| 摘要: |
| 在相关延迟键控(CDSK)和混沌开关键控(COOK)这两种传统方案的基础上提出了一种新型的混沌键控方案——正交相关延迟混沌开关键控(OCD-COOK)。该方案结合了CDSK系统和COOK系统各自的特点，同时引入了一对简单的Walsh码序列，克服了CDSK系统误码性能差的缺点，具有比特误码率低、传输速率高、安全性好等优势。理论分析及仿真结果均表明，该系统的比特误码率低于CDSK和差分混沌键控(DCSK)，传输速率是DCSK的2倍，具有很好的实际应用价值。 |
| 关键词: 混沌通信 正交相关延迟混沌开关键控 Walsh码 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目(61771085,61371164);重庆市教育委员会科研项目(KJ1600429) |
|
| A novel orthogonal correlation delay chaos on-off keying system |
| ZHANG Gang,XU Lianbing,ZHANG Tianqi |
| (Chongqing Key Laboratory of Signal and Information Processing,Chongqing University of Posts and Telecommunications,Chongqing 400065,China) |
| Abstract: |
| Based on traditional scheme of Correlation Delay Shift Keying(CDSK) and Chaos On-Off Keying(COOK)，a novel chaotic shift keying scheme,or Orthogonal Correlation Delay Chaos On-Off Keying(OCD-COOK)，is proposed.The scheme combines CDSK and COOK's characteristics and introduce a pair of simple Walsh codes sequences to overcome the disadvantages of bad bit error rate(BER) performance in CDSK.It shows the advantages of low BER,high transmission rate and good communication security and so on.Theoretical analysis and simulation results show that the BER of this system is always lower than that of CDSK and Differential Chaos Shift Keying(DCSK) and the transmission rate is twice of DCSK,which indicates its good practical application feasibility. |
| Key words: chaos communication orthogonal correlation delay chaos on-off keying(OCD-COOK) Walsh code |
《电讯技术》编辑部 