基于低截获率的CDL信息传输方案  

A scheme for data transmission of CDL based on low probability of intercept

作　　者：李思佳[1] 毛玉泉[1] 林永照[1] 吴崇虎[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《电子技术应用》2012年第3期102-105,109,共5页Application of Electronic Technique

基　　金：国家863计划创新基金资助项目(2010AAJ145);陕西省电子信息系统综合集成重点实验室基金项目(201102Y05);空军工程大学研究生创新基金(20110301);空军工程大学电讯工程学院科研创新项目(DYCX1040)

摘　　要：为实现通用数据链低截获率的信息传输目标,在分析比较了三种混沌扩频序列映射的基础上,提出了一种结合信道编码和混沌扩频序列的通用数据链低截获率方案。信道编码部分,使用边逐步增加算法生成校验矩阵,采用近似下三角算法完成了QC-LDPC的编码;扩频序列部分,完成了三种混沌扩频序列的理论分析,仿真比较了Bernoulli、改进型Logistic、Tent三种映射的混沌扩频序列性能;最后仿真验证了方案的正确性。A cooperated anti-jamming scheme of common data link （CDL） is proposed based on QC-LDPC and chaotic direct sequence spread spectrum for transmitting the data in the low probability of intercept. Firstly, the QC-LDPC encode is completed through the progressive-edge growth based on the parity check matrix. The progressive-edge growth is introduced for constructing the parity check matrix and the Eichardson-Urbanke method are used for designing QC-LDPC codes. Secondly, the performance of chaotic spread spectrum sequences, produced from the Bernoulli, Logistic, and Tent MAP, is analyzed and compared through the three-dimensional phasic space method. At last the scheme is approved from simulation.

关 键 词：低截获率 QC-LDPC 混沌扩频序列 通用数据链(CDL) 直接序列扩频 

分 类 号：TN911.72[电子电信—通信与信息系统]