摘要
针对卫星通信中数据安全传输与准确恢复的需求,文中设计一种基于哈达玛矩阵的星载混沌通信扩频算法。为了克服复杂的信道环境对扩频算法的挑战,将混沌通信理论应用于卫星通信系统中,使用混沌扩频序列代替PN伪随机序列进行调制。同时为了提高实用性与降低误码率,文中采用哈达玛矩阵构造混沌扩频序列,并利用哈达玛矩阵的列正交性减少判决干扰项。仿真验证与数据分析的结果表明,所提算法在不同的信噪比环境下,误码率性能均优于现有的其他算法,且序列长度越短所提算法误码率性能越优。
In allusion to the requirements of data security transmission and accurate recovery in satellite communications,a satellite-based chaos communication spread spectrum algorithm based on Hadamard matrix is designed.In order to overcome the challenge of complex channel environment to spread spectrum algorithm,chaos communication theory is applied to the satellite communication system,by which the chaos spread spectrum sequence is used to instead of PN pseudo-random sequence for modulation.The Hadamard matrix is used to construct chaotic spread spectrum sequence to improve the practicability and reduce the bit error rate,and the decision interference is reduced by means of the column orthogonality of Hadamard matrix.The simulation verification and data analysis show that the bit error rate performance of the proposed algorithm is better than that of other existing algorithms in different signal to noise ratio environments,and the shorter the sequence length,but the better the bit error rate performance of the proposed algorithm.
作者
程珺炜
刘春玲
张然
CHENG Junwei;LIU Chunling;ZHANG Ran(School of Information Engineering,Dalian University,Dalian 116622,China)
出处
《现代电子技术》
北大核心
2020年第22期72-74,共3页
Modern Electronics Technique
基金
装备发展部领域基金一般项目(61405180402)
辽宁省自然科学基金指导计划项目(2019-ZD-0311)。
关键词
混沌通信
扩频算法
哈达玛矩阵
卫星通信
混沌扩频序列
仿真验证
chaotic communication
spread spectrum algorithm
Hadamard matrix
satellite communication
chaotic spread spectrum sequence
simulation verification
作者简介
程珺炜(1992-),男,江苏无锡人,硕士研究生,研究方向为通信抗干扰技术;刘春玲(1971-),女,辽宁营口人,博士,硕士生导师,教授,研究方向为卫星通信、信号处理等。
