MIMO模型下的多元混合调制DCSK方案

doi:10.12305/j.issn.1001-506X.2021.07.31

系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (7): 1989-1994.doi: 10.12305/j.issn.1001-506X.2021.07.31

MIMO模型下的多元混合调制DCSK方案

陈晓婷^1,^2,*, 王年¹, 丁大为¹, 张公泉¹, 卢宇²

1. 安徽大学电子信息工程学院, 安徽合肥 230601
2. 合肥师范学院电子信息系统仿真设计安徽省重点实验室, 安徽合肥 230601

收稿日期:2020-09-14 出版日期:2021-06-30 发布日期:2021-07-08
通讯作者: 陈晓婷
作者简介:陈晓婷(1987—), 女, 讲师, 博士研究生, 主要研究方向为智能信息处理|王年(1961—), 男, 教授, 博士研究生导师, 博士，主要研究方向为智能信息处理、计算机视觉|丁大为(1977—), 男, 教授, 硕士研究生导师, 博士，主要研究方向为无线通信网、复杂网络|张公泉(1990—), 男, 博士研究生, 主要研究方向为混沌通信、保密通信|卢宇(1979—), 男, 讲师，博士后, 主要研究方向为机器视觉、信息处理
基金资助:
国家自然科学基金青年科学基金(61501002);电子信息系统仿真设计安徽省重点实验室开放基金(合肥师范学院)(2020ZDSYSYB07)

M-ary hybrid modulation DCSK scheme in MIMO model

Xiaoting CHEN^1,^2,*, Nian WANG¹, Dawei DING¹, Gongquan ZHANG¹, Yu LU²

1. College of Electronic Information Engineering, Anhui University, Hefei 230601, China
2. Anhui Province Key Laboratory of Simulation and Design for Electronic Information System, Hefei Normal University, Hefei 230601, China

Received:2020-09-14 Online:2021-06-30 Published:2021-07-08
Contact: Xiaoting CHEN

摘要/Abstract

摘要：

为了提升多输入多输出差分混沌移位键控(multiple input multiple output difference chaotic shift keying, MIMO-DCSK)系统的误码性能, 提出一种多元混合调制MIMO-DCSK方案(M-ary hybrid modulation MIMO-DCSK, MHM-MIMO-DCSK)。首先，将一帧的多元信息拆分, 分别通过混沌扩频码和索引码进行调制, 以实现高效的传输。其次，接收端利用混沌序列的类正交特性消除多天线干扰和多路干扰。最后将多天线的相关运算结果等增益合并, 最终在不需要信道状态信息的前提下获取多径多输入多输出系统的全分集增益。仿真结果表明，所提MHM-MIMO-DCSK比现有的多元MIMO-DCSK拥有更好的误码性能, 尤其是在高阶调制情况下性能提升更明显。

关键词: 差分混沌移位键控, 多输入多输出, 多元混合调制, 比特误码率

Abstract:

In order to improve the bit error rate performance of multiple input multiple output difference chaotic shift keying (MIMO-DCSK) system, an M-ary hybrid modulation MIMO-DCSK (MHM-MIMO-DCSK) is proposed. Firstly, multi bit information in one frame is split and modulated by chaotic spread spectrum code and index code respectively to achieve higher transmission efficiency. Secondly, the receiver uses the quasi-orthogonal property of chaotic sequence to eliminate interference of multi antenna and multi channel. Finally, the results of correlation calculation at each receiving antenna are superimposed by the equal gain combining algorithm, so as to obtain the full diversity gain of multi-path MIMO system without channel state information. Simulation results show that the proposed MHM-MIMO-DCSK has better BER performance than the existing M-ary MIMO-DCSK, especially in the case of high-order modulation.

Key words: differential chaotic shift keying (DCSK), multiple input multiple output (MIMO), M-ary hybrid modulation, bit error rate (BER)

中图分类号:

TN911.3

陈晓婷, 王年, 丁大为, 张公泉, 卢宇. MIMO模型下的多元混合调制DCSK方案[J]. 系统工程与电子技术, 2021, 43(7): 1989-1994.

Xiaoting CHEN, Nian WANG, Dawei DING, Gongquan ZHANG, Yu LU. M-ary hybrid modulation DCSK scheme in MIMO model[J]. Systems Engineering and Electronics, 2021, 43(7): 1989-1994.

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MIMO模型下的多元混合调制DCSK方案

M-ary hybrid modulation DCSK scheme in MIMO model

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