| 基于正交混沌载波的多用户DCSK系统性能分析 |
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| 引用本文： | 张刚,王传刚,张天骐.基于正交混沌载波的多用户DCSK系统性能分析[J].系统工程与电子技术,2017,39(2):431-436. |
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| 作者姓名： | 张刚 王传刚 张天骐 |
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| 作者单位： | 重庆邮电大学信号与信息处理重庆市重点实验室,重庆 400065 |
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| 摘 要： | 现有的多用户差分混沌移位键控(multiple user differential chaos shift keying, MU-DCSK)算法存在用户间干扰、误码性能不理想等问题。为了提高误码性能,提出一种基于正交混沌载波的多用户差分混沌移位键控(MU-DCSK based on orthogonal chaotic carrier,OMU-DCSK)通信系统。该系统通过设计一种正交混沌信号发生器,利用其转换特性和正交特性,有效降低平均比特能量和彻底消除多址干扰。推导出在瑞利信道中的比特误码率公式并进行仿真。理论分析和仿真结果表明,OMU-DCSK在较小牺牲系统复杂性的条件下,有效提高了系统的误码性能。
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Performance analyze for MU-DCSK system based on orthogonal chaotic carrier |
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| ZHANG Gang,WANG Chuangang,ZHANG Tianqi.Performance analyze for MU-DCSK system based on orthogonal chaotic carrier[J].System Engineering and Electronics,2017,39(2):431-436. |
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| Authors: | ZHANG Gang WANG Chuangang ZHANG Tianqi |
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| Institution: | Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of;
Posts and Telecommunications, Chongqing 400065, China |
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| Abstract: | There are many defects in existing multi-user differential chaos shift keying (MU-DCSK) systems, such as multi user interference and undistinguished bit error rate （BER） performance. To improve BER performance, the MU-DCSK based on the orthogonal chaotic carrier (OMU-DCSK) system is proposed. By introducing an orthogonal chaotic signals generator, the average bit energy is reduced and multi-user interference components are eliminated. The BER over Rayleigh fading channels is derived and numerous simulations are worked. Theoretical analysis and simulation results show that the proposed system has superior BER performance with a little cost in complexity. |
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