis of AR4JA Code in IPN Network

作　　者：李慧[1] 杨明川[1] 李明[1] 吕谷[1] 郭庆[1] 

机构地区：[1]哈尔滨工业大学通信技术研究所,黑龙江哈尔滨150080

出　　处：《通信技术》2012年第9期1-3,6,共4页Communications Technology

基　　金：国家自然科学基金项目(批准号:61101126);国家自然科学基金重点项目(批准号:61032003)

摘　　要：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。For an in-depth analysis on the performance of AR4JA code in IPN network, the theoretical analysis on the structure property and performance of AR4JA code is done first, and with BP decoding algorithm and min-sum decoding algorithm, the decoding of AR4JA code also implemented. Analysis indicates that AR4JA code has several advantages such as easy and systematic encoding, higher code rate by punching, and linear relationship between the increase of between-code minimum distance and code length, and thus is quite suitable for application in IPN network. Meanwhile the simulation results also show that both decoding algorithms are applicable for AR4JA code in INPnetwork. Relative to BP decoding algorithm, min-sum decoding algorithm could cause little gain loss while reducing computing complexity, and so could fairly meet the need of IPN network detector miniaturization.

关 键 词：行星际网络 AR4JA码 BP译码算法 最小和译码算法 

分 类 号：TN927.3[电子电信—通信与信息系统]