| 基于希尔伯特变换的多用户DCSK通信系统性能分析 |
| |
| 引用本文： | 张刚,许嘉平,张天骐.基于希尔伯特变换的多用户DCSK通信系统性能分析[J].电子与信息学报,2018,40(11):2744-2751. |
| |
| 作者姓名： | 张刚 许嘉平 张天骐 |
| |
| 基金项目： | 国家自然科学基金(61771085, 61371164)，信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003)，重庆市教育委员会科研项目(KJ1600429) |
| |
| 摘 要： | 针对差分混沌移位键控(DCSK)传输速率低的问题，该文提出一种基于希尔伯特变换的多用户DCSK(HMU-DCSK)通信系统。在固定阶数的Walsh码条件下，通过希尔伯特变换将正交基信号集合提高1倍，并确保分配给每个用户的载波信号正交。推导了在Rayleigh衰落信道下的误码率公式并进行仿真。结果表明，相同N值下HMU-DCSK系统的传输速率是传统多用户DCSK系统的2倍；相同传输速率下HMU-DCSK系统的误码性能明显优于传统多用户DCSK系统。
|
| 关 键 词： | 混沌通信 多用户 Walsh码 希尔伯特变换 传输速率 |
| 收稿时间： | 2018-01-25 |
Performance Analyze for Multiuser-DCSK Communication System Based on Hilbert Transform |
| |
| Gang ZHANG,Jiaping XU,Tianqi ZHANG.Performance Analyze for Multiuser-DCSK Communication System Based on Hilbert Transform[J].Journal of Electronics & Information Technology,2018,40(11):2744-2751. |
| |
| Authors: | Gang ZHANG Jiaping XU Tianqi ZHANG |
| |
| Affiliation: | Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
| |
| Abstract: | A multiuser Differential Chaos Shift Keying (DCSK) communication system based on Hilbert transform is proposed (HMU-DCSK), to solve the problem of low transmission rate of DCSK. Under the condition of fixed-order Walsh codes, the set of orthogonally-based signals is doubled by the Hilbert transform and the carrier signals assigned to each user are guaranteed to be orthogonal. The Bit-Error-Rate (BER) formula in Rayleigh fading channel is derived and numerous simulations are conducted. The simulation results show that the transmission rate of HMU-DCSK system is twice that of traditional multiuser DCSK system under the same N value, meanwhile, the BER performance of HMU-DCSK system is obviously better than the traditional multi-user DCSK system under the same transmission rate. |
| |
| Keywords: | |
|
| 点击此处可从《电子与信息学报》浏览原始摘要信息 |
|
点击此处可从《电子与信息学报》下载全文 |
