一种改进的DCSK保密图像传输方案

贺利芳; 张刚; 张天骐

doi:10.3969/j.issn.1000-0801.2013.06.014

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一种改进的DCSK保密图像传输方案

研究与开发 | 更新时间：2024-06-05

- 一种改进的DCSK保密图像传输方案
- A Secure Image Transmission Scheme Based on Improved DCSK
- 电信科学 2013年29卷第6期页码：94-99
- 作者机构：
- 作者简介：
  
  [ "贺利芳，女，硕士，重庆邮电大学副教授，主要研究方向为混沌同步、混沌保密通信等。" ]
  [ "张刚，男，博士，重庆邮电大学副教授，主要研究方向为混沌同步、混沌保密通信等。" ]
  [ "张天骐，男，博士后，重庆邮电大学、教授，信号与信息处理重庆市重点实验室主任，主要研究方向为宽带微弱无线电信号处理、盲信号检测与信息处理、无线通信的智能信号处理等。" ]
- 基金信息：
  
  国家自然科学基金资助项目;The National Natural Science Foundation of China(61071196);国家自然科学基金资助项目;The National Natural Science Foundation of China(61102131);教育部新世纪优秀人才支持计划基金资助项目;The Program for New Century Excellent Talents in University(NCET-10-0927);信号与信息处理重庆市市级重点实验室建设基金资助项目;The Project of Key Laboratory of Signal and Information Processing of Chongqing(CSTC2009CA2003);重庆市杰出青年基金资助项目;The Chongqing Distinguished Youth Foundation(CSTC2011jjjq40002);重庆市自然科学基金资助项目;The Natural Science Foundation of Chongqing(CSTC2010BB2398);重庆市自然科学基金资助项目;The Natural Science Foundation of Chongqing(CSTC2010BB2409);重庆市自然科学基金资助项目;The Natural Science Foundation of Chongqing(CSTC2010BB2411);重庆市自然科学基金资助项目;The Natural Science Foundation of Chongqing(CSTC2012JJA40008);重庆市教育委员会科研基金资助项目;The Research Project of Chongqing Educational Commission(KJ130524);重庆市教育委员会科研基金资助项目;The Research Project of Chongqing Educational Commission(KJ120525);国家留学基金资助项目
- DOI：10.3969/j.issn.1000-0801.2013.06.014
  中图分类号：
- 网络出版日期：2013-06，
  
  纸质出版日期：2013-06-20
- 稿件说明：
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贺利芳, 张刚, 张天骐. 一种改进的DCSK保密图像传输方案[J]. 电信科学, 2013,29(6):94-99.

Lifang He, Gang Zhang, Tianqi Zhang. A Secure Image Transmission Scheme Based on Improved DCSK[J]. Telecommunications science, 2013, 29(6): 94-99.
贺利芳, 张刚, 张天骐. 一种改进的DCSK保密图像传输方案[J]. 电信科学, 2013,29(6):94-99. DOI： 10.3969/j.issn.1000-0801.2013.06.014.

Lifang He, Gang Zhang, Tianqi Zhang. A Secure Image Transmission Scheme Based on Improved DCSK[J]. Telecommunications science, 2013, 29(6): 94-99. DOI： 10.3969/j.issn.1000-0801.2013.06.014.

摘要

差分混沌键控（DCSK）采用非相干解调技术，不必在接收端生成混沌同步信号，结构简单，并具有很好的抗噪性能，但保密性不足，较易破解。针对DCSK保密性差的问题，提出了一种改进的DCSK方案，在保证其性能的同时大大提高保密性。且对此系统进行了深入的理论分析，对误码率、扩频系数和信噪比之间的关系进行了深入研究，并将其运用到图像保密传输中，通过仿真验证该方案的可行性。仿真结果表明，改进的DCSK系统在误码性能和保密性上都较原系统有极大提高，因此对实际应用具有重大意义。

Abstract

Non-coherent demodulation technology is applied in the differential chaos shift keying（DCSK）and it's unnecessary for the receiver to generate chaotic synchronous signals at the receiving end. The structure in DCSK is simple and has good performance in anti-noise. However

it is lack of performance in security

and easier to be cracked. A modified DCSK scheme was proposed for the security problems caused by the traditional DCSK scheme. It retains the good performance of the old one and greatly increases security performance at the same time. The theoretical analysis toward the system was deeply carried out. The relationship among the BER

the frequency spread factor and SNR were also deeply analyzed. Finally

it was applied in an image transmission system as an example. The simulation results indicate that the performance of the bit error ratio（BER）and security are greatly improved. The feasibility was also proved by simulations.

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Keywords

references

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