| 改进的调频差分混沌键控通信系统设计 |
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| 引用本文： | 武立,;柏逢明,;罗奇,;刘阳,;毛须伟.改进的调频差分混沌键控通信系统设计[J].长春光学精密机械学院学报,2014(4):129-132. |
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| 作者姓名： | 武立 ;柏逢明 ;罗奇 ;刘阳 ;毛须伟 |
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| 作者单位： | [1]长春理工大学电子信息工程学院,长春130022; [2]燕山大学电子信息工程学院,秦皇岛066004 |
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| 摘 要： | 针对相干解调的CSK需要混沌同步和没有足够的鲁棒性,非相干解调的CSK误码率较高,调频差分混沌键控（FMDCSK）带宽利用率低于一般的CSK等问题,提出了一种提高FMDCSK带宽利用率且不降低误码率的混沌通信设计方案。在FMDCSK基础上利用非相干解调的CSK技术附加1bit后,混合FMDCSK的2个时隙发送2个bit,给出了相应调制解调方案。理论分析和实验结果表明,在混沌信号源带宽相同的条件下,改进的调频差分混沌键控通信系统具有更快的信息传输速率,误码率和传统的FMDCSK相当,提高了通信的保密性。
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| 关 键 词： | 非相干解调 混沌键控 FMDCSK 误码率 |
Design of Improved Hybrid Frequency Modulation Differential Chaos Shift Keying Communication System |
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| Affiliation: | WU Li, BAI Fengming, LUO Qi, LIU Yang, MAO Xuwei (1.School of Electronics and Information Engineering, Changchun University of Science and Technology, Changchun 130022; 2.School of Electronics and Information Engineering, Yanshan University, Qinhuangdao 066004) |
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| Abstract: | This paper presented an improved hybrid frequency modulation differential chaos shift keying（FMDCSK）,which combined FMDCSK with the return map based on non-coherent detection chaos shift keying（CSK）. After using non-coherent detection CSK appended one bit signs based on FMDCSK,two slot time of the mixed FMDCSK could send two bit signs. The corresponding modulation and detection of this system was presented. Theoretical analysis and experimental results show that code rate of the improved FMDCSK is faster than traditional FMDCSK＇s in the condition of the same chaotic signal bandwidth. The bit error rate of the improved FMDCSK is close to FMDCSK＇s,thus improving the confidentiality of communications. |
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| Keywords: | non-coherent detection chaos shift keying（CSK） FMDCSK BER |
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